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Allen-Bradley 20G1AJF370JN0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1AJF370JN0NNNNN is a high-power PowerFlex 755 air-cooled AC drive designed for demanding industrial motor-control applications where high voltage, high output current, reliable speed regulation, network connectivity, and flexible control are required.

This model belongs to the PowerFlex 750-Series, specifically the PowerFlex 755 AC Drive family. It is designed for large three-phase motors and industrial equipment operating from a 690 VAC supply.

The drive has a nominal output current rating of 370 A and provides different motor power ratings according to the selected operating duty. Its ratings reach approximately 400 kW for Light Duty, 355 kW for Normal Duty, and 300 kW for Heavy Duty.

The 20G1AJF370JN0NNNNN uses an air-cooled Frame 8 construction, with an IP54 / Type 12, 800 mm deep MCC-style enclosure configuration. It is intended for installation in industrial electrical rooms, motor-control centers, process plants, production facilities, and other applications requiring a large-capacity variable-frequency drive.

The model is configured with AC input with precharge and no DC terminals, an integrated input filtering arrangement, and a CM jumper installed configuration.

The drive does not include an integral dynamic-braking transistor in this configuration. Where regenerative or high-inertia braking is required, the braking solution should therefore be engineered separately according to the application.

The model is supplied without a local HIM keypad/display in the basic JN0 configuration. Operator interface, programming, diagnostics, and network control can therefore be implemented through the appropriate control architecture and compatible accessories.

The current product configuration is an active PowerFlex 755 model and serves as the direct replacement for the earlier 20G1AJF370AN0NNNNN configuration.

2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 750-Series
Product Series Model	PowerFlex 755
Product Type	Air-Cooled AC Drive / Variable Frequency Drive
Catalog Number	20G1AJF370JN0NNNNN
Drive Configuration	PowerFlex 755 AC Packaged Drive
Cooling Method	Forced-air / air cooled
Frame Size	Frame 8
Enclosure Configuration	Type 12 / IP54, 800 mm deep MCC style
Input Configuration	AC input with precharge
DC Terminals	No DC terminals
Dynamic Braking	None
CM Configuration	CM jumper installed
HIM	Blank / no HIM
Rated Voltage	690 VAC
Input Phase	Three phase
Nominal Current	370 A
Light-Duty Rating	400 kW
Normal-Duty Rating	355 kW
Heavy-Duty Rating	300 kW
Product Status	Active

The PowerFlex 755 series is positioned as a high-performance industrial drive platform for large motors and sophisticated machine or process-control systems.

The series is particularly suitable when a project requires more than basic motor speed control and needs a drive architecture capable of supporting networking, advanced control functions, safety functions, diagnostics, and integration with a larger automation system.

3. Main Technical Parameters

Parameter	Specification
Catalog Number	20G1AJF370JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Drive Type	Air-Cooled AC Drive
Rated Input Voltage	690 VAC
Input Phase	3 Phase
Nominal Output Current	370 A
Light-Duty Output Rating	400 kW
Normal-Duty Output Rating	355 kW
Heavy-Duty Output Rating	300 kW
Light-Duty Current	410 A continuous
Light-Duty 1-Minute Current	451 A
Normal-Duty Current	370 A continuous
Normal-Duty 1-Minute Current	407 A
Normal-Duty 3-Second Current	555 A
Heavy-Duty Current	308 A continuous
Heavy-Duty 1-Minute Current	339 A
Heavy-Duty 3-Second Current	462 A
Dynamic Braking Transistor	No
Dynamic Braking	None
Input Type	AC input with precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Cooling	Air cooled
Frame	Frame 8
Enclosure Protection	IP54
Enclosure Style	Type 12 / MCC style
Enclosure Depth	800 mm
HIM	Blank / no HIM
Communication	Embedded EtherNet/IP
Motion Function	Not integrated in this configuration
Safety Functions	Supported
Control Capability	Advanced motor-control architecture
PID Control	Supported
Operating Temperature	Approximately -20 to +60 °C
Storage Temperature	Approximately -40 to +70 °C
Approx. Height	2477 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Depth with Filter Arrangement	Up to approximately 898 mm
Approx. Weight	644 kg
Installation Class	Large industrial / MCC-style installation

The current 20G1AJF370JN0NNNNN configuration is specified as a 690 VAC, 370 A PowerFlex 755 drive with 400 kW Light-Duty, 355 kW Normal-Duty, and 300 kW Heavy-Duty ratings. It is a Frame 8, IP54 configuration with filtered input and CM jumper installed. 

4. Duty Rating

One of the important characteristics of the 20G1AJF370JN0NNNNN is its multiple-duty rating structure.

The same drive can be applied to different motor-load conditions depending on the required continuous current, overload capability, acceleration requirements, and process duty.

Duty Class	Continuous Current	1-Minute Current	3-Second Current	Approx. Motor Rating
Light Duty	410 A	451 A	—	400 kW
Normal Duty	370 A	407 A	555 A	355 kW
Heavy Duty	308 A	339 A	462 A	300 kW

The 400 kW Light-Duty rating is appropriate for applications where the motor load is comparatively steady and overload requirements are moderate.

The 355 kW Normal-Duty rating corresponds closely to the nominal 370 A drive current and is suitable for many general industrial motor applications.

The 300 kW Heavy-Duty rating provides a more conservative motor-power selection where the process requires greater overload capability or where the motor is subjected to demanding acceleration and torque conditions.

The correct duty class should always be selected based on actual motor current and application loading rather than motor nameplate power alone.

5. Input and Power Architecture

The 20G1AJF370JN0NNNNN is designed for a 690 VAC three-phase industrial power system.

The high-voltage input architecture makes this model particularly suitable for large motors where a 690 V distribution system is used to reduce current levels and simplify large-motor power distribution.

The drive incorporates an AC input with precharge arrangement.

The precharge function is important in a large-capacity drive because the DC-link capacitors must be charged in a controlled manner when the drive is energized. Controlled precharging helps limit initial inrush current and supports reliable operation of the power section.

This model does not provide external DC terminals as part of the specified configuration. The design is therefore primarily intended around conventional AC input operation rather than applications requiring a common external DC bus connection through dedicated DC terminals.

6. Cooling System

The 20G1AJF370JN0NNNNN is an air-cooled PowerFlex 755 drive.

At this power level, thermal management is an important part of the installation design.

The cooling system moves air through the power electronics and removes heat generated by the switching devices, DC-link components, bus structures, and associated electronics.

The installation location should therefore provide adequate ventilation and sufficient clearance around the drive enclosure.

The heat generated by a 355 kW-class industrial drive can be substantial. For this reason, electrical-room HVAC, cabinet ventilation, ambient temperature, air cleanliness, and maintenance access should all be considered during system design.

The IP54 / Type 12 enclosure configuration provides additional protection compared with an open-frame drive installation and is useful in industrial environments where airborne contaminants and moisture are concerns.

7. Enclosure and Mechanical Construction

The drive uses a Frame 8 construction.

For the specified large-frame IP54 / Type 12 MCC-style configuration, the approximate overall dimensions are:

Mechanical Parameter	Approximate Value
Height	2477 mm
Width	600 mm
Depth	800 mm
Depth with Filter Arrangement	Approx. 898 mm
Approx. Weight	644 kg
Frame	8
Protection	IP54
Enclosure Style	Type 12 / MCC style

These dimensions and weight should be treated as engineering reference values for the Frame 8 cabinet arrangement rather than a substitute for the project-specific mechanical drawing.

Actual shipping dimensions, cabinet combinations, option cabinets, disconnect arrangements, line reactors, bypass equipment, and other system-level configurations can change the final overall footprint and mass.

A drive of this size should be handled using appropriate lifting equipment and a properly engineered installation method.

The mounting structure must be capable of supporting the complete equipment weight, including any associated cabinet sections or accessories.

8. Embedded Communication Capability

The PowerFlex 755 platform is designed for integration into modern industrial automation networks.

The 20G1AJF370JN0NNNNN configuration is associated with embedded EtherNet/IP connectivity, allowing the drive to exchange control commands, status information, operating parameters, diagnostics, and other drive data with an industrial automation controller.

This is particularly useful in large plants where drives are not operated as independent devices but are integrated into a centralized control architecture.

Typical network functions can include:

• Start and stop commands.
• Speed reference control.
• Frequency reference control.
• Drive status monitoring.
• Motor current monitoring.
• Fault and alarm reporting.
• Speed feedback.
• Output frequency monitoring.
• Process-variable monitoring.
• Parameter access.
• Diagnostic information.
• Remote troubleshooting.
• Drive configuration management.

EtherNet/IP integration can substantially reduce hardwired control requirements in large systems and can make drive status information more accessible to operators and maintenance personnel.

9. Control Characteristics

The PowerFlex 755 platform is intended for sophisticated motor-control applications rather than simple fixed-speed motor starting.

Depending on the selected control mode and motor configuration, the drive can be used to manage:

• Motor speed.
• Motor torque.
• Acceleration.
• Deceleration.
• Process pressure.
• Process flow.
• Conveyor speed.
• Pump output.
• Fan capacity.
• Tension.
• Machine throughput.
• Process-variable control.

PID functionality is particularly useful for pump, fan, pressure, flow, and other process-control applications.

Instead of simply commanding a fixed motor frequency, a process-control loop can adjust the drive speed in response to feedback from sensors.

For example, a pump system can use pressure feedback to automatically increase or decrease motor speed according to process demand.

10. Dynamic Braking Configuration

The 20G1AJF370JN0NNNNN is specified with no dynamic-braking transistor.

This is an important selection point.

The absence of an integrated braking transistor does not prevent the drive from being used in all high-inertia applications, but applications requiring rapid deceleration or significant regenerative energy must be evaluated carefully.

For applications such as:

• High-inertia fans.
• Large conveyors.
• Centrifuges.
• Hoisting systems.
• Large rotating machines.
• Rapid acceleration/deceleration machinery.

the engineering team should determine whether the application requires a dedicated braking or regenerative solution.

For applications where the motor naturally operates at relatively stable speed and does not require aggressive deceleration, the absence of an integrated braking transistor is generally not a major limitation.

11. Product Applications

11.1 Large Pumps

The 20G1AJF370JN0NNNNN is well suited to large industrial pump systems.

Typical applications include:

• Water treatment.
• Industrial water supply.
• Cooling-water systems.
• Process-water circulation.
• Chemical process pumps.
• Mining-water systems.
• Power-generation auxiliary pumps.

Variable-speed operation allows the pump motor speed to follow actual process demand rather than continuously operating at full speed.

This can improve process control and reduce unnecessary energy consumption.

11.2 Large Fans and Blowers

Large fans and blowers are another important application area.

Examples include:

• Industrial ventilation.
• Combustion-air fans.
• Exhaust systems.
• Process-air systems.
• Dust-collection systems.
• Furnace ventilation.
• Cement-process fans.
• Mining ventilation.

The drive can regulate fan speed according to airflow or pressure requirements.

For centrifugal fan applications, speed control can provide significant operational advantages because fan power demand changes strongly with speed.

11.3 Conveyors

The drive can be used for large conveyor systems in:

• Mining.
• Bulk material handling.
• Cement plants.
• Ports.
• Steel plants.
• Aggregate processing.
• Warehousing.
• Industrial production lines.

A variable-frequency drive allows controlled acceleration and deceleration, which can reduce mechanical shock on couplings, gearboxes, belts, shafts, and conveyor structures.

11.4 Crushers and Heavy Machinery

The Heavy-Duty rating makes the drive suitable for demanding motor loads when the selected motor current remains within the drive’s heavy-duty limits.

Potential applications include:

• Crushers.
• Material-processing equipment.
• Large mixers.
• Mills.
• Heavy-duty conveyors.
• Industrial processing machinery.

The actual suitability should be determined from the motor nameplate current, starting requirements, overload profile, and mechanical load characteristics.

11.5 Process Machinery

The PowerFlex 755 platform is suitable for process machinery requiring precise speed regulation and automation-system integration.

Examples include:

• Paper-processing machinery.
• Chemical-processing equipment.
• Metal-processing equipment.
• Large extrusion systems.
• Material-processing machinery.
• Production-line machinery.
• Industrial machine tools.
• Continuous-process equipment.

11.6 Mining Applications

High-voltage, high-power drives are frequently required in mining operations.

The 690 VAC / 370 A configuration can be used for suitable large motors in applications such as:

• Mine ventilation.
• Conveyor systems.
• Pump stations.
• Crushers.
• Material-handling equipment.
• Processing plants.
• Dewatering systems.

The IP54 construction is particularly useful for installations where environmental protection is more demanding than a standard open-frame electrical cabinet.

12. Advantages of the 20G1AJF370JN0NNNNN

12.1 High Power Capacity

A major advantage is the drive’s high power capability.

With a Normal-Duty rating of approximately 355 kW, the 20G1AJF370JN0NNNNN is designed for large industrial motors rather than small machine applications.

The 400 kW Light-Duty rating further expands its application range for suitable constant or relatively moderate-load applications.

12.2 690 VAC Industrial Architecture

The 690 VAC rating makes the drive suitable for high-power motor systems using 690 V distribution.

Compared with lower-voltage systems of equivalent power, higher operating voltage allows the required current to remain more manageable.

This can be advantageous in large industrial plants where many high-power motors are installed.

12.3 Multiple Duty Ratings

The Light-Duty, Normal-Duty, and Heavy-Duty ratings provide flexibility during equipment selection.

Instead of treating the drive as having only one motor-power rating, engineers can select the appropriate rating according to the actual load profile.

This is especially valuable in industrial projects where motors may operate under substantially different torque and overload conditions.

12.4 Industrial IP54 Construction

The IP54 / Type 12 configuration provides a more protected installation arrangement than an open-frame drive.

This is beneficial in:

• Manufacturing plants.
• Processing plants.
• Mining facilities.
• Utility plants.
• Industrial electrical rooms.
• Dust-prone environments.

The enclosure nevertheless does not eliminate the need for appropriate environmental engineering, ventilation, temperature control, and maintenance.

12.5 Embedded Network Connectivity

Embedded EtherNet/IP provides a convenient connection between the drive and the plant automation system.

This reduces dependence on extensive discrete wiring and allows operators and control systems to obtain more detailed information from the drive.

12.6 Advanced Industrial Control

The PowerFlex 755 platform is designed for applications that require more sophisticated control than basic frequency adjustment.

This makes it appropriate for machines where speed regulation, torque management, process feedback, diagnostics, and coordinated automation are important.

12.7 Large-Scale Automation Compatibility

The drive can be integrated into larger automation architectures.

This is particularly valuable for projects involving multiple drives, PLC control, HMI monitoring, SCADA systems, distributed I/O, process instrumentation, and plant-wide Ethernet networks.

12.8 Replacement Compatibility

The 20G1AJF370JN0NNNNN is also significant because it replaces the earlier 20G1AJF370AN0NNNNN configuration.

This makes the JN0 model particularly relevant for modernization projects where an existing 370 A / 690 V PowerFlex 755 installation needs to be replaced or upgraded without moving to a completely different drive platform.

13. Recommended Installation Applications

Application	Suitability	Typical Reason
Large centrifugal pumps	Excellent	Variable flow and pressure control
Large industrial fans	Excellent	Efficient speed regulation
Blowers	Excellent	Airflow and pressure control
Water-treatment equipment	Excellent	Pump/process control
Mining conveyors	Very Good	Controlled acceleration and speed
Material handling	Very Good	Smooth motor control
Cement machinery	Very Good	Large motor/process control
Process machinery	Very Good	Networked speed and process control
Crushers	Good	Heavy-duty operation when correctly sized
Large mixers	Good	Torque and speed regulation
Hoisting equipment	Application dependent	Braking/regeneration must be evaluated
Regenerative machinery	Application dependent	External regenerative/braking architecture may be required
Simple small machines	Not recommended	Drive capacity is unnecessarily large

14. Related Models from the Same PowerFlex 755 Series

The following models are closely related 690 VAC PowerFlex 755 Frame 8 configurations and are useful alternatives when selecting a drive for a similar application.

Model	Voltage	Current	Light Duty	Normal Duty	Heavy Duty	Frame	Enclosure / Configuration
20G1AJF265JN0NNNNN	690 VAC	265 A	315 kW	250 kW	200 kW	8	IP54 / 800 mm MCC style
20G1AJF330JN0NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	8	IP54 / 800 mm MCC style
20G1AJF370JN0NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	8	IP54 / 800 mm MCC style
20G1AJF415JN0NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	8	IP54 / 800 mm MCC style
20G1AJF460JN0NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	8	IP54 / 800 mm MCC style

Among these, the 20G1AJF330JN0NNNNN is a logical lower-capacity alternative, while the 20G1AJF415JN0NNNNN and 20G1AJF460JN0NNNNN provide additional capacity when the motor load is above the 370 A class.

The 20G1AJF370JN0NNNNN sits in the middle of this group and provides a useful balance between current capacity and large-motor power capability.

The PowerFlex 755 690 V selection data places the 370 A model at 400 kW Light Duty, 355 kW Normal Duty, and 300 kW Heavy Duty, with the adjacent 265 A, 330 A, 415 A, and 460 A models providing progressively different motor capacities. 

15. JN0 and JN4 Configuration Comparison

For projects where the same power section is required but a local operator interface is desired, the JN0 and JN4 configurations are worth comparing.

Feature	JN0 Configuration	JN4 Configuration
Product Family	PowerFlex 755	PowerFlex 755
Voltage Class	690 VAC	690 VAC
Cooling	Air cooled	Air cooled
Frame	8	8
Typical Protection	IP54 / Type 12	IP54 / Type 12
EtherNet/IP	Embedded	Embedded
Dynamic Braking	None	None
CM Configuration	Jumper installed	Jumper installed
HIM	Blank / no HIM	Enhanced LCD / full numeric HIM configuration
Local Operator Interface	Not included as standard	Included in JN4 configuration
Application Focus	Cabinet/system control	Local operation plus system control

The JN0 version is particularly attractive where the drive is primarily controlled from a PLC, DCS, SCADA system, or remote HMI.

The JN4 configuration is more suitable when operators need a dedicated local interface for setup, monitoring, diagnostics, and parameter adjustment.

16. Five Popular Allen-Bradley Models of the Same Brand

The following models represent widely used Allen-Bradley variable-frequency drive families covering small, medium, and large industrial motor applications.

Model	Series	Voltage	Current / Rating	Typical Power	Frame / Protection	Main Application
25B-D030N114	PowerFlex 525	380–480 VAC, 3PH	30 A	15 kW ND / 11 kW HD	Frame D, IP20	General machine control
25C-D030N114	PowerFlex 527	380–480 VAC, 3PH	30 A	15 kW ND / 11 kW HD	Frame D, IP20	EtherNet/IP machine control
20F1AND302JA0NNNNN	PowerFlex 753	480 VAC, 3PH	302 A	250 HP ND / 200 HP HD	Frame 7	Large industrial machinery
20G1AJE460JN4NNNNN	PowerFlex 755	600 VAC, 3PH	460 A	500 HP LD / 500 HP ND / 400 HP HD	Frame 8, IP54	Large industrial motors
20G1AJF415JN4NNNNN	PowerFlex 755	690 VAC, 3PH	415 A	450 kW LD / 400 kW ND / 355 kW HD	Frame 8, IP54	High-power industrial systems

16.1 25B-D030N114

The 25B-D030N114 belongs to the PowerFlex 525 family and is intended for considerably smaller motors than the 20G1AJF370JN0NNNNN.

Its 380–480 VAC three-phase configuration and approximately 30 A output class make it suitable for general industrial machinery, conveyors, pumps, fans, packaging equipment, and other compact motor-control applications.

Its smaller physical size and lower power rating make it much more economical for small motors than using a large PowerFlex 755 drive.

16.2 25C-D030N114

The 25C-D030N114 belongs to the PowerFlex 527 family.

It is particularly relevant to machine builders that prefer a network-centric drive architecture based around EtherNet/IP.

Its approximately 30 A output class is again much smaller than the 370 A PowerFlex 755.

The PowerFlex 527 is therefore a better fit for distributed machine-level motor control, while the 20G1AJF370JN0NNNNN is intended for large centralized or process-oriented motor applications.

16.3 20F1AND302JA0NNNNN

The 20F1AND302JA0NNNNN is a PowerFlex 753 drive intended for large industrial applications.

With a 480 VAC three-phase supply and approximately 302 A output current, it is suitable for substantial industrial motors.

It provides an alternative PowerFlex architecture for applications where the 480 V class is appropriate.

16.4 20G1AJE460JN4NNNNN

The 20G1AJE460JN4NNNNN is another high-capacity PowerFlex 755 configuration.

It operates in the 600 VAC class and is suitable for large motors requiring several hundred amps of output current.

The JN4 configuration provides a local enhanced operator interface, making it attractive for applications where local drive access is important.

16.5 20G1AJF415JN4NNNNN

The 20G1AJF415JN4NNNNN is especially close to the 20G1AJF370JN0NNNNN in application class.

Both are 690 VAC PowerFlex 755 configurations.

The 415 A model provides additional current and power capacity, making it appropriate when the motor load exceeds the practical capacity of the 370 A model.

The JN4 configuration also adds a local enhanced operator interface compared with the basic JN0 arrangement.

17. Comparison of the 20G1AJF370JN0NNNNN with Related Models

Model	Voltage	Current	LD	ND	HD	Main Difference
20G1AJF265JN0NNNNN	690 VAC	265 A	315 kW	250 kW	200 kW	Lower capacity
20G1AJF330JN0NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	Lower current class
20G1AJF370JN0NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	Target model
20G1AJF415JN0NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	Higher capacity
20G1AJF460JN0NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	Higher capacity

18. Selection Guidelines

The 20G1AJF370JN0NNNNN should not be selected solely because the motor power appears to match the 355 kW rating.

The first selection parameter should normally be the motor’s actual full-load current.

The motor nameplate should be checked for:

• Rated voltage.
• Rated current.
• Rated power.
• Rated frequency.
• Motor speed.
• Motor service factor.
• Motor efficiency.
• Power factor.
• Starting requirements.
• Duty cycle.
• Overload requirements.

The application’s mechanical characteristics should also be reviewed.

A pump or fan with a relatively smooth load profile may use the Light-Duty or Normal-Duty rating.

A conveyor, crusher, mixer, or other mechanically demanding application may require the Heavy-Duty rating.

The drive’s Heavy-Duty rating is lower than its Light-Duty and Normal-Duty power rating because the required overload capability imposes greater thermal and electrical stress on the power stage.

19. Advantages in System Integration

For large industrial projects, the value of the 20G1AJF370JN0NNNNN is not limited to its motor-power rating.

Its broader advantage is its ability to function as part of an integrated automation system.

A typical architecture can include:

Industrial Power Supply → PowerFlex 755 → Large AC Motor

while the control system can be organized as:

PLC / DCS → EtherNet/IP Network → PowerFlex 755 → Motor

with feedback from:

Sensors → Control System → Drive Speed / Torque Command

This architecture allows motor control to become part of the overall process-control strategy.

For example, a pump station can continuously monitor pressure and flow, then adjust motor speed through the drive.

A conveyor system can receive speed commands from the production system and monitor drive current, speed, faults, and operating status.

A ventilation system can adjust fan speed based on pressure or airflow feedback.

This level of integration is one of the principal reasons to use a PowerFlex 755 rather than a basic standalone inverter.

20. Maintenance Considerations

Large industrial drives require a planned maintenance program.

Typical maintenance considerations include:

• Cooling-air flow.
• Fan condition.
• Heat-sink cleanliness.
• Cabinet ventilation.
• Electrical connections.
• Power terminals.
• Grounding connections.
• Network connections.
• Environmental contamination.
• Operating temperature.
• Drive fault history.
• Motor current.
• Output frequency.
• DC-bus behavior.
• Cooling fan operation.

The environment around the drive should be kept within the specified temperature and contamination limits.

Although the IP54 enclosure provides environmental protection, it should not be treated as a substitute for proper electrical-room design.

Dust accumulation, excessive heat, moisture, corrosive gases, or restricted ventilation can significantly reduce the service life of power electronics.

21. Advantages for Industrial Modernization

The 20G1AJF370JN0NNNNN is particularly useful in modernization projects where older high-power variable-frequency drives are being replaced.

A modernization project can benefit from:

• High-voltage 690 VAC compatibility.
• Large motor capacity.
• Ethernet-based control.
• Advanced drive diagnostics.
• Modern control architecture.
• Reduced dependence on hardwired signals.
• Improved operator visibility.
• Easier integration with automation systems.
• Flexible duty selection.
• Availability of related 750-Series models.

The fact that the 20G1AJF370JN0NNNNN is the direct replacement for the older 20G1AJF370AN0NNNNN makes it especially relevant when maintaining an established PowerFlex 755 architecture. 

22. Recommended Use by Industry

Industry	Typical Application	Suitability
Mining	Conveyors, pumps, fans, crushers	Excellent
Cement	Fans, conveyors, mills, pumps	Excellent
Water Treatment	Large pumps and blowers	Excellent
Power Generation	Auxiliary pumps and fans	Excellent
Steel	Fans, pumps, conveyors, processing equipment	Excellent
Chemical Processing	Pumps, fans, mixers	Very Good
Oil & Gas	Pumps and process equipment	Very Good
Paper	Large process motors	Very Good
Manufacturing	Large production machinery	Very Good
Bulk Material Handling	Conveyors and feeders	Excellent
HVAC / Utilities	Large fans and pumps	Excellent
Food Processing	Large pumps and process machinery	Good
Small Machinery	Compact motor control	Not economical

23. Overall Product Assessment

The Allen-Bradley 20G1AJF370JN0NNNNN is a high-capacity industrial variable-frequency drive designed for large 690 VAC three-phase motor applications.

Its 370 A nominal current rating, 400 kW Light-Duty capability, 355 kW Normal-Duty capability, and 300 kW Heavy-Duty capability place it firmly in the large industrial drive category.

The combination of Frame 8 construction, IP54 / Type 12 enclosure protection, air cooling, embedded EtherNet/IP, AC input with precharge, and high-voltage 690 VAC operation makes the model well suited to large pumps, fans, conveyors, process machinery, mining equipment, material-handling systems, and other heavy industrial installations.

The lack of an integrated dynamic-braking transistor is an important configuration characteristic. For applications with significant regenerative energy or very rapid deceleration requirements, braking and regeneration should be evaluated as part of the complete system design.

The JN0 configuration is particularly attractive when the drive is intended to operate as part of a centralized automation system and does not require a dedicated local HIM interface.

For applications requiring a local operator interface, a closely related JN4 configuration can be considered.

From a selection perspective, the most important points are the 690 VAC system voltage, 370 A nominal output current, motor nameplate current, required duty class, overload profile, enclosure requirements, braking requirements, and control-system architecture.

Overall, the 20G1AJF370JN0NNNNN is a strong choice for high-power industrial motor control where a robust PowerFlex 755 architecture, network integration, and large-motor capability are required.

24. Quick Reference Summary

Item	Specification
Brand	Allen-Bradley
Series	PowerFlex 750-Series
Product	PowerFlex 755 AC Drive
Model	20G1AJF370JN0NNNNN
Voltage	690 VAC
Phase	3 Phase
Nominal Current	370 A
Light-Duty Rating	400 kW
Normal-Duty Rating	355 kW
Heavy-Duty Rating	300 kW
Cooling	Air Cooled
Frame	8
Protection	IP54 / Type 12
Cabinet Style	800 mm Deep MCC Style
Input	AC with Precharge
DC Terminals	None
Dynamic Braking	None
Filter	Filtered
CM Jumper	Installed
Communication	Embedded EtherNet/IP
HIM	Blank / No HIM
PID	Supported
Safety Functions	Supported
Approx. Dimensions	2477 × 600 × 800 mm
Approx. Weight	644 kg
Primary Applications	Pumps, fans, conveyors, process machinery, mining, material handling
Related Models	20G1AJF265JN0NNNNN, 20G1AJF330JN0NNNNN, 20G1AJF415JN0NNNNN, 20G1AJF460JN0NNNNN
Alternative Brand Models	25B-D030N114, 25C-D030N114, 20F1AND302JA0NNNNN, 20G1AJE460JN4NNNNN, 20G1AJF415JN4NNNNN