150-F108NBD Allen-Bradley SMC Flex Smart Motor Controller

Catalog Number: 150-F108NBD
Manufacturer: Allen-Bradley / Rockwell Automation
Product Family: Bulletin 150 SMC Flex
Controller Type: Solid-State Soft Starter
Rated Current: 108 A
Main Input Voltage: 200–480 V AC, 3-phase
Input Frequency: 50/60 Hz
Control Voltage: 100–240 V AC
Motor Rating: 20–75 HP at 460 V AC
Enclosure: Open Type
Number of Poles: 3
Starting Configuration: Standard soft start and soft stop
Internal Bypass: Yes
Motor Protection: Integrated electronic overload protection
Control Options: Standard configuration, no additional pump or braking option
UPC: 662073059912
Country of Origin: Mexico

A Modular Soft Starter for Industrial Motor Control

 

The Allen-Bradley 150-F108NBD is a 108 A SMC Flex solid-state motor controller designed to manage motor starting and stopping in three-phase AC systems. It belongs to Rockwell Automation's Bulletin 150 product family and is intended for applications where controlled acceleration and deceleration are preferable to direct-on-line starting.

 

Its standard configuration supports 200–480 V AC main power and 100–240 V AC control power. At 460 V AC, the controller is listed for motor applications in the 20–75 HP range.

 

The SMC Flex platform combines solid-state power switching, integrated bypass contactors, electronic motor protection, metering and diagnostics. Its modular construction also allows maintenance of individual controller components rather than treating the entire assembly as a single undifferentiated unit.

 

This particular catalog number identifies the standard open-type version with 100–240 V AC control power and 200–480 V AC three-phase input.

The controller uses thyristor-based solid-state switching to regulate motor voltage during starting. Once the motor reaches the operating condition, its internal bypass arrangement reduces continuous heat generation in the power semiconductors.

The standard SMC Flex platform also provides multiple starting and stopping methods, including soft start and soft stop, current-limit starting, and other configurable operating modes. The actual operating mode must be selected according to the motor and driven equipment requirements.

Built-in electronic motor overload protection and diagnostic functions provide additional information for motor-control maintenance.

The 108 A rating is available in several catalog configurations. The differences are not limited to the control-voltage supply; some versions also add pump-control or braking functions, while others use different main input-voltage ranges.

1. Standard and functional-option versions

Rockwell's catalog-selection documentation explains the control-voltage and functional-option codes. The official product records specifically confirm the 150-F108NBD, 150-F108NBDB, 150-F108NBR and 150-F108NBRD configurations. Not every theoretical combination should be assumed to be a valid orderable catalog number; confirm the complete code before purchasing.

2. Main input-voltage variations

The 108 A open-type SMC Flex selection also includes versions for different three-phase input-voltage ranges.

These are catalog-family selection patterns documented for the open-type 108 A range. Functional-option suffixes may further modify the configuration. Verify the exact combination against the relevant Rockwell selection documentation.

3. How to read the catalog number

The catalog designation can be broken down into several parts:

For example, in 150-F108NBD, the D immediately before the end identifies the 100–240 V AC control supply. In 150-F108NBDD, the final D adds the braking-control option.

The SMC Flex platform provides more than a basic reduced-voltage starting function.

Depending on the selected configuration and programming, its operating modes include:

• Soft start and soft stop
• Current-limit starting
• Dual-ramp starting
• Full-voltage starting
• Kick-start functionality
• Preset slow-speed operation
• Pump-control operation on the applicable variant
• Smart motor braking on the applicable variant

The controller also incorporates electronic overload protection with selectable trip classes, motor-current monitoring and diagnostic information. Its integrated bypass reduces power-device heating after the starting sequence.

These capabilities make the SMC Flex suitable for industrial motor applications where starting behaviour, stopping characteristics and motor protection need to be coordinated.

 

 

Application Areas and Selection Considerations

The 150-F108NBD can be considered for compatible three-phase motor installations within its rated operating range. Typical applications for the SMC Flex platform include pumps, fans, compressors and conveyors.

 

The standard version is appropriate where controlled starting and stopping are required without the additional pump-control or braking options. Where a process needs pump-specific starting and stopping behaviour or active motor braking, the corresponding configured variant should be evaluated instead.

 

For an existing installation, check the complete catalog number rather than using the 108 A rating as the sole selection criterion.

The 150-F108NBD is an open-type controller intended for installation within a suitable electrical enclosure.

Published dimensions are approximately 443.7 mm high, 196.4 mm wide and 212.2 mm deep, with a weight of approximately 15 kg.

The 108 A model uses power terminals with M10 × 1.5 connection points. Rockwell's selection documentation notes that controllers rated 108 A and above are not supplied with line and load terminal lugs, so the required connection hardware must be checked separately.

Before replacing an existing unit, verify:

• Main supply voltage and phase arrangement
• Control supply voltage
• Motor full-load current and duty requirements
• Required starting and stopping mode
• Whether pump control or braking is required
• Available enclosure space and ventilation
• Required short-circuit protection and coordination

What is Allen-Bradley 150-F108NBD?

It is a 108 A SMC Flex solid-state motor controller with 200–480 V AC three-phase input and 100–240 V AC control power.

What is the difference between 150-F108NBD and 150-F108NBR?

Both are 108 A open-type SMC Flex controllers with the same basic input-voltage range. The NBD version uses 100–240 V AC control power, while the NBR version uses 24 V AC/DC control power.

What is the difference between 150-F108NBD and 150-F108NBDB?

The 150-F108NBD is the standard configuration. The 150-F108NBDB adds the pump-control option.

Does 150-F108NBD have an internal bypass?

Yes. Rockwell specifies an internal bypass arrangement for this controller.

Can the 150-F108NBD operate at 690 V AC?

No. The NBD configuration is specified for a 200–480 V AC input range. The 108 A open-type family also has NZ-series configurations for 230–690 V AC systems, which must be selected according to the application.

What does the final D mean in 150-F108NBDD?

In this extended catalog number, the final D identifies the braking-control option. The D in the base model 150-F108NBD identifies the 100–240 V AC control supply.

Is the SMC Flex the same as the SMC-50?

No. They are different Rockwell Automation soft-starter product families. The SMC-50 is a separate product platform, even though Rockwell provides migration references between selected SMC Flex and SMC-50 ratings.

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