Configured for solid-state soft starting and phase control within Allen-Bradley motor management architectures, the Allen-Bradley 150-F251NBDB (150-F251NBDB Smart Motor Controller) provides direct physical electrical execution.

Part Number Breakdown & Configuration Matrix

• 150: Base designator identifying Allen-Bradley Bulletin 150 solid-state controller platforms.
• F251: Current rating code specifying a 251 A capacity for three-phase motor control applications.
• NBDB: Feature configuration suffix defining open enclosure housing, 200..480 V AC input line voltage range, and 100..240 V AC control power compatibility.

Hardware Specifications

Industrial Control & Drive Interface Integration

Engineered for deterministic networks, the controller manages backplane bus communication velocities and supports EtherNet/IP deterministic network links. It provides precise I/O density scaling and firmware flash compatibility across integrated automation architectures.

Package Ordering Information

• 1 x 150-F251NBDB Smart Motor Controller unit
• 1 x Open enclosure terminal protection cover

Mechanical Setup & Wiring Instructions

• Enclosure Mounting: Secure the open enclosure unit vertically onto a flat, grounded panel backplate to ensure sufficient convective cooling airflow.
• Line Voltage Cabling: Route high-voltage 3-phase input lines away from low-voltage control wiring to prevent electromagnetic induction noise.
• Control Power Isolation: Terminate the 100..240 V AC control power supply with dedicated overcurrent protection devices prior to energization.

Frequently Asked Questions

• What is the nominal three-phase input line voltage range for this controller?

The controller accepts an input line voltage range of 200..480 V AC across 50 or 60 Hz frequencies.

• What is the continuous current rating capacity of the 150-F251NBDB?

The unit is rated for a continuous operational current of 251 A in three-phase configurations.

• What motor horsepower is supported at 460 V ac line input?

The controller supports motor loads up to 200 hp when operating at a 460 V ac rating.

• What control voltage range is required for the internal logic circuits?

The control circuit requires an external supply voltage ranging from 100 to 240 V AC.

• What enclosure classification is assigned to this hardware model?

The unit features an open enclosure design intended for installation inside a protective control cabinet.

• What is the total physical weight of the controller unit?

The unboxed controller weighs 2.06 kg with estimated shipping dimensions of 7.8 x 24 x 21.8 cm.

• Where is this specific smart motor controller manufactured?

The hardware unit is manufactured in the USA.

• Can the controller be serviced while main line voltage is active?

Maintenance or wiring adjustments must be executed only after complete isolation of all hazardous input voltages.