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Allen-Bradley 20G1AJE435JN0NNNNN PowerFlex 755 Air-Cooled AC Drive

1. Product Overview

The Allen-Bradley 20G1AJE435JN0NNNNN is a high-power PowerFlex 755 air-cooled AC drive designed for large industrial motor-control applications.

It is a 600 VAC, three-phase, 435 A, Frame 8 drive configured as an enclosed Type 12 / IP54, 800 mm deep MCC-style package.

The model is designed for large motors and demanding industrial equipment where controlled acceleration, variable-speed operation, reliable motor control, and integration with an industrial automation network are required.

The drive provides approximately 500 HP Light Duty, 450 HP Normal Duty, and 350 HP Heavy Duty motor ratings.

The JN0 configuration is particularly important because this version uses the CM jumper installed arrangement and is supplied with a blank front interface with no HIM.

The drive also includes embedded EtherNet/IP, an EMC filter, AC input with precharge, and no DC terminals.

The combination of high current capability, large Frame 8 construction, industrial enclosure, forced-air cooling, network connectivity, and flexible duty ratings makes this model suitable for large pumps, fans, conveyors, compressors, process machinery, mixers, material-handling systems, and other large AC motor applications.

The product belongs to the PowerFlex 755 family, which is intended for applications requiring more power and application flexibility than compact general-purpose variable-frequency drives.

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2. Brand and Series

Item	Specification
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Family	PowerFlex 755 AC Drives
Product Type	High-Power AC Variable-Frequency Drive
Configuration	Air-Cooled Packaged Drive
Catalog Number	20G1AJE435JN0NNNNN
Voltage Class	600 VAC
Input	Three Phase AC
Current Class	435 A
Frame	Frame 8
Enclosure	Type 12 / IP54
Enclosure Style	800 mm Deep MCC Style
Cooling	Forced Air / Air Cooled
HIM	Blank / No HIM
Network	Embedded EtherNet/IP
CM Configuration	CM Jumper Installed
Filtering	EMC Filter
Dynamic Braking	None

The PowerFlex 755 series is a large industrial drive platform intended for demanding motor-control systems.

The series covers a broad range of motor sizes and configurations, allowing engineers to use a common drive architecture across different areas of a plant.

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3. Complete Product Parameter Table

Parameter	Specification
Model	20G1AJE435JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	Air-Cooled AC Packaged Drive
Input Voltage	600 VAC
Input Phase	3 Phase
Catalog Current	435 A
Light Duty Rating	500 HP
Normal Duty Rating	450 HP
Heavy Duty Rating	350 HP
Frame Size	Frame 8
Cooling	Forced Air
Enclosure	IP54 / NEMA Type 12
Enclosure Style	800 mm Deep MCC Style
Input Type	AC Input with Precharge
DC Terminals	None
EMC Filter	Integrated / Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Communication	Embedded EtherNet/IP
Protection	Standard Protection
DC Bus Voltage	Approximately 725 VDC
Approx. Depth	800 mm
Approx. Weight	Approximately 79.38 kg for the drive unit
Installation Type	Industrial MCC / Electrical Room
Duty Classes	Light Duty / Normal Duty / Heavy Duty

The 800 mm depth is part of the packaged MCC-style configuration.

The approximately 79.38 kg figure should be treated as the equipment-unit weight reported for the drive itself; shipping, cabinet accessories, packaging, and project-specific enclosure arrangements can result in a higher overall installed or shipping weight.

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4. Electrical Specifications

The 20G1AJE435JN0NNNNN is designed for a 600 VAC three-phase electrical system.

Its catalog current is 435 A.

The drive is capable of approximately:

• 500 HP Light Duty
• 450 HP Normal Duty
• 350 HP Heavy Duty

These three ratings are important because the same motor-drive combination can have different suitability depending on the actual load profile.

A relatively steady-load application may use the Light Duty rating.

A general industrial application with moderate overload requirements may use the Normal Duty rating.

A demanding application involving high torque, high inertia, frequent acceleration, or significant overload requirements may need to be evaluated against the Heavy Duty rating.

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5. Detailed Duty Rating

Duty Classification	Continuous Current	1-Minute Current	3-Second Current	Motor Rating
Light Duty	460 A	506 A	—	500 HP
Normal Duty	435 A	479 A	653 A	450 HP
Heavy Duty	355 A	533 A	639 A	350 HP

The duty figures show why drive selection should be based on the actual operating conditions rather than motor horsepower alone.

For a 450 HP motor operating under Normal Duty conditions, the 435 A continuous rating is directly relevant.

For a heavy-duty application, the allowable continuous current is lower because the drive is being used with greater overload capability.

The motor nameplate current, operating cycle, starting torque, acceleration time, inertia, and process load should all be reviewed before final selection.

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6. Model Number Interpretation

The catalog number 20G1AJE435JN0NNNNN identifies a specific PowerFlex 755 configuration.

Catalog Portion	General Meaning
20G	PowerFlex 755 family
1	Drive configuration designation
AJE	600 V large-frame configuration
435	435 A current class
J	CM jumper installed configuration
N0	Blank / No HIM
NNNNN	Additional configuration positions

The 435 portion is the primary current-class identifier.

The J configuration is significant because it indicates that the common-mode capacitor jumper is installed.

The N0 configuration identifies the no-HIM arrangement.

This means that the 20G1AJE435JN0NNNNN is electrically related to other 435 A PowerFlex 755 configurations, but its front-interface and common-mode configuration are different from some closely related catalog numbers.

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7. Frame 8 Construction

The drive uses Frame 8 construction.

Frame 8 is intended for large industrial motor applications.

The larger frame provides physical space for the high-current power section, cooling system, electrical connections, control electronics, and associated components.

Compared with compact drive frames, Frame 8 equipment requires considerably more installation space.

This is normal for a 435 A drive operating in the 600 VAC class.

The large frame also means that mechanical planning is an important part of the installation.

Engineers should consider:

• Cabinet dimensions.
• Cable-entry arrangement.
• Motor cable bending radius.
• Incoming power cable routing.
• Ventilation.
• Service access.
• Door clearance.
• Lifting access.
• Floor loading.
• Maintenance space.

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8. Enclosure

The 20G1AJE435JN0NNNNN is configured as a Type 12 / IP54, 800 mm deep MCC-style drive.

This enclosed construction is intended for industrial electrical installations where the drive needs to be installed as a packaged unit rather than as a bare power module.

The enclosure provides protection appropriate to typical industrial electrical-room environments.

The installation should nevertheless avoid excessive dust, condensation, corrosive chemicals, direct water exposure, and temperatures outside the specified operating range.

The actual installation environment should always be evaluated before equipment selection.

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9. Dimensions and Weight

The catalog configuration specifies an 800 mm deep MCC-style package.

For preliminary layout work, the depth can therefore be treated as:

Depth: approximately 800 mm

The exact overall height and width depend on the applicable packaged construction and drawing configuration.

For procurement and mechanical installation, the final dimensional drawing should be treated as the controlling document.

For weight planning, a commonly listed equipment-unit weight for this specific catalog number is approximately:

79.38 kg

This figure should not automatically be interpreted as the total shipping weight of a complete packaged installation.

Packaging, mounting hardware, cabinet assemblies, accessories, and transportation materials can increase the final shipping weight.

For lifting and transportation planning, the actual shipping documentation should be checked.

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10. Cooling Method

The drive uses forced-air cooling.

At 435 A and 600 VAC, the drive handles a substantial amount of electrical power.

Power semiconductor devices and other electrical components generate heat during operation.

The forced-air cooling system removes heat from the power section and helps maintain acceptable operating temperatures.

For this reason, ventilation is a critical part of the installation.

The electrical room should provide adequate airflow and should not allow hot exhaust air to recirculate into the drive cooling intake.

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11. Cooling and Environmental Considerations

The following factors should be considered during installation:

• Ambient temperature.
• Airflow.
• Cabinet ventilation.
• Cooling fan condition.
• Dust concentration.
• Humidity.
• Heat generated by adjacent equipment.
• Electrical-room ventilation.
• Maintenance access.
• Air inlet cleanliness.
• Air outlet clearance.

A large air-cooled drive can operate reliably for many years when the cooling system is maintained properly.

Dust accumulation around air passages and cooling components should be addressed as part of routine maintenance.

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12. CM Jumper Installed Configuration

One of the key characteristics of the 20G1AJE435JN0NNNNN is the CM jumper installed configuration.

The common-mode capacitor arrangement affects the electrical relationship between the drive power section and ground.

This can be relevant to:

• Grounding.
• Common-mode current.
• Electrical noise.
• EMC behavior.
• Motor-cable installation.
• Motor insulation considerations.
• Bearing-current considerations.
• System grounding architecture.

When replacing an existing drive, the CM configuration should be checked carefully.

A drive with the same voltage, current, and horsepower rating can still have a different electrical configuration if the CM jumper arrangement is different.

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13. EMC Filtering

The model includes an EMC filter.

Variable-frequency drives use high-speed switching of power semiconductor devices.

This switching is essential for motor control, but it can also produce high-frequency electrical components.

The EMC filter helps manage conducted electromagnetic interference.

For an industrial installation, the filter should be considered together with:

• Proper grounding.
• Cabinet bonding.
• Shielded motor cable where required.
• Correct cable termination.
• Separation of control and power cables.
• Correct cable routing.
• Appropriate motor cable construction.

The filter is therefore part of a complete EMC installation strategy.

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14. AC Input with Precharge

The drive uses an AC input with precharge configuration.

The precharge function controls the initial charging of the drive’s DC-link system when the drive is energized.

This is particularly important in high-power equipment because the DC-link capacitor system can represent a substantial electrical load during energization.

The model is also specified with no DC terminals.

This means it is configured for its intended AC input architecture rather than for a common-DC-bus connection arrangement.

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15. DC Bus

The listed DC bus voltage is approximately 725 VDC.

The DC bus is an important internal part of an AC variable-frequency drive.

The incoming AC supply is converted into a DC link, which is then used by the inverter section to create the controlled output waveform for the motor.

The DC bus provides the energy-storage and conversion stage between the incoming AC system and the motor output.

Because the internal DC bus operates at a high voltage, servicing must be performed according to appropriate electrical safety procedures.

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16. Dynamic Braking

The 20G1AJE435JN0NNNNN is configured with no dynamic braking.

This is important for applications where the motor must decelerate rapidly.

During deceleration, the motor can return mechanical energy to the drive.

Depending on the load inertia and deceleration profile, this energy may raise the DC-bus voltage.

Applications with frequent or rapid braking should therefore be evaluated carefully.

If the machine requires substantial regenerative or braking capability, the system may need an appropriate external braking arrangement or a different drive configuration.

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17. Blank Front Interface / No HIM

The N0 configuration indicates a Blank / No HIM arrangement.

This is an important difference compared with an N4 configuration.

The N0 model does not provide the Enhanced LCD Full Numeric HIM mounted on the front of the drive.

This configuration can be useful when local operator control is not required because the drive is controlled through:

• A PLC.
• An HMI system.
• EtherNet/IP.
• A centralized control panel.
• A supervisory control system.
• A plant automation network.

The no-HIM configuration can also be attractive when the drive is installed inside a controlled electrical environment and operators are not expected to make local parameter adjustments.

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18. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication capability.

This allows the drive to participate in an industrial Ethernet control architecture.

Typical information exchanged through the control network can include:

• Start command.
• Stop command.
• Speed reference.
• Drive status.
• Output frequency.
• Motor current.
• Fault status.
• Alarm status.
• Control commands.
• Diagnostic information.
• Parameter information.

This is particularly useful in large industrial plants where many drives are controlled from centralized automation systems.

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19. Industrial Network Integration

A high-power drive such as the 20G1AJE435JN0NNNNN is often installed as part of a larger automation system.

A typical system may include:

PLC → Industrial Ethernet Network → PowerFlex 755 → Large AC Motor

The drive performs the power conversion and motor-control function while the PLC or higher-level automation system determines the required operating state.

This architecture can reduce the need for local operator controls at every drive.

It also makes centralized monitoring easier.

For large plants, this can be a significant maintenance advantage.

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20. Product Introduction

The Allen-Bradley 20G1AJE435JN0NNNNN is intended for applications where a large three-phase AC motor needs variable-speed control.

A fixed-speed motor connected directly to an AC supply normally operates close to its rated speed.

A variable-frequency drive changes the frequency and voltage applied to the motor, allowing the motor operating speed and torque to be controlled according to the machine requirement.

This can provide several practical benefits.

For example, a large pump does not necessarily need to operate at full speed at all times.

A large fan may need different airflow levels during different production conditions.

A conveyor may need different speeds depending on material flow.

A process mixer may need different speeds during loading, mixing, and unloading.

The PowerFlex 755 provides the control platform needed for these types of applications.

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21. Main Product Applications

21.1 Large Pumps

Large pumps are a natural application for the 20G1AJE435JN0NNNNN.

Typical installations include:

• Water-treatment pumps.
• Cooling-water pumps.
• Process-water pumps.
• Industrial circulation pumps.
• Transfer pumps.
• Large irrigation systems.
• Mining-water pumps.

Variable-speed control allows the pump operating point to be adjusted according to process demand.

This can also reduce unnecessary operation at full speed when the process does not require maximum flow.

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22. Large Fans and Blowers

Large industrial fans can require hundreds of horsepower.

The drive can regulate fan speed according to the required airflow.

Applications include:

• Industrial ventilation.
• Furnace fans.
• Exhaust systems.
• Dust-collection systems.
• Cooling systems.
• Process-air systems.
• Mining ventilation.

The ability to adjust speed can also improve process control compared with simple fixed-speed operation.

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23. Conveyor Systems

The 435 A PowerFlex 755 configuration is well suited to large conveyor systems when the motor and load requirements fall within the applicable ratings.

Typical applications include:

• Mining conveyors.
• Coal conveyors.
• Ore conveyors.
• Aggregate conveyors.
• Cement conveyors.
• Bulk-material conveyors.
• Port material-handling systems.

Controlled acceleration can reduce mechanical shock during startup.

This can help reduce stress on:

• Gearboxes.
• Couplings.
• Belts.
• Shafts.
• Bearings.
• Conveyor structures.

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24. Mining Applications

Mining equipment often operates under demanding conditions.

Large motors are commonly used for:

• Conveyors.
• Pumps.
• Ventilation fans.
• Crushers.
• Material-handling systems.
• Dewatering equipment.

The PowerFlex 755 platform can provide variable-speed motor control for suitable applications.

The exact drive rating should be selected according to the motor current, torque requirement, environmental conditions, and operating cycle.

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25. Cement and Aggregate Equipment

Cement and aggregate plants contain many high-power motor loads.

Potential applications include:

• Large fans.
• Conveyors.
• Material-transfer systems.
• Process equipment.
• Dust-collection systems.
• Pumps.

The large-frame PowerFlex 755 configuration is suitable for applications where high motor current and industrial enclosure construction are required.

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26. Compressor Applications

Large compressors can require high starting torque and substantial continuous motor power.

The drive can be used in suitable compressor applications where the motor current and duty requirements match the drive rating.

Potential applications include:

• Industrial air compressors.
• Process compressors.
• Large refrigeration systems.
• Gas-handling systems.
• Process-air equipment.

Compressor applications should be evaluated carefully because the torque profile can vary substantially between different compressor technologies.

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27. Industrial Mixers and Agitators

Large mixers and agitators may have high starting torque requirements.

The drive can provide controlled acceleration and variable operating speed.

Applications include:

• Chemical processing.
• Water treatment.
• Mineral processing.
• Cement production.
• Industrial blending.
• Batch processing.

For these applications, the Heavy Duty rating may become particularly important if the machine starts under a heavily loaded condition.

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28. Process Machinery

The drive can be used for many types of process machinery requiring high-power variable-speed operation.

Examples include:

• Large process pumps.
• Large fans.
• Material-processing systems.
• Industrial production equipment.
• Continuous-process machinery.
• Bulk-material systems.

The ability to integrate the drive into an industrial Ethernet network makes it useful for automated process control.

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29. Material-Handling Equipment

Large material-handling machines often require precise acceleration and controlled speed.

Applications can include:

• Transfer systems.
• Large conveyors.
• Loading equipment.
• Bulk-material handling.
• Production-line transport.
• Industrial lifting-related machinery where the drive configuration is appropriate.

The drive should be evaluated carefully for applications involving regenerative loads or frequent braking because this model does not include standard dynamic braking.

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30. Product Advantages

30.1 High Current Capacity

The 435 A current class provides substantial motor-control capability.

This makes the drive suitable for large industrial motors.

It is intended for applications significantly larger than those normally handled by compact machine-level variable-frequency drives.

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30.2 High Horsepower Capability

The approximate duty ratings are:

500 HP Light Duty

450 HP Normal Duty

350 HP Heavy Duty

This provides a useful range of motor applications within one drive platform.

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30.3 600 VAC Three-Phase Operation

The 600 VAC three-phase configuration is appropriate for high-power industrial motor systems.

The higher voltage class allows large amounts of motor power to be handled within a practical current range.

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30.4 Frame 8 Construction

Frame 8 construction provides the physical space required for high-power components and high-current connections.

It is appropriate for large industrial electrical installations.

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30.5 Industrial Enclosure

The IP54 / NEMA Type 12 enclosure provides an industrial packaged arrangement.

This reduces the need for the system integrator to create a separate basic protective enclosure around the drive.

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30.6 800 mm MCC-Style Construction

The 800 mm deep MCC-style design makes the drive suitable for centralized motor-control installations.

This is especially useful in plants where multiple drives are installed together in electrical rooms.

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30.7 Forced-Air Cooling

Forced-air cooling provides a practical method of removing heat from the high-power drive.

It is suitable for industrial electrical-room applications where adequate ventilation can be provided.

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30.8 Embedded EtherNet/IP

Embedded EtherNet/IP is a major advantage for modern automation systems.

The drive can communicate with the control system without requiring a separate basic communication interface.

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30.9 No-HIM Configuration

The blank / no-HIM configuration is useful for centralized automation systems.

Instead of providing a local keypad on every drive, the plant can manage drive operation through a PLC, HMI, SCADA system, or industrial network.

This can make the installation cleaner when local drive adjustment is not required.

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30.10 CM Jumper Installed

The installed CM jumper provides a defined common-mode capacitor configuration.

This is useful when the drive is being installed in a system designed around the corresponding grounding and common-mode architecture.

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30.11 EMC Filtering

The integrated EMC filter supports electromagnetic-noise management.

This is particularly useful in installations containing:

• PLCs.
• Instrumentation.
• Network equipment.
• Sensors.
• HMI systems.
• Other electronic control devices.

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31. Advantages for Large Industrial Plants

For large industrial plants, the PowerFlex 755 platform offers a standardized approach to high-power motor control.

The same general series can be applied to:

• Pumps.
• Fans.
• Conveyors.
• Compressors.
• Mixers.
• Process equipment.
• Material-handling equipment.

This can simplify maintenance training.

A plant maintenance team can become familiar with the general operating principles and diagnostic structure of the PowerFlex 755 family.

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32. Advantages for System Integrators

The 20G1AJE435JN0NNNNN is useful for system integrators because the drive combines:

• High-power motor control.
• Enclosed construction.
• Embedded EtherNet/IP.
• EMC filtering.
• Defined CM configuration.
• Multiple duty ratings.
• Standardized PowerFlex architecture.

The no-HIM configuration is particularly useful when the integrator intends to provide centralized operator control.

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33. Advantages for Maintenance

Although this model does not include a local HIM, its embedded network capability provides a useful maintenance path.

A maintenance technician can access drive information through the plant control system or compatible engineering tools.

This can provide centralized access to:

• Fault information.
• Status information.
• Operating parameters.
• Current information.
• Speed information.
• Network status.
• Drive alarms.

In a large plant with dozens or hundreds of drives, centralized diagnostics can be much more practical than physically accessing every drive for routine information.

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34. Comparison with 20G1AJE435AN0NNNNN

The 20G1AJE435AN0NNNNN is a closely related configuration.

Parameter	20G1AJE435JN0NNNNN	20G1AJE435AN0NNNNN
Voltage	600 VAC	600 VAC
Current	435 A	435 A
Light Duty	500 HP	500 HP
Normal Duty	450 HP	450 HP
Heavy Duty	350 HP	350 HP
Frame	8	8
Enclosure	IP54 / NEMA 12	IP54 / NEMA 12
Depth	800 mm	800 mm
Cooling	Forced Air	Forced Air
EMC Filter	Yes	Yes
CM Jumper	Installed	Removed
HIM	No HIM	No HIM
Dynamic Braking	None	None
EtherNet/IP	Embedded	Embedded
Input	AC with Precharge	AC with Precharge
DC Terminals	None	None

The most important difference is the CM jumper configuration.

The JN0 version has the CM jumper installed.

The AN0 version has the CM jumper removed.

This difference can be important in grounding and common-mode noise considerations.

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35. Comparison with 20G1AJE435JN4NNNNN

The 20G1AJE435JN4NNNNN is another closely related configuration.

Parameter	20G1AJE435JN0NNNNN	20G1AJE435JN4NNNNN
Voltage	600 VAC	600 VAC
Current	435 A	435 A
Light Duty	500 HP	500 HP
Normal Duty	450 HP	450 HP
Heavy Duty	350 HP	350 HP
Frame	8	8
Cooling	Forced Air	Forced Air
Enclosure	IP54 / NEMA 12	IP54 / NEMA 12
CM Jumper	Installed	Installed
EMC Filter	Yes	Yes
HIM	No HIM	Enhanced LCD Full Numeric HIM
EtherNet/IP	Embedded	Embedded
Dynamic Braking	None	None
Input	AC with Precharge	AC with Precharge
DC Terminals	None	None
MCC Depth	800 mm	800 mm

The primary difference is the operator-interface configuration.

The JN0 model has no HIM.

The JN4 model includes the Enhanced LCD Full Numeric HIM.

For a plant where local commissioning and local fault access are important, the N4 configuration may be preferable.

For a centralized control architecture, the N0 configuration can be a practical choice.

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36. Five Closely Related PowerFlex 755 Models

The following five models are closely related to the 20G1AJE435JN0NNNNN and are useful for neighboring power selections.

Model	Voltage	Catalog Current	Light Duty	Normal Duty	Heavy Duty	Frame	HIM
20G1AJE295JN0NNNNN	600 VAC, 3 PH	295 A	350 HP	300 HP	250 HP	8	No HIM
20G1AJE355JN0NNNNN	600 VAC, 3 PH	355 A	400 HP	350 HP	300 HP	8	No HIM
20G1AJE395JN0NNNNN	600 VAC, 3 PH	395 A	450 HP	400 HP	350 HP	8	No HIM
20G1AJE435JN0NNNNN	600 VAC, 3 PH	435 A	500 HP	450 HP	350 HP	8	No HIM
20G1AJE460JN0NNNNN	600 VAC, 3 PH	460 A	500 HP	500 HP	400 HP	8	No HIM

These five models form a practical current and horsepower range within the 600 V Frame 8 PowerFlex 755 family.

The 435 A version sits near the upper-middle portion of this group.

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37. Detailed Related-Model Parameters

Model	Current	LD Current	ND Current	HD Current	LD HP	ND HP	HD HP	Frame	Approx. Depth
20G1AJE295JN0NNNNN	295 A	355 A	295 A	272 A	350 HP	300 HP	250 HP	8	800 mm
20G1AJE355JN0NNNNN	355 A	395 A	355 A	295 A	400 HP	350 HP	300 HP	8	800 mm
20G1AJE395JN0NNNNN	395 A	435 A	395 A	329 A	450 HP	400 HP	350 HP	8	800 mm
20G1AJE435JN0NNNNN	435 A	460 A	435 A	355 A	500 HP	450 HP	350 HP	8	800 mm
20G1AJE460JN0NNNNN	460 A	510 A	460 A	395 A	500 HP	500 HP	400 HP	8	800 mm

All five are large-frame products, so the physical installation requirements remain substantial even when the current rating changes.

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38. Five Popular Allen-Bradley Models

The following five models represent other commonly encountered Allen-Bradley drive configurations across different power levels and drive families.

Model	Series	Voltage Class	Current / Power Class	Typical Application	Drive Type
25B-D030N114	PowerFlex 525	480 VAC class	30 A class	General machinery, pumps, fans	Compact AC Drive
25C-D030N114	PowerFlex 527	480 VAC class	30 A class	Machine automation	Compact AC Drive
20G1AGC260JN0NNNNN	PowerFlex 755	480 VAC class	260 A class	Large industrial motors	High-Power AC Drive
20G1AGC302JA0NNNNN	PowerFlex 755	480 VAC class	302 A class	Large process equipment	High-Power AC Drive
20G1AGE053JA0NNNNN	PowerFlex 755	480 VAC class	53 A class	Medium/high-power machinery	AC Drive

These are not direct replacements for the 20G1AJE435JN0NNNNN.

They represent different voltage classes, current ranges, enclosure configurations, and application requirements.

They are included as useful same-brand reference models when comparing drive families and power levels.

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39. Application Comparison

Application	Suitability	Reason
Large Water Pump	Excellent	High-power variable-speed control
Cooling-Water Pump	Excellent	Large motor capacity
Process Pump	Excellent	Adjustable speed and process control
Large Fan	Excellent	Variable-speed airflow control
Industrial Blower	Excellent	High-power continuous operation
Mining Conveyor	Excellent	Large motor and controlled acceleration
Cement Conveyor	Excellent	High-current motor control
Bulk Material Conveyor	Excellent	High-power variable-speed operation
Large Compressor	Very Good	High-power AC motor control
Large Mixer	Excellent	Controlled speed and torque
Process Machinery	Excellent	High-power motor control
Material Handling	Excellent	Large motor capacity
Small Pump	Poor	Excessive drive capacity
Small Fan	Poor	Smaller drive would be more appropriate
Small Machine	Poor	Physical and electrical capacity are excessive

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40. Installation Requirements

Because the 20G1AJE435JN0NNNNN is a large Frame 8 drive, installation should be planned at both electrical and mechanical levels.

Electrical considerations include:

• Incoming 600 VAC supply.
• Three-phase power.
• Protective-device coordination.
• Grounding.
• Motor full-load current.
• Motor voltage.
• Motor cable size.
• Motor cable length.
• EMC requirements.
• Control-network requirements.

Mechanical considerations include:

• 800 mm enclosure depth.
• Cabinet access.
• Cable routing.
• Cable bending radius.
• Cooling airflow.
• Service clearance.
• Door clearance.
• Floor loading.
• Transportation route.
• Lifting arrangements.

The drive should not be treated as a small standalone panel component.

It is a substantial industrial power-control assembly and should be included in the plant layout during the design stage.

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41. Motor Selection

The most important parameter when selecting this drive for a specific motor is the motor’s actual nameplate current.

Horsepower provides a useful first reference, but current is a more direct electrical sizing parameter.

For example, a 450 HP motor should be checked against the Normal Duty rating rather than automatically assuming that any 450 HP motor can be operated under any conditions.

The following should be reviewed:

• Motor rated voltage.
• Motor full-load current.
• Motor service factor.
• Motor efficiency.
• Motor power factor.
• Starting torque.
• Maximum operating speed.
• Minimum operating speed.
• Acceleration time.
• Deceleration time.
• Load inertia.
• Operating cycle.
• Ambient conditions.

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42. Heavy-Duty Application Considerations

Heavy-duty applications deserve particular attention.

Typical heavy-duty machinery can include:

• Loaded conveyors.
• High-inertia machinery.
• Crushers.
• Large mixers.
• High-torque process equipment.
• Machinery with frequent acceleration.

The Heavy Duty rating of this model is approximately 350 HP.

This does not mean the drive is incapable of controlling a larger motor under lighter conditions.

It means that the applicable continuous-current and overload capability must be matched to the selected duty classification.

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43. Network-Controlled Architecture

The no-HIM configuration makes the model particularly suitable for centralized automation.

A typical system could be structured as:

PLC

↓

EtherNet/IP Network

↓

PowerFlex 755 Drive

↓

600 VAC Three-Phase Motor

The PLC can issue speed and run commands while receiving status and diagnostic information from the drive.

The machine HMI can provide the operator interface.

This eliminates the need for every drive to have a dedicated local operator keypad.

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44. Maintenance Strategy

A preventive-maintenance program should be established for a large PowerFlex 755 installation.

Typical checks include:

• Cooling fan operation.
• Airflow.
• Dust accumulation.
• Electrical connections.
• Grounding.
• Motor cables.
• Network cables.
• Cabinet condition.
• Drive fault history.
• Drive alarm history.
• Operating temperature.
• Abnormal noise.
• Abnormal vibration.
• Cooling-system condition.
• Operator/control-system communication.

Even though the N0 version has no local HIM, maintenance personnel can still use the automation network and appropriate engineering tools to access operating and diagnostic information.

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45. Troubleshooting Considerations

When troubleshooting a high-power drive, it is useful to separate the problem into several areas.

Incoming Power

Check whether the incoming three-phase supply is present and within the expected range.

Motor

Check the motor nameplate, motor cables, insulation condition, and mechanical load.

Drive

Review drive status, faults, alarms, current, and operating parameters.

Control System

Check PLC commands, network communication, permissives, interlocks, and speed references.

Mechanical System

Check bearings, gearbox condition, belt tension, conveyor loading, pump condition, fan condition, or other mechanical factors.

This systematic approach is particularly important with large drives because replacing the drive without determining the actual fault can result in unnecessary downtime and expense.

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46. Advantages of the No-HIM Configuration

The N0 configuration has several practical benefits.

Centralized Operation

The drive can be controlled from a central HMI or PLC.

Cleaner Drive Front

The drive front does not require a permanently installed keypad.

Network-Based Maintenance

Operating information can be accessed through the automation architecture.

Standardized Plant Control

Multiple drives can use the same centralized operator interface philosophy.

Reduced Local Operator Interaction

This can be useful in electrical rooms where routine local operation is not required.

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47. Important Difference Between N0 and N4

The N0 and N4 configurations should not be treated as identical.

Feature	JN0	JN4
HIM	No HIM	Enhanced LCD Full Numeric HIM
Local Parameter Access	Limited without external interface	Direct local interface
Local Fault Viewing	Through external system/tool	Available at HIM
Network Integration	Embedded EtherNet/IP	Embedded EtherNet/IP
Current	435 A	435 A
Voltage	600 VAC	600 VAC
Frame	8	8
CM Jumper	Installed	Installed
EMC Filter	Yes	Yes
Enclosure	IP54 / NEMA 12	IP54 / NEMA 12

The N0 version is therefore especially appropriate for centralized control architectures.

The N4 version is more convenient when technicians need direct access to the drive interface.

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48. Overall Advantages Summary

Advantage	Practical Benefit
435 A Current Class	Supports large industrial motors
600 VAC	Suitable for high-power systems
500 HP LD	High motor-power capability
450 HP ND	Strong general industrial rating
350 HP HD	Suitable for demanding load profiles
Frame 8	Large high-power architecture
IP54 / NEMA 12	Industrial enclosure protection
800 mm MCC Style	Suitable for centralized installations
Forced Air Cooling	Practical thermal management
EMC Filter	Supports electrical-noise control
CM Jumper Installed	Defined common-mode configuration
Embedded EtherNet/IP	Direct industrial network integration
No HIM	Suitable for centralized control
AC Precharge	Appropriate high-power input architecture
No DC Terminals	Defined AC-input configuration
No Dynamic Braking	Simple base configuration

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49. Overall Product Assessment

The Allen-Bradley 20G1AJE435JN0NNNNN is a large-frame industrial AC drive intended for high-power three-phase motor applications.

Its 600 VAC, 435 A, Frame 8 configuration places it firmly in the large industrial drive category.

The approximately 500 HP Light Duty, 450 HP Normal Duty, and 350 HP Heavy Duty ratings provide flexibility for different machine load profiles.

The IP54 / NEMA Type 12, 800 mm deep MCC-style enclosure provides a packaged industrial installation format.

The forced-air cooling system is appropriate for high-power operation, provided the electrical room and enclosure installation provide adequate airflow.

The embedded EtherNet/IP capability makes the drive well suited to centralized automation systems.

This is especially relevant for modern plants where multiple large drives are connected to PLC-based control systems.

The N0 no-HIM configuration is also significant.

Instead of relying on a front-mounted keypad, the drive can be managed through the plant automation system or an external engineering interface.

This can be an advantage for large plants where drives are installed in centralized electrical rooms and operators interact with equipment through a control-room HMI.

The CM jumper installed configuration should be carefully considered during electrical-system design.

It is particularly important when replacing another PowerFlex 755 because a similar-looking drive with a different CM configuration may not be electrically equivalent for the intended installation.

The integrated EMC filtering also supports a more controlled electrical environment when combined with correct grounding, cable routing, shielding, and cabinet-bonding practices.

The model is particularly suitable for:

• Large pumps.
• Large fans.
• Industrial blowers.
• Mining conveyors.
• Cement conveyors.
• Bulk-material systems.
• Large compressors.
• Process machinery.
• Mixers and agitators.
• Material-handling equipment.
• Other high-power variable-speed motor applications.

The main engineering consideration is correct duty selection.

The 500 HP Light Duty rating should not be used as the only selection criterion.

For a 450 HP motor, for example, the actual motor full-load current and load profile should be checked against the Normal Duty rating.

For high-inertia or high-torque equipment, the Heavy Duty rating may become the more appropriate selection basis.

The physical installation also deserves attention.

The 800 mm deep MCC-style construction requires a properly planned electrical-room layout.

Adequate ventilation, service access, cable space, and maintenance clearance should be provided.

The commonly listed drive-unit weight of approximately 79.38 kg should be distinguished from the final shipping or complete packaged installation weight.

For transportation, lifting, and floor-loading calculations, the actual shipment configuration should be used.

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50. Final Technical Summary

Category	Final Specification
Brand	Allen-Bradley
Series	PowerFlex 755
Model	20G1AJE435JN0NNNNN
Product	PowerFlex 755 Air-Cooled AC Drive
Voltage	600 VAC
Phase	3 Phase
Current	435 A
Light Duty	500 HP
Normal Duty	450 HP
Heavy Duty	350 HP
Frame	Frame 8
Cooling	Forced Air
Enclosure	IP54 / NEMA Type 12
MCC Style	800 mm Deep
Input	AC with Precharge
DC Terminals	None
EMC Filter	Yes
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Network	Embedded EtherNet/IP
DC Bus	Approx. 725 VDC
Approx. Depth	800 mm
Approx. Weight	Approx. 79.38 kg drive-unit weight
Main Applications	Pumps, fans, conveyors, compressors, mixers, process machinery, material handling
Main Strength	High-power industrial motor control with centralized network integration

The 20G1AJE435JN0NNNNN is therefore best viewed as a high-power, Frame 8 PowerFlex 755 drive for centralized industrial motor control, particularly where a 600 VAC three-phase supply, 435 A current class, enclosed MCC-style construction, embedded EtherNet/IP, EMC filtering, and a no-HIM control architecture are required.

Its strongest practical characteristics are the combination of high motor-power capacity, industrial enclosure construction, network integration, flexible duty ratings, forced-air cooling, and a standardized PowerFlex 755 architecture.

For a large plant, the model is especially attractive when the drive will be controlled from a PLC/HMI system rather than operated directly from a local keypad.

For final equipment selection, the motor nameplate current, duty cycle, ambient conditions, braking requirements, grounding arrangement, motor-cable characteristics, required communication architecture, final mechanical drawing, and actual shipment weight should be checked against the project requirements before purchase and installation.