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Allen-Bradley 20G14NF142JA0NNNNN – PowerFlex 755 Air-Cooled AC Drive

1. Product Overview

The Allen-Bradley 20G14NF142JA0NNNNN is a high-capacity PowerFlex 755 AC Drive designed for large industrial motor-control applications.

This model is a 690 VAC, three-phase, air-cooled, open-type drive with a 142 A Normal Duty rating. Its Normal Duty power rating is 132 kW, while the Heavy Duty rating is 110 kW at 119 A.

The drive uses a DC input with precharge configuration and is built on the Frame 6 platform. It is supplied with filtered input configuration and the CM jumper installed, and it includes an internal dynamic braking transistor.

The drive is supplied in a blank configuration without a HIM, making it well suited to systems where the main operator interface is provided through a PLC, HMI, DCS, SCADA system, or industrial communication network.

The combination of high output current, 690 VAC operation, DC-bus capability, dynamic braking transistor, air cooling, Ethernet integration, and PowerFlex 755 control architecture makes the 20G14NF142JA0NNNNN suitable for large pumps, fans, blowers, conveyors, compressors, process machinery, material-handling systems, and other high-power industrial equipment.

2. Brand and Series

Product Information	Specification
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	AC Drive / Variable Frequency Drive
Catalog Number	20G14NF142JA0NNNNN
Drive Type	Air-Cooled AC Drive
Voltage Class	690 VAC
Phase	Three Phase
Input Configuration	DC Input with Precharge
Frame Size	Frame 6
Enclosure	Open Type
Normal Duty Rating	142 A / 132 kW
Heavy Duty Rating	119 A / 110 kW
Dynamic Braking	Internal DB Transistor
HIM	Blank / No HIM
Filtering	Filtered
CM Jumper	Installed
Cooling	Air Cooled
Communication	Embedded Ethernet Capability

The PowerFlex 755 series is intended for higher-performance industrial applications where motor control, speed regulation, braking, diagnostics, communication, and system integration are important.

Compared with smaller general-purpose drives, the PowerFlex 755 platform is better suited to large machines and engineered industrial systems.

3. Main Technical Parameters

Parameter	Specification
Model / Part Number	20G14NF142JA0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Family	PowerFlex 750-Series
Product	PowerFlex 755 AC Drive
Cooling Type	Air Cooled
Input Type	DC Input with Precharge
AC Voltage Class	690 VAC
DC Voltage Class	Approx. 932 VDC
Phase	Three Phase
Normal Duty Current	142 A
Normal Duty Power	132 kW
Heavy Duty Current	119 A
Heavy Duty Power	110 kW
Frame Size	Frame 6
Enclosure Type	Open Type
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	DB Transistor
Internal Dynamic Braking Transistor	Included
Internal Braking Resistor	Not Included
HIM	Blank / No HIM
Ethernet	Embedded Ethernet Capability
Cooling	Forced Air / Air Cooled
Operating Temperature	Approx. 0 to 50 °C
Relative Humidity	Approx. 5 to 95%, non-condensing
Storage Temperature	Approx. -40 to +70 °C
Approx. Height	665.5 mm
Approx. Width	308.0 mm
Approx. Depth	346.4 mm
Approx. Dimensions	665.5 × 308.0 × 346.4 mm
Approx. Weight	38.6 kg

The Frame 6 mechanical envelope is approximately 308.0 mm wide × 665.5 mm high × 346.4 mm deep, with an approximate open-type drive weight of 38.6 kg.

4. Electrical Rating

The main electrical characteristic of the 20G14NF142JA0NNNNN is its 142 A Normal Duty rating.

The drive provides 132 kW Normal Duty capacity and 119 A / 110 kW Heavy Duty capacity.

Duty Rating	Output Current	Power Rating	General Application
Normal Duty	142 A	132 kW	Pumps, fans, blowers, conveyors and other normal industrial loads
Heavy Duty	119 A	110 kW	Higher-load machinery requiring greater overload capability

The distinction between Normal Duty and Heavy Duty is important when sizing the drive.

A 132 kW motor does not automatically mean that every 132 kW application can use this drive under every operating condition.

The actual motor nameplate current, load torque, acceleration profile, overload requirements, operating speed, ambient temperature, and duty cycle should be checked before the final selection is made.

For variable-torque applications such as many large pumps and fans, the Normal Duty rating is often the more relevant rating.

For high-torque or more demanding machinery, the Heavy Duty rating needs to be considered carefully.

5. 690 VAC Three-Phase Design

The 20G14NF142JA0NNNNN is designed for a 690 VAC, three-phase industrial electrical system.

A 690 VAC drive is normally used in larger industrial installations where high-power motors and higher-voltage distribution systems are required.

At a given power level, higher motor voltage can reduce operating current compared with a lower-voltage motor system.

This can provide advantages in large industrial power distribution, although the entire electrical system must be designed for the appropriate voltage class.

The motor, incoming power system, cable insulation, protection equipment, disconnects, grounding, cabinet insulation, and other associated equipment must all be compatible with the 690 VAC installation.

6. DC Input with Precharge

The model uses a DC Input with Precharge configuration.

This is an important characteristic because it allows the drive to be incorporated into DC-bus-based power architectures.

A common DC-bus arrangement can be useful when several drives operate within the same machine or production system.

The precharge function controls the initial charging of the drive’s DC-link capacitors.

Large DC-link capacitors can otherwise create substantial inrush current when the system is energized.

The precharge arrangement therefore provides controlled DC-bus energization and is particularly relevant to engineered common-bus installations.

7. Dynamic Braking

The JA0 configuration includes an internal dynamic braking transistor.

This is one of the most important characteristics of the 20G14NF142JA0NNNNN.

The internal transistor provides the switching element required for dynamic braking when an external braking resistor is used.

The braking resistor itself is not installed inside the drive.

Braking Parameter	Specification
Model / Part Number	20G14NF142JA0NNNNN
Dynamic Braking	Available
Internal DB Transistor	Included
Internal Braking Resistor	Not Included
External Braking Resistor	Applicable where required
Typical Purpose	Dissipation of regenerated braking energy
Suitable Applications	High-inertia loads, controlled stopping and braking-intensive machinery

During deceleration, a motor can operate as a generator and return energy to the DC bus.

If this energy cannot be absorbed by the rest of the system, the DC-bus voltage can rise.

Dynamic braking provides a method for dissipating this energy through an external resistor.

The resistor must be selected according to the actual braking-energy requirements of the machine, including motor inertia, load inertia, stopping time, braking frequency, and duty cycle.

8. JA0 Configuration Versus JN0 Configuration

For this particular PowerFlex 755 family, the difference between JA0 and JN0 is especially important.

Feature	20G14NF142JA0NNNNN	20G14NF142JN0NNNNN
Voltage	690 VAC	690 VAC
Normal Duty Current	142 A	142 A
Normal Duty Power	132 kW	132 kW
Heavy Duty Current	119 A	119 A
Heavy Duty Power	110 kW	110 kW
Input	DC with Precharge	DC with Precharge
Frame	Frame 6	Frame 6
Cooling	Air Cooled	Air Cooled
Enclosure	Open Type	Open Type
Filtering	Filtered	Filtered
CM Jumper	Installed	Installed
HIM	Blank / No HIM	Blank / No HIM
Dynamic Braking Transistor	Included	Not Included
Internal Braking Resistor	Not Included	Not Included
Approx. Dimensions	665.5 × 308 × 346.4 mm	665.5 × 308 × 346.4 mm
Approx. Weight	38.6 kg	38.6 kg

The main difference is the braking configuration.

The JA0 version includes the internal dynamic braking transistor.

The JN0 version does not include the internal dynamic braking transistor.

This distinction should be checked carefully when replacing an existing drive because two models with identical current and power ratings may still have different functional configurations.

9. Air-Cooled Construction

The drive uses an air-cooled forced-air thermal design.

For a 132 kW-class drive, thermal management is an important part of the installation.

During normal operation, power semiconductors and other electronic components generate heat.

The drive’s cooling system moves air through the unit to remove this heat.

The surrounding cabinet must therefore provide enough airflow and sufficient space around the drive.

A poorly ventilated cabinet can cause unnecessary thermal stress even when the drive is correctly sized electrically.

Cabinet temperature, ambient temperature, dust, altitude, ventilation, and the number of drives installed in the same enclosure should all be considered.

10. Open-Type Enclosure

The 20G14NF142JA0NNNNN is supplied as an open-type drive.

This means the drive is normally installed inside a suitable electrical enclosure rather than being exposed directly to the surrounding industrial environment.

The cabinet should provide the necessary protection from:

• Dust.
• Moisture.
• Conductive contamination.
• Accidental contact.
• Excessive temperature.
• Mechanical damage.

The open construction also provides flexibility for system integrators.

The drive can be installed alongside PLC equipment, circuit protection, terminal blocks, network equipment, control power supplies, braking equipment, disconnects, and other electrical components.

11. Filtering and CM Jumper

The catalog configuration specifies Filtered, CM Jumper Installed.

Filtering is important because variable-frequency drives use high-frequency switching devices that can produce electromagnetic noise.

The drive’s filtering configuration works together with:

• Motor cable selection.
• Cable shielding.
• Grounding.
• Cabinet bonding.
• Motor-frame grounding.
• Control-cable routing.
• Network-cable routing.

A good installation is therefore important even when the drive itself includes appropriate filtering hardware.

12. HIM Configuration

The drive is configured as Blank / No HIM.

HIM means Human Interface Module.

A no-HIM configuration is useful in centralized automation systems where the operator does not need to control the drive directly from a local keypad.

Instead, commands can be handled through:

• PLC control.
• HMI control.
• DCS control.
• SCADA systems.
• Ethernet-based automation.
• Remote operator stations.

This arrangement is especially suitable for large production lines containing multiple drives.

13. Ethernet Communication

The drive provides embedded Ethernet communication capability.

This makes it suitable for modern industrial automation systems where drive operation needs to be coordinated with a PLC or other control platform.

Typical networked information can include:

• Start and stop commands.
• Speed reference.
• Frequency reference.
• Motor current.
• Output frequency.
• Drive status.
• Warning status.
• Fault status.
• Diagnostic information.
• Operating parameters.
• Process-related information.

Network integration can reduce the amount of hardwired control wiring required in a large automated machine.

14. Product Applications

Large Pump Applications

The drive is well suited to large pump installations.

Typical applications include:

• Industrial water circulation.
• Cooling-water systems.
• Process pumps.
• Water-treatment equipment.
• Large booster pumps.
• Industrial fluid-transfer systems.

Variable-speed operation allows pump speed to be adjusted according to process demand.

For many variable-torque pump applications, the Normal Duty capacity of 132 kW / 142 A provides a substantial operating range.

Large Fan Applications

Large fans and blowers can also benefit from this drive.

Potential applications include:

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

Large fan motors often operate continuously, making correct thermal sizing and airflow important.

Conveyor Systems

Large conveyors are another strong application.

Controlled motor acceleration can reduce mechanical shock during startup.

Controlled deceleration can also reduce stress on belts, couplings, gearboxes, shafts, and other mechanical components.

Potential applications include:

• Bulk-material conveyors.
• Mining equipment.
• Production-line conveyors.
• Material-transfer systems.
• Packaging equipment.
• Heavy industrial handling systems.

Compressors

Large industrial compressors can require substantial motor current and controlled acceleration.

The PowerFlex 755 platform can provide variable-speed motor control and integration with the larger control system.

The actual compressor characteristics should be considered carefully because torque demand and minimum operating speed can vary considerably between compressor designs.

Blowers

Large industrial blowers can also use the drive for variable-speed operation.

Applications can include:

• Industrial ventilation.
• Process-air systems.
• Combustion-air systems.
• Dust extraction.
• Cooling systems.
• Air-handling equipment.

Mixers and Agitators

Large mixers and agitators may require high starting torque and substantial continuous motor current.

The Heavy Duty rating should be checked carefully for applications involving high-viscosity materials, frequent acceleration, or significant mechanical inertia.

Material-Handling Equipment

The drive can also be used in larger material-handling systems.

Typical equipment includes:

• Transfer machinery.
• Bulk-material handling.
• Feeding equipment.
• Large conveyor systems.
• Production machinery.
• Industrial lifting-related equipment where the braking and control architecture are appropriately engineered.

Process Machinery

The PowerFlex 755 platform is suitable for process equipment where motor speed needs to be coordinated with other machine functions.

Ethernet communication can allow the drive to exchange operating information with the main automation controller.

15. Main Product Advantages

1. High 132 kW Normal Duty Capacity

The biggest advantage of this model is its high output capability.

With 142 A Normal Duty current and 132 kW Normal Duty power, it is suitable for large industrial motors.

This places it above the 98 A / 90 kW and 119 A / 110 kW classes within the same 690 VAC range.

2. 119 A / 110 kW Heavy Duty Capability

The Heavy Duty rating provides a separate operating point for applications requiring a more demanding load profile.

This gives engineers greater flexibility when matching the drive to the actual machine.

3. 690 VAC Industrial Voltage Class

The 690 VAC rating allows the drive to be integrated into higher-voltage industrial motor systems.

This is particularly useful for large motors and industrial plants using 690 VAC distribution.

4. DC Input with Precharge

The DC input configuration makes the drive suitable for engineered DC-bus systems.

This can be particularly useful when several drives share a common DC bus.

5. Internal Dynamic Braking Transistor

The JA0 configuration includes an internal dynamic braking transistor.

This makes the drive a useful option for applications that require external dynamic braking hardware.

It is particularly valuable where the machine has significant rotating inertia and needs controlled deceleration.

6. Embedded Ethernet Capability

The built-in Ethernet capability provides a convenient connection to a modern automation network.

This can simplify monitoring and control of the drive in a centralized plant architecture.

7. Air-Cooled Design

Air cooling provides a practical thermal-management solution for large industrial installations.

It avoids the complexity associated with liquid-cooled drive systems.

8. Frame 6 Industrial Platform

The Frame 6 construction provides a substantial electrical and mechanical platform for high-power motor control.

The drive can be integrated into larger control cabinets and industrial electrical assemblies.

9. Open-Type Flexibility

The open-type construction gives system integrators considerable freedom when designing the surrounding electrical cabinet.

Additional protection, control, communication, and power equipment can be incorporated into the same overall system.

16. Dimensions and Weight

The 20G14NF142JA0NNNNN uses the Frame 6 mechanical platform.

The principal physical dimensions are approximately:

665.5 mm high × 308.0 mm wide × 346.4 mm deep

The approximate open-type drive weight is:

38.6 kg

Mechanical Parameter	Specification
Model / Part Number	20G14NF142JA0NNNNN
Frame Size	Frame 6
Width	308.0 mm
Height	665.5 mm
Depth	346.4 mm
Overall Dimensions	308.0 × 665.5 × 346.4 mm
Approx. Weight	38.6 kg
Enclosure	Open Type
Cooling	Air Cooled
Mounting	Cabinet / Panel Integration
Recommended Mounting Hardware	M6 class

The dimensions above represent the basic Frame 6 open-type mechanical envelope.

Cabinet service clearance, cable-entry space, ventilation clearance, and access for maintenance need to be added during cabinet design.

17. Environmental Parameters

Environmental Parameter	Specification
Model / Part Number	20G14NF142JA0NNNNN
Operating Temperature	Approx. 0 to 50 °C
Storage Temperature	Approx. -40 to +70 °C
Relative Humidity	Approx. 5 to 95%, non-condensing
Cooling	Air Cooled
Enclosure	Open Type
Installation Environment	Protected industrial enclosure
Condensation	Avoided
Ventilation	Required
Dust Protection	Provided by surrounding cabinet
Thermal Management	Required for high-power operation

For continuous high-power operation, maintaining a suitable cabinet environment is important.

High ambient temperature can reduce thermal margin and may influence drive performance and service life.

18. Recommended Same-Series Models

The following five models are useful comparison choices from the same PowerFlex 755 690 VAC DC-input family.

Model / Part Number	Voltage	Normal Duty Current	Normal Duty Power	Heavy Duty Current	Heavy Duty Power	Frame	Approx. Dimensions	Approx. Weight
20G14NF098JA0NNNNN	690 VAC	98 A	90 kW	82 A	75 kW	Frame 6	308 × 665.5 × 346.4 mm	38.6 kg
20G14NF119JA0NNNNN	690 VAC	119 A	110 kW	98 A	90 kW	Frame 6	308 × 665.5 × 346.4 mm	38.6 kg
20G14NF142JA0NNNNN	690 VAC	142 A	132 kW	119 A	110 kW	Frame 6	308 × 665.5 × 346.4 mm	38.6 kg
20G14NF171JA0NNNNN	690 VAC	171 A	160 kW	142 A	132 kW	Frame 7	430 × 881.5 × 349.6 mm	72.6–108.9 kg
20G14NF212JA0NNNNN	690 VAC	212 A	200 kW	171 A	160 kW	Frame 7	430 × 881.5 × 349.6 mm	72.6–108.9 kg

The 20G14NF098JA0NNNNN is a useful lower-capacity alternative when the motor current is below the 142 A requirement.

The 20G14NF119JA0NNNNN provides a step below this model while retaining the same general Frame 6 architecture.

The 20G14NF171JA0NNNNN is the next significant step upward and moves into Frame 7.

The 20G14NF212JA0NNNNN is intended for still larger motor applications and provides a 200 kW Normal Duty rating.

19. Same-Series Power Comparison

Model / Part Number	Normal Duty Current	Normal Duty Power	Heavy Duty Current	Heavy Duty Power	Frame	Approx. Dimensions	Approx. Weight
20G14NF061JA0NNNNN	61 A	55 kW	50 A	45 kW	Frame 6	308 × 665.5 × 346.4 mm	38.6 kg
20G14NF082JA0NNNNN	82 A	75 kW	61 A	55 kW	Frame 6	308 × 665.5 × 346.4 mm	38.6 kg
20G14NF098JA0NNNNN	98 A	90 kW	82 A	75 kW	Frame 6	308 × 665.5 × 346.4 mm	38.6 kg
20G14NF119JA0NNNNN	119 A	110 kW	98 A	90 kW	Frame 6	308 × 665.5 × 346.4 mm	38.6 kg
20G14NF142JA0NNNNN	142 A	132 kW	119 A	110 kW	Frame 6	308 × 665.5 × 346.4 mm	38.6 kg
20G14NF171JA0NNNNN	171 A	160 kW	142 A	132 kW	Frame 7	430 × 881.5 × 349.6 mm	72.6–108.9 kg

This comparison places the 20G14NF142JA0NNNNN directly between the 119 A and 171 A models.

It is therefore a useful choice when the motor requirement is above the 110 kW Normal Duty class but does not require the larger Frame 7 drive.

20. Five Same-Brand Popular Models

The following models represent useful related products across the same brand’s commonly used drive families.

Model / Part Number	Series	Voltage Class	Current / Capacity	Normal Duty Power Class	Heavy Duty Power Class	Cooling	Approx. Dimensions	Approx. Weight
25B-D017N114	PowerFlex 525	480 VAC class	17 A class	Approx. 7.5 kW class	Application dependent	Air Cooled	Configuration dependent	Configuration dependent
25B-D024N114	PowerFlex 525	480 VAC class	24 A class	Approx. 11 kW class	Application dependent	Air Cooled	Configuration dependent	Configuration dependent
25B-D030N114	PowerFlex 525	480 VAC class	30 A class	Approx. 15 kW class	Application dependent	Air Cooled	Configuration dependent	Configuration dependent
20G11NC5P0JA0NNNNN	PowerFlex 755	480 VAC class	50 A class	Approx. 37–45 kW class	Configuration dependent	Air Cooled	Frame/configuration dependent	Configuration dependent
20G11NC072JA0NNNNN	PowerFlex 755	480 VAC class	72 A class	Approx. 55 kW class	Configuration dependent	Air Cooled	Frame/configuration dependent	Configuration dependent

The PowerFlex 525 models are generally better suited to compact and medium-sized machinery.

The PowerFlex 755 models are more appropriate for larger motors and engineered industrial systems.

The exact dimensions and weight of these related models depend on their frame, voltage, enclosure, and option configuration, so they should not be treated as universal physical values.

21. Popular Model Application Comparison

Model / Part Number	Series	Main Application Range	Voltage Class	Approx. Power Range	Approx. Dimensions	Approx. Weight
25B-D017N114	PowerFlex 525	Pumps, fans, conveyors, compact machinery	480 VAC class	7.5 kW class	Configuration dependent	Configuration dependent
25B-D024N114	PowerFlex 525	General industrial machinery	480 VAC class	11 kW class	Configuration dependent	Configuration dependent
25B-D030N114	PowerFlex 525	Process equipment and machinery	480 VAC class	15 kW class	Configuration dependent	Configuration dependent
20G11NC5P0JA0NNNNN	PowerFlex 755	Large pumps, fans and industrial machinery	480 VAC class	37–45 kW class	Configuration dependent	Configuration dependent
20G11NC072JA0NNNNN	PowerFlex 755	Larger pumps, conveyors and process equipment	480 VAC class	Approx. 55 kW class	Configuration dependent	Configuration dependent

These products cover a much broader power range than the 20G14NF142JA0NNNNN.

The selection should be based on motor current and actual load characteristics rather than simply choosing the largest available power rating.

22. Motor Selection

Motor selection should be based primarily on actual motor current and application requirements.

Important information includes:

Motor Selection Parameter	Why It Matters
Motor Rated Voltage	Must match the drive application
Motor Rated Current	Main value for checking drive current capacity
Motor Power	Provides a useful initial sizing reference
Motor Frequency	Determines operating frequency range
Motor Speed	Important for minimum and maximum operating speed
Load Torque	Determines required drive capacity
Starting Torque	Important for demanding loads
Acceleration Time	Influences current demand
Deceleration Time	Important for braking and regeneration
Motor Inertia	Affects acceleration and braking energy
Load Inertia	Can significantly affect stopping requirements
Duty Cycle	Determines thermal and overload requirements
Ambient Temperature	Affects drive thermal performance

A 132 kW motor is not automatically suitable for every 132 kW Normal Duty application.

The actual motor nameplate current and load profile should always be checked.

23. Braking Application Considerations

Because the 20G14NF142JA0NNNNN includes a dynamic braking transistor, it can be considered for machines where braking energy must be dissipated through an external resistor.

Potential applications include:

• High-inertia conveyors.
• Rapid stopping systems.
• Large rotating equipment.
• Material-handling machinery.
• Machines requiring controlled deceleration.
• Equipment with frequent stop/start cycles.

However, the dynamic braking system should be engineered as a complete system.

The external resistor must be appropriately selected for:

• Resistance value.
• Peak braking power.
• Average braking power.
• Braking duration.
• Duty cycle.
• Energy per stop.
• Ambient conditions.
• Installation location.

The drive’s braking transistor does not replace the need for proper braking-energy calculations.

24. Cabinet Design

Because the unit is open type, the cabinet becomes an important part of the finished installation.

The cabinet should be designed around the drive’s:

• Heat generation.
• Airflow.
• Mounting dimensions.
• Cable-entry requirements.
• Service clearance.
• Grounding requirements.
• Electrical protection.
• Environmental conditions.

A practical cabinet design should also provide sufficient room for maintenance.

The approximate drive dimensions are 308.0 × 665.5 × 346.4 mm, but these are only the basic drive dimensions.

Additional space may be needed for:

• Power cables.
• Control wiring.
• Network wiring.
• Ventilation.
• Terminal access.
• Maintenance.
• External braking components.
• Protective equipment.

25. Maintenance Considerations

The air-cooled construction means that airflow and cleanliness should be maintained.

Typical maintenance activities include:

• Inspecting cooling fans.
• Checking ventilation openings.
• Removing excessive dust.
• Checking cabinet temperature.
• Inspecting electrical connections.
• Checking grounding.
• Reviewing fault history.
• Inspecting motor cables.
• Checking communication connections.
• Inspecting braking components.
• Checking the surrounding cabinet environment.

The drive should not be allowed to operate in an environment where dust accumulation blocks airflow or where condensation can occur.

26. System Integration

The 20G14NF142JA0NNNNN is particularly suitable for integration into a larger industrial automation system.

A typical architecture may include:

PLC → Ethernet Network → PowerFlex 755 → Large Industrial Motor

The PLC can provide operating commands and speed references.

The drive manages motor operation while providing status, current, frequency, warning, fault, and diagnostic information back to the control system.

This type of arrangement is useful for production lines where several motors need to be coordinated.

27. Product Positioning

The model can be summarized as:

PowerFlex 755 → 690 VAC → DC Input with Precharge → 142 A → 132 kW Normal Duty → 119 A / 110 kW Heavy Duty → Frame 6 → Filtered → CM Jumper Installed → DB Transistor → No HIM

This makes the model easy to distinguish from related PowerFlex 755 configurations.

The catalog number should be specified completely when purchasing or replacing the drive.

28. Key Specification Summary

Category	Specification
Model / Part Number	20G14NF142JA0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	AC Drive
Voltage	690 VAC
Phase	Three Phase
DC Voltage Class	Approx. 932 VDC
Input	DC Input with Precharge
Normal Duty Current	142 A
Normal Duty Power	132 kW
Heavy Duty Current	119 A
Heavy Duty Power	110 kW
Frame	Frame 6
Cooling	Air Cooled
Enclosure	Open Type
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	DB Transistor
Internal DB Transistor	Included
Internal Braking Resistor	Not Included
HIM	Blank / No HIM
Ethernet	Embedded Ethernet Capability
Operating Temperature	Approx. 0–50 °C
Relative Humidity	Approx. 5–95%, non-condensing
Storage Temperature	Approx. -40–70 °C
Height	Approx. 665.5 mm
Width	Approx. 308.0 mm
Depth	Approx. 346.4 mm
Dimensions	Approx. 308.0 × 665.5 × 346.4 mm
Weight	Approx. 38.6 kg

29. Overall Product Assessment

The Allen-Bradley 20G14NF142JA0NNNNN is a high-power PowerFlex 755 air-cooled AC drive designed for large industrial motor-control systems.

Its 142 A Normal Duty rating and 132 kW Normal Duty capacity place it in the upper portion of the Frame 6 690 VAC PowerFlex 755 range.

For applications requiring Heavy Duty operation, the drive provides approximately 119 A and 110 kW.

The 690 VAC three-phase architecture makes the drive suitable for high-voltage industrial motor systems, particularly large pumps, fans, blowers, conveyors, compressors, and process equipment.

The DC input with precharge configuration makes it useful for common DC-bus and engineered DC-link systems.

One of the strongest functional features of this particular model is the internal dynamic braking transistor. This gives the system designer the option of using an external braking resistor when the machine requires additional braking capability.

The drive’s filtered configuration and CM jumper installed arrangement also supports its use in industrial environments where electromagnetic compatibility and common-mode noise management need to be considered.

The blank/no-HIM configuration is well suited to centralized control architectures where the drive is controlled through a PLC, HMI, DCS, SCADA system, or Ethernet-based automation network.

The air-cooled Frame 6 construction provides a practical solution for cabinet-based industrial installations. With approximate dimensions of 308.0 × 665.5 × 346.4 mm and an approximate weight of 38.6 kg, the drive requires appropriate mechanical support and cabinet planning.

The most important point when comparing this model with related units is the JA0 braking configuration. The 20G14NF142JA0NNNNN includes an internal dynamic braking transistor, while the corresponding JN0 configuration does not.

For a replacement project, the complete catalog number should therefore be matched rather than selecting a drive only by voltage and kW.

In practical terms, the 20G14NF142JA0NNNNN is a strong choice for large industrial applications requiring 690 VAC operation, 142 A Normal Duty current, 132 kW Normal Duty power, 119 A Heavy Duty current, 110 kW Heavy Duty power, DC input with precharge, Frame 6 air cooling, filtered configuration, CM jumper installed, internal dynamic braking transistor, embedded Ethernet capability, and no local HIM.

It is especially well suited to large motor-driven equipment where controlled speed, centralized automation, braking capability, and high-power industrial performance are more important than the compact size associated with smaller drive families.