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Allen-Bradley 20G14NF046JA0NNNNN PowerFlex 755 AC Drive – Detailed Technical Specifications, Product Introduction, Applications, Advantages, and Related Models

1. Product Overview

The Allen-Bradley 20G14NF046JA0NNNNN is a high-voltage, air-cooled PowerFlex 755 AC drive designed for industrial motor-control applications requiring 690 VAC three-phase operation and a relatively high output-current capacity.

The model is rated at 46 A and provides a 37 kW Normal Duty rating and a 30 kW Heavy Duty rating. It uses a Frame 6 open-type construction and is configured for DC input with precharge.

One of the most important characteristics of this particular catalog configuration is the integrated dynamic-braking transistor. The model also includes filtering with the common-mode capacitor jumper installed.

The drive is supplied without a standard HIM, using a blank operator-interface configuration. This arrangement is particularly useful when the drive is intended to operate as part of a larger automation system rather than as a standalone locally operated device.

The combination of 690 VAC operation, 46 A output capability, 37 kW Normal Duty capacity, 30 kW Heavy Duty capacity, DC input with precharge, filtering, and an internal dynamic-braking transistor makes the 20G14NF046JA0NNNNN a substantial industrial drive for medium-to-large motor applications.

2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Model	20G14NF046JA0NNNNN
Voltage Class	690 VAC
Phase	Three Phase
Output Current	46 A
Normal Duty Power	37 kW
Heavy Duty Power	30 kW
Frame Size	Frame 6
Enclosure	Open Type
Cooling	Air Cooled
Input Type	DC Input with Precharge
Dynamic Braking	DB Transistor
Filtering	Filtered
CM Jumper	Installed
Operator Interface	Blank / No HIM
Product Configuration	755 AC Packaged Drive

The model belongs to the PowerFlex 755 AC drive family and is specifically configured as a 690 VAC, three-phase, 46 A drive. The catalog configuration identifies the unit as an air-cooled, open-type Frame 6 drive with DC input and precharge, filtering, an installed CM jumper, and a dynamic-braking transistor.

3. Detailed Technical Parameters

Parameter	Specification
Model Number	20G14NF046JA0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Drive Type	Air-Cooled AC Drive
Voltage	690 VAC
Phase	3 Phase
Output Current	46 A
Normal Duty Rating	37 kW
Heavy Duty Rating	30 kW
Input Type	DC Input with Precharge
Dynamic Braking	DB Transistor
Internal Braking Transistor	Yes
Filtering	Filtered
CM Capacitor Jumper	Installed
Cooling	Air Cooled
Enclosure Type	Open Type
Frame Size	Frame 6
Operator Interface	Blank / No HIM
Approximate DC-Bus Voltage Class	932 VDC
Approximate Height	665.5 mm
Approximate Width	308 mm
Approximate Depth	346.4 mm
Approximate Weight	Approximately 14.5 kg*
Typical Installation	Industrial control cabinet
Typical Motor Type	Three-phase AC motor
Normal Duty Power	37 kW
Heavy Duty Power	30 kW

The catalog information confirms the 46 A, 37 kW Normal Duty, 30 kW Heavy Duty, 690 VAC, three-phase, Frame 6 configuration and the presence of the dynamic-braking transistor.

*The dimensional and weight values above should be treated as approximate engineering references rather than final fabrication values. The exact mechanical drawing for the specific catalog configuration should be used when designing mounting structures, control cabinets, service clearances, lifting arrangements, and final equipment-weight calculations.

4. Product Description

The 20G14NF046JA0NNNNN is designed for applications where a conventional small or medium-sized variable-frequency drive is not sufficient.

Its 690 VAC voltage class allows it to be used with high-voltage industrial motor systems.

The 46 A output rating places the model above the 34 A configuration in the same 690 V family. This provides additional current capacity for larger motors and more demanding loads.

The 37 kW Normal Duty rating is particularly useful for applications where the motor operates under relatively normal industrial loading conditions.

The 30 kW Heavy Duty rating provides a separate selection point for machines where short-duration overload and demanding acceleration conditions are more important.

The model is also configured for DC input with precharge, which makes it especially relevant to common-DC-bus and DC-powered drive architectures.

Unlike the JN configuration, the JA configuration includes an internal dynamic-braking transistor. This distinction is extremely important when the application has significant regenerative energy during deceleration.

The drive is therefore best understood as a high-voltage, high-capacity industrial motor-control component intended to be integrated into a larger electrical and automation system.

5. 690 VAC Three-Phase Architecture

The 690 VAC three-phase configuration is one of the defining characteristics of this model.

A higher motor voltage allows a given power level to be transmitted at lower current compared with a lower-voltage system.

This can become increasingly useful as motor power increases.

For industrial equipment with relatively large motors, 690 VAC systems can provide practical advantages in power distribution, conductor selection, switching equipment, and cabinet architecture.

The 20G14NF046JA0NNNNN is therefore not aimed primarily at small machine applications.

It is better suited to industrial machinery where motor power and system voltage justify the use of a high-voltage drive platform.

6. 46 A Output Rating

The 46 A output rating is a major selection parameter.

Within the 690 V PowerFlex 755 family, the 46 A configuration corresponds to a 37 kW Normal Duty rating and a 30 kW Heavy Duty rating.

The 46 A rating should always be compared with the motor’s actual nameplate current.

Motor kW alone should not be used as the only drive-sizing parameter.

Two motors with the same kW rating can have different current requirements depending on voltage, efficiency, power factor, operating speed, motor design, and application conditions.

The actual motor current, duty cycle, overload requirement, acceleration profile, and environmental conditions should therefore all be considered before selecting the drive.

7. Normal Duty and Heavy Duty Ratings

The model has two important power classifications: Normal Duty and Heavy Duty.

The Normal Duty rating is 37 kW.

The Heavy Duty rating is 30 kW.

This distinction allows the same drive platform to be applied differently depending on the mechanical load and overload requirements.

Duty Classification	Continuous Current	Approx. 1-Minute Overload	Approx. 3-Second Overload	Power Rating
Normal Duty	46 A	50.6 A	69 A	37 kW
Heavy Duty	Approximately 40 A	Approximately 51 A	69 A	30 kW

The 46 A, 37 kW Normal Duty and 30 kW Heavy Duty ratings are established for this 690 V configuration.

The overload values should be treated as application-selection references and should be checked against the applicable technical data for the exact drive revision and operating conditions.

8. Understanding Normal Duty Selection

Normal Duty operation is generally appropriate when the motor and machine do not require the more demanding overload profile associated with Heavy Duty operation.

Typical examples can include pumps, fans, blowers, and relatively steady conveyor loads.

The 37 kW Normal Duty rating gives the drive a considerable operating range.

However, an application should not be classified as Normal Duty simply because the motor’s nameplate says 37 kW.

The mechanical load profile is the more important consideration.

Frequent acceleration, high starting torque, rapid speed changes, or severe mechanical loading can move an application toward Heavy Duty selection.

9. Understanding Heavy Duty Selection

Heavy Duty operation is more relevant when the machine experiences greater short-duration loading.

A 30 kW motor in a demanding application may require more careful drive sizing than a 37 kW motor operating under a relatively steady load.

Applications involving heavy conveyors, high-inertia machinery, crushers, mixers, and equipment with repeated acceleration may require Heavy Duty consideration.

The 30 kW Heavy Duty rating therefore provides useful flexibility within the same 46 A drive configuration.

10. Dynamic Braking Transistor

One of the most important features of the 20G14NF046JA0NNNNN is its internal dynamic-braking transistor.

Dynamic braking is used to manage regenerative energy produced when an AC motor decelerates.

When a motor is rotating and is commanded to slow down, the motor can temporarily behave as a generator.

The resulting energy flows back toward the drive’s DC bus.

If this energy causes the DC-bus voltage to rise beyond an acceptable level, the drive can experience an overvoltage condition.

A dynamic-braking system provides a means of controlling this energy.

The internal braking transistor acts as the switching element in an appropriate braking-resistor arrangement.

This is particularly valuable for high-inertia machinery or applications requiring relatively rapid deceleration.

The catalog information specifically identifies the 20G14NF046JA0NNNNN as having a DB transistor.

11. Dynamic Braking Applications

Dynamic braking can be especially useful in:

• Heavy conveyors.
• High-inertia fans.
• Centrifuges.
• Machine tools.
• Material-handling machinery.
• Rapid-cycle production machinery.
• Large rotating process equipment.
• Machinery requiring frequent stopping.
• Applications with relatively short deceleration times.

In these applications, the braking resistor and braking duty must be correctly selected.

The internal transistor does not mean that the drive automatically contains a complete external braking resistor system.

The complete braking circuit must be designed according to the actual regenerative energy and required braking cycle.

12. DC Input with Precharge

The 20G14NF046JA0NNNNN is configured for DC input with precharge.

This is an important architectural characteristic.

Rather than being limited to a conventional standalone AC-input arrangement, the drive can be incorporated into an appropriate DC-bus power architecture.

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

Without controlled precharging, connecting discharged capacitors directly to a high-energy DC source could result in a very large initial current.

The precharge process reduces this initial current and allows the DC link to reach the appropriate operating condition in a controlled manner.

This feature is particularly useful in common-DC-bus systems where multiple drive units may share a common DC power infrastructure.

13. Common-DC-Bus Applications

Common-DC-bus systems can be useful when multiple motors are part of the same machine or process.

Several drive units can share a common DC power structure, depending on the overall electrical architecture.

This can allow the system designer to manage power flow at a system level rather than treating every drive as a completely independent AC-powered unit.

For coordinated machines, this can provide additional flexibility.

One drive may be accelerating while another is decelerating, creating opportunities for energy to be managed within the common DC system.

The 20G14NF046JA0NNNNN is particularly relevant to this type of application because its catalog configuration specifically provides DC input with precharge.

14. Filtering and CM Jumper

The model is supplied in a filtered configuration with the CM jumper installed.

Filtering is useful in industrial drive installations because the high-frequency switching behavior of power electronics can produce conducted and radiated electrical noise.

The electrical environment around a large drive can include:

• Motor cables.
• Control cables.
• Instrumentation.
• Sensors.
• Communication wiring.
• Other drives.
• Controllers.
• Power supplies.
• Sensitive electronic equipment.

Appropriate filtering, grounding, bonding, cable routing, and shielding should therefore be considered as part of the complete installation.

The filter configuration is an important part of the drive’s catalog configuration, but it should not be considered a replacement for proper system-level EMC engineering.

15. Air-Cooled Construction

The 20G14NF046JA0NNNNN uses an air-cooled design.

Air cooling is practical for many industrial cabinets and equipment rooms because it avoids the need for a dedicated liquid-cooling circuit.

However, the cabinet designer must provide an appropriate thermal environment.

The drive produces heat during normal operation.

The actual thermal load depends on operating current, switching conditions, ambient temperature, motor load, and installation conditions.

When several power devices are installed in the same cabinet, the total heat load can become substantial.

Cabinet ventilation should therefore be designed according to the combined thermal requirements of all equipment.

16. Frame 6 Construction

The 46 A, 690 V configuration is a Frame 6 drive.

Frame size is important because it provides a useful reference for mechanical integration.

It affects cabinet planning, mounting, cable routing, airflow, service access, and equipment handling.

For preliminary planning, the following values can be used as approximate references:

Mechanical Parameter	Approximate Value
20G14NF046JA0NNNNN Height	665.5 mm
20G14NF046JA0NNNNN Width	308 mm
20G14NF046JA0NNNNN Depth	346.4 mm
20G14NF046JA0NNNNN Weight	~14.5 kg
Frame	6
Construction	Open Type
Cooling	Air Cooled

The exact dimensions, mounting-hole pattern, service clearance, and final weight should be verified from the mechanical documentation applicable to the exact catalog configuration before cabinet fabrication.

17. Open-Type Construction

The drive is specified as open type.

An open-type drive is normally installed within an appropriate electrical enclosure.

This gives system integrators considerable flexibility.

A cabinet can contain the drive together with:

• Disconnect equipment.
• Circuit protection.
• Power distribution.
• Control devices.
• Terminal blocks.
• Braking components.
• DC-bus equipment.
• Cooling equipment.
• Machine-control components.

The cabinet should provide adequate protection from the surrounding environment.

Dust, moisture, corrosive contaminants, excessive temperature, vibration, and other environmental factors should be evaluated before final installation.

18. Blank / No HIM Configuration

The 20G14NF046JA0NNNNN is supplied with a blank operator-interface configuration.

This means a standard HIM is not included as part of the catalog configuration.

This can be beneficial for automated systems in which operators interact with the machine through a centralized control panel rather than directly through the drive.

It can also make sense when the drive is installed inside an electrical cabinet.

The blank configuration helps keep the drive focused on its role as a power and motor-control component within a larger automation system.

19. Product Applications

Conveyor Systems

Heavy conveyors are a natural application for this drive class.

Conveyors may require controlled acceleration to prevent mechanical shock.

They may also require controlled deceleration when stopping heavy loads.

If the conveyor has a large rotating mass or requires frequent stopping, the integrated dynamic-braking transistor becomes particularly useful.

The 46 A current rating also provides additional capacity for larger conveyor motors.

Material Handling

Material-handling systems frequently require variable motor speed.

Speed control can improve the movement of materials and allow different production stages to operate at different speeds.

The drive’s dynamic-braking capability can also be useful when the load must stop quickly.

Pumps

Large industrial pumps can benefit from variable-speed control.

The drive can regulate motor speed according to process demand.

This can provide better process flexibility than a fixed-speed motor.

However, the motor’s actual current and the pump’s operating characteristics must be checked carefully before final drive selection.

Fans

Large fans can require considerable motor power and can have significant rotational inertia.

The 37 kW Normal Duty rating makes the drive suitable for many larger fan applications when the motor current falls within the applicable limits.

The braking transistor can also be valuable where controlled stopping is required.

Blowers

Industrial blowers can benefit from variable-speed operation.

Speed control can allow airflow to be adjusted according to process requirements.

As with large fans, the mechanical inertia of the blower assembly should be considered when evaluating deceleration behavior.

Compressors

Large compressor systems can require controlled acceleration and speed regulation.

The drive can be considered where the compressor motor and control architecture are compatible with the 690 V drive configuration.

The application’s starting torque and overload requirements should be evaluated carefully.

Process Machinery

The drive can be applied to various industrial process machines requiring variable-speed AC motor control.

These may include rotating processing equipment, production machinery, and other industrial systems with medium-to-large motors.

Machine Tools

Certain large machine tools can benefit from controlled motor acceleration, speed regulation, and braking.

The dynamic-braking transistor can be particularly useful where the machine has high rotational inertia or requires rapid stopping.

20. Main Product Advantages

High-Voltage Capability

The 690 VAC rating allows the drive to serve high-voltage industrial motor systems.

This makes it appropriate for applications beyond the typical range of smaller low-voltage drive configurations.

46 A Current Capacity

The 46 A output rating provides substantial current capacity.

It also positions the drive as a useful step above the 34 A configuration in the same product family.

37 kW Normal Duty Rating

The 37 kW Normal Duty rating provides a broad range for medium-to-large industrial motors.

This makes the drive useful for pumps, fans, conveyors, blowers, and process machinery.

30 kW Heavy Duty Rating

The 30 kW Heavy Duty rating provides a useful option for applications where overload performance is more important than maximum Normal Duty power.

Internal Dynamic-Braking Transistor

The internal DB transistor is a major advantage when the application requires controlled dissipation of regenerative energy.

This is particularly important for high-inertia loads and short stopping times.

DC Input with Precharge

The DC-input-with-precharge architecture makes the drive suitable for compatible common-DC-bus systems.

This provides additional flexibility compared with a drive intended only for conventional standalone AC input.

Filtered Configuration

The filtered configuration supports industrial electrical-system design where EMC considerations are important.

Correct installation practices are still required.

Frame 6 Platform

The Frame 6 construction provides a substantial platform for industrial motor applications.

It also gives engineers a consistent mechanical reference when comparing models within the same drive family.

21. Five Closely Related Models

The following models are closely related to the 20G14NF046JA0NNNNN within the 690 V PowerFlex 755 family.

Model	Voltage	Current	Normal Duty	Heavy Duty	Frame	Dynamic Braking
20G14NF030JA0NNNNN	690 VAC	30 A	22 kW	18.5 kW	6	DB Transistor
20G14NF034JA0NNNNN	690 VAC	34 A	30 kW	22 kW	6	DB Transistor
20G14NF046JA0NNNNN	690 VAC	46 A	37 kW	30 kW	6	DB Transistor
20G14NF050JA0NNNNN	690 VAC	50 A	45 kW	37 kW	6	DB Transistor
20G14NF061JA0NNNNN	690 VAC	61 A	55 kW	45 kW	6	DB Transistor

These models provide a practical capacity progression.

The 30 A and 34 A models are suitable when the motor requires less current.

The 46 A model is the target configuration.

The 50 A and 61 A models provide additional capacity for larger motors or more demanding applications.

22. Five Related Models Without Internal Dynamic Braking

For projects where an internal dynamic-braking transistor is not required, the corresponding JN configurations can be useful alternatives.

Model	Voltage	Current	Normal Duty	Heavy Duty	Frame	Dynamic Braking
20G14NF030JN0NNNNN	690 VAC	30 A	22 kW	18.5 kW	6	None
20G14NF034JN0NNNNN	690 VAC	34 A	30 kW	22 kW	6	None
20G14NF046JN0NNNNN	690 VAC	46 A	37 kW	30 kW	6	None
20G14NF050JN0NNNNN	690 VAC	50 A	45 kW	37 kW	6	None
20G14NF061JN0NNNNN	690 VAC	61 A	55 kW	45 kW	6	None

The JN configurations are useful comparisons because they show how the braking option can be separated from the main voltage, current, and power selection.

The 46 A JN version has the same basic 690 V, 46 A, 37 kW Normal Duty, and 30 kW Heavy Duty capacity, but without the internal dynamic-braking transistor.

23. Five Same-Brand Popular / Commonly Selected Models

The following models provide a broader selection of commonly considered PowerFlex configurations.

Model	Voltage	Current	Normal Duty	Heavy Duty	Frame	Dynamic Braking
20G14NF020JA0NNNNN	690 VAC	20 A	15 kW	11 kW	6	DB Transistor
20G14NF030JA0NNNNN	690 VAC	30 A	22 kW	18.5 kW	6	DB Transistor
20G14NF034JA0NNNNN	690 VAC	34 A	30 kW	22 kW	6	DB Transistor
20G14NF050JA0NNNNN	690 VAC	50 A	45 kW	37 kW	6	DB Transistor
20G14NF061JA0NNNNN	690 VAC	61 A	55 kW	45 kW	6	DB Transistor

These models cover a useful range of motor capacities while retaining the same general 690 V drive family.

For many projects, the most practical selection approach is to identify the motor’s full-load current first and then compare the application’s duty and braking requirements against the available configurations.

24. Comparison Between 34 A, 46 A, and 50 A Models

Model	Current	Normal Duty	Heavy Duty	Difference from 46 A Model
20G14NF034JA0NNNNN	34 A	30 kW	22 kW	Lower capacity
20G14NF046JA0NNNNN	46 A	37 kW	30 kW	Target model
20G14NF050JA0NNNNN	50 A	45 kW	37 kW	Higher capacity

This comparison demonstrates why the 46 A configuration can be an attractive selection point.

The 34 A model may be sufficient for a motor in the 30 kW class.

The 46 A model increases Normal Duty capacity to 37 kW and Heavy Duty capacity to 30 kW.

The 50 A model increases the available power again to 45 kW Normal Duty and 37 kW Heavy Duty.

This allows system designers to avoid unnecessarily oversizing the drive while still maintaining adequate current and overload capacity.

25. JA Versus JN Configuration

The JA and JN configurations are particularly important when selecting a PowerFlex 755 drive.

Feature	20G14NF046JA0NNNNN	20G14NF046JN0NNNNN
Voltage	690 VAC	690 VAC
Current	46 A	46 A
Normal Duty	37 kW	37 kW
Heavy Duty	30 kW	30 kW
Frame	6	6
DC Input with Precharge	Yes	Yes
Filtering	Yes	Yes
CM Jumper	Installed	Installed
Dynamic Braking Transistor	Yes	No
Cooling	Air Cooled	Air Cooled
Enclosure	Open Type	Open Type
HIM	Blank / No HIM	Blank / No HIM
Main Selection Difference	Internal DB transistor included	Internal DB transistor not included

The JA configuration is therefore particularly useful when internal dynamic braking is part of the required system architecture.

The JN configuration can be more appropriate when dynamic braking is not required or when regenerative energy is handled elsewhere.

26. Mechanical Installation

The open-type Frame 6 construction means that cabinet integration should be carefully planned.

The approximate mechanical reference values are:

Mechanical Parameter	Approximate Value
20G14NF046JA0NNNNN Height	665.5 mm
20G14NF046JA0NNNNN Width	308 mm
20G14NF046JA0NNNNN Depth	346.4 mm
20G14NF046JA0NNNNN Weight	~14.5 kg
Frame	6
Cooling	Air Cooled
Enclosure	Open Type

The actual cabinet should not be fabricated solely from these approximate values.

The final mechanical drawing should be checked for mounting-hole positions, clearances, cable routing, ventilation, service access, and any configuration-specific dimensional differences.

27. Cabinet Thermal Design

Thermal management is one of the most important parts of a large drive installation.

The drive should have sufficient airflow around the cooling system.

Hot air should not simply circulate inside the cabinet and return to the drive intake.

When multiple drives are installed together, the total heat load must be considered.

The cabinet designer should calculate the heat generated by the complete electrical system rather than looking at the drive in isolation.

This is particularly important for installations operating continuously at high load or in environments with elevated ambient temperature.

28. Electrical Installation

The 20G14NF046JA0NNNNN operates within a high-energy electrical environment.

The DC bus can contain hazardous voltage even after the incoming power source has been disconnected.

Proper isolation, discharge procedures, verification, grounding, protective equipment, and maintenance procedures are therefore essential.

Because the drive uses DC input with precharge, the DC power architecture should be designed carefully.

The precharge arrangement, DC-bus protection, disconnect strategy, power source, and energy-management system should all be considered together.

29. Motor Selection

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

Motor Parameter	Importance
Motor Voltage	Must match the intended drive/motor system
Full-Load Current	Primary drive-sizing parameter
Motor Power	Important but should not be considered alone
Base Frequency	Determines normal operating region
Rated Speed	Important for speed-control requirements
Starting Torque	Important for demanding machinery
Load Inertia	Important for deceleration
Acceleration Time	Influences current demand
Deceleration Time	Influences regenerative energy
Duty Cycle	Determines overload requirements
Ambient Temperature	Influences thermal performance
Motor Cable Length	Can influence electrical and EMC behavior

A 37 kW motor does not automatically require the 37 kW Normal Duty configuration.

The actual motor current should be checked first.

Similarly, a motor rated at 30 kW may require Heavy Duty selection if the machine demands frequent overload or high starting torque.

30. Braking Resistor Considerations

Because the 20G14NF046JA0NNNNN contains an internal dynamic-braking transistor, it can be considered for applications requiring external braking-resistor arrangements.

However, the braking resistor cannot be selected simply from the motor’s kW rating.

The following factors are important:

• Motor speed.
• Motor inertia.
• Load inertia.
• Deceleration time.
• Number of braking events.
• Braking frequency.
• Regenerative energy.
• Ambient temperature.
• Resistor thermal capacity.
• DC-bus voltage.

The braking resistor must be capable of absorbing the required energy without exceeding its thermal limits.

This is particularly important for machines with repeated high-energy stopping cycles.

31. High-Inertia Applications

High-inertia applications are among the strongest candidates for the JA configuration.

A large fan, centrifuge, flywheel, or heavy conveyor can contain significant mechanical energy while rotating.

When the drive commands a rapid stop, that energy has to go somewhere.

If the energy is returned to the DC bus, the bus voltage can increase.

Dynamic braking provides a practical way to manage this energy.

The 20G14NF046JA0NNNNN is therefore particularly attractive where high-inertia equipment requires controlled deceleration.

32. Applications Where the JN Version May Be Preferable

The JN version can be preferable when internal dynamic braking is not required.

For example, a relatively low-inertia machine with long deceleration times may not require the internal braking transistor.

Likewise, a common-DC-bus system may have a separate regenerative-energy management architecture.

In these situations, the additional braking capability of the JA version may not provide a meaningful benefit.

The correct selection should therefore be based on the complete system architecture rather than simply choosing the configuration with more features.

33. Product Advantages for System Integrators

The 20G14NF046JA0NNNNN offers several advantages for machine builders and system integrators.

First, the 690 VAC rating provides access to higher-voltage motor systems.

Second, the 46 A current rating gives the drive a substantial power range.

Third, the 37 kW Normal Duty rating makes it suitable for many medium-to-large industrial loads.

Fourth, the 30 kW Heavy Duty rating provides flexibility for demanding applications.

Fifth, the internal dynamic-braking transistor supports applications with regenerative energy.

Sixth, the DC input with precharge configuration makes the drive suitable for common-DC-bus architectures.

Finally, the filtered Frame 6 open-type construction provides a practical platform for integration into industrial electrical cabinets.

34. Recommended Application Matching

Application	Suitability	Important Consideration
Heavy Conveyor	Excellent	Braking energy and overload
Material Handling	Excellent	Acceleration and stopping
Large Fan	Excellent	Inertia and deceleration
Industrial Blower	Excellent	Motor current and inertia
Pump	Very Good	Process speed requirements
Compressor	Very Good	Starting torque and duty
Process Machinery	Excellent	Duty cycle and motor current
Machine Tool	Very Good	Speed range and braking
Common DC Bus	Excellent	DC-bus system design
High-Inertia Equipment	Excellent	Dynamic braking requirements
Rapid-Cycle Equipment	Very Good	Braking duty and thermal loading

35. Five Same-Series Models for Capacity Selection

Model	Voltage	Current	ND Power	HD Power	Frame	Main Difference
20G14NF023JA0NNNNN	690 VAC	23 A	18.5 kW	15 kW	6	Smaller capacity
20G14NF030JA0NNNNN	690 VAC	30 A	22 kW	18.5 kW	6	Smaller capacity
20G14NF034JA0NNNNN	690 VAC	34 A	30 kW	22 kW	6	Moderate capacity
20G14NF046JA0NNNNN	690 VAC	46 A	37 kW	30 kW	6	Target model
20G14NF050JA0NNNNN	690 VAC	50 A	45 kW	37 kW	6	Higher capacity

This group provides a straightforward progression around the target model.

The 23 A and 30 A configurations can be considered for smaller motors.

The 34 A version provides an intermediate option.

The 46 A model provides 37 kW Normal Duty capacity.

The 50 A model provides an additional step upward for larger motor applications.

36. Five Larger Models for Higher-Power Applications

Model	Voltage	Current	Normal Duty	Heavy Duty	Frame	Dynamic Braking
20G14NF050JA0NNNNN	690 VAC	50 A	45 kW	37 kW	6	DB Transistor
20G14NF061JA0NNNNN	690 VAC	61 A	55 kW	45 kW	6	DB Transistor
20G14NF082JA0NNNNN	690 VAC	82 A	75 kW	55 kW	6	DB Transistor
20G14NF098JA0NNNNN	690 VAC	98 A	90 kW	75 kW	6	DB Transistor
20G14NF119JA0NNNNN	690 VAC	119 A	110 kW	90 kW	6	DB Transistor

These larger configurations can be considered when the 46 A drive does not provide enough current or power capacity.

The exact selection should always be based on the motor nameplate current and the required duty class.

37. Electrical Capacity Progression

The 690 V family provides multiple capacity steps.

Current Class	Normal Duty	Heavy Duty
12 A	7.5 kW	5.5 kW
15 A	11 kW	7.5 kW
20 A	15 kW	11 kW
23 A	18.5 kW	15 kW
30 A	22 kW	18.5 kW
34 A	30 kW	22 kW
46 A	37 kW	30 kW
50 A	45 kW	37 kW
61 A	55 kW	45 kW
82 A	75 kW	55 kW
98 A	90 kW	75 kW
119 A	110 kW	90 kW

The 46 A configuration therefore occupies an important middle position within the 690 V product range. The progression also makes it easier to select a drive based on the actual motor current instead of choosing a substantially oversized unit.

38. Quick Comparison with the 20G14NF034JA0NNNNN

Parameter	20G14NF034JA0NNNNN	20G14NF046JA0NNNNN
Voltage	690 VAC	690 VAC
Current	34 A	46 A
Normal Duty	30 kW	37 kW
Heavy Duty	22 kW	30 kW
Frame	6	6
Dynamic Braking	DB Transistor	DB Transistor
DC Input with Precharge	Yes	Yes
Filtering	Yes	Yes
CM Jumper	Installed	Installed
Cooling	Air Cooled	Air Cooled
Enclosure	Open Type	Open Type
Approx. Dimensions	665.5 × 308 × 346.4 mm	665.5 × 308 × 346.4 mm
Approx. Weight	~14.5 kg	~14.5 kg

The main difference between these two configurations is the electrical capacity.

The 46 A model provides significantly more current and increases the Normal Duty rating from 30 kW to 37 kW while increasing Heavy Duty capacity from 22 kW to 30 kW.

39. Selection Advantages of the 46 A Model

The 46 A configuration is particularly useful when a 34 A drive is close to the required motor current but does not provide enough margin.

Moving from 34 A to 46 A provides a substantial increase in available current.

This can be useful when the motor has a higher nameplate current or when the machine has more demanding operating requirements.

At the same time, moving directly to a 50 A configuration may provide more capacity than necessary.

The 46 A model therefore occupies a useful position between these two selection points.

40. Typical Industrial System Architecture

A typical system using this drive can contain several major sections.

The first section is the power source.

The second section is the DC-bus and precharge architecture.

The third section is the drive.

The fourth section is the motor.

The fifth section is the machine.

The sixth section is the control system.

For applications requiring dynamic braking, a braking resistor arrangement may also be incorporated.

Each section must be designed together.

The drive should never be selected independently of the motor and machine.

41. Maintenance Considerations

Regular maintenance of an air-cooled industrial drive should include inspection of the cooling path and cabinet environment.

Dust accumulation can restrict airflow.

Excessive heat can increase thermal stress.

Loose electrical connections can create additional heating.

The cooling system should therefore be inspected as part of normal equipment maintenance.

The DC-bus system also requires appropriate electrical safety procedures.

Because the drive can contain hazardous stored energy after power removal, maintenance personnel should follow the applicable isolation and discharge procedures before working on the equipment.

42. Overall Technical Profile

Category	20G14NF046JA0NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Voltage	690 VAC
Phase	Three Phase
Output Current	46 A
Normal Duty	37 kW
Heavy Duty	30 kW
Input	DC Input with Precharge
Dynamic Braking	DB Transistor
Filtering	Filtered
CM Jumper	Installed
Cooling	Air Cooled
Enclosure	Open Type
Frame	6
HIM	Blank / No HIM
Approx. Height	665.5 mm
Approx. Width	308 mm
Approx. Depth	346.4 mm
Approx. Weight	~14.5 kg
Main Application	Industrial Motor Control
Major Feature	Integrated Dynamic-Braking Transistor
Main System Architecture	DC-Bus / Industrial Variable-Speed Motor Control

43. Final Assessment

The Allen-Bradley 20G14NF046JA0NNNNN is a high-capacity 690 VAC PowerFlex 755 AC drive intended for demanding industrial motor-control applications.

Its 46 A output rating gives it substantially more capacity than the 30 A and 34 A configurations in the same family.

The 37 kW Normal Duty rating makes it suitable for a broad range of industrial machinery, while the 30 kW Heavy Duty rating provides additional flexibility for applications requiring greater overload capability.

The integrated dynamic-braking transistor is one of the most important advantages of this particular configuration.

It makes the model especially attractive for high-inertia machinery, rapid deceleration, frequent stopping, and applications where regenerative energy must be managed.

The DC input with precharge configuration also makes the drive particularly relevant to common-DC-bus architectures.

The filtered configuration and installed CM jumper provide useful features for industrial electrical-system design, although proper grounding, bonding, cable routing, and EMC practices remain essential.

The Frame 6 air-cooled open-type construction makes the drive suitable for installation inside a properly engineered industrial cabinet.

The blank HIM configuration is also useful when the drive is intended to operate as part of a larger automated machine and local front-panel operation is not required.

From a practical selection standpoint, the 20G14NF046JA0NNNNN is a strong choice when the application requires approximately 46 A at 690 VAC, up to 37 kW Normal Duty or 30 kW Heavy Duty capacity, and benefits from an internal dynamic-braking transistor.

The most important parameters to verify before purchase or installation are the motor nameplate current, motor voltage, duty classification, acceleration requirements, deceleration requirements, braking energy, DC-bus architecture, ambient temperature, cabinet cooling, and mechanical installation requirements.

Compared with the 20G14NF034JA0NNNNN, the 46 A model provides a meaningful increase in current and power capacity.

Compared with the 20G14NF050JA0NNNNN, it provides a slightly smaller capacity that may be preferable when a 50 A drive would be unnecessarily large.

For this reason, the 46 A configuration represents a useful balance between electrical capacity and system size within the 690 V PowerFlex 755 family.

In summary, the 20G14NF046JA0NNNNN combines high-voltage 690 VAC operation, 46 A output capacity, 37 kW Normal Duty performance, 30 kW Heavy Duty performance, DC input with precharge, filtered construction, Frame 6 packaging, air cooling, and an internal dynamic-braking transistor.

For industrial machinery requiring controlled variable-speed operation at this voltage and power level, particularly where braking and DC-bus integration are important, it is a highly capable configuration within the PowerFlex 755 platform.