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Allen-Bradley 150-F251NBD SMC-Flex Smart Motor Controller

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Allen-Bradley 150-F251NBD

by Allen-Bradley

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OverviewThe Allen-Bradley 150-F251NBD is a robust solid-state motor controller from the advanced SMC-Flex series, engineered for precise and efficient operation. This smart motor controller, also recognized as a soft starter, facilitates exceptionally smooth motor initiation and cessation for a broad array of medium to large AC induction motors. With an impressive 251 Amp current capacity and compatibility with motors ranging from 100 to 200 HP at 460V AC, the 150-F251NBD presents an optimal solution for rigorous industrial environments. It features a versatile input voltage range of 200-480V AC and a control voltage span of 100-240V AC, ensuring effortless integration into diverse power systems. Designed as an open-type unit, it offers installation flexibility when installed within an appropriate enclosure, guaranteeing both protection and operational integrity.Key Features SMC-Flex Technology: Provides sophisticated motor supervision with comprehensive start-up and safeguarding functions, prolonging equipment life and operational consistency. High Current Rating (251 Amps): Excellently suited for managing the power demands of substantial AC motors across various industrial contexts. Wide Motor Horsepower Range (100-200 HP @ 460V AC): Accommodates a vast spectrum of motor dimensions, enabling flexible deployment across numerous applications. Flexible Input Voltage (200-480V AC): Adapts easily to different global power networks, simplifying integration and reducing compatibility concerns. Versatile Control Voltage (100-240V AC:): Streamlines the design and execution of control circuitry, offering enhanced system adaptability. Advanced Motor Safeguards: Incorporates vital protection elements including overload, phase loss, and under/over voltage protection, ensuring motor longevity and dependable performance. Multiple Starting Modes: Offers various initiation methods such as soft start, current limit, and full voltage, allowing for optimized motor function specifically tailored to application requirements. Technical Specifications Product Type: Smart Motor Controller / Solid State Starter / Soft Starter Catalog Number: 150-F251NBD Series: SMC-Flex Current Rating: 251 A Motor Horsepower Rating: 100-200 HP @ 460V AC Input Voltage: 200-480V AC, 3-phase Control Voltage: 100-240V AC Enclosure Type: Open Type (requires external enclosure) Applications Medium to Large Motor Starting: Perfect for situations requiring regulated acceleration and deceleration of powerful motors. Pumps: Guarantees smooth operation and extended operational life for various pumping systems. Fans and Blowers: Contributes to energy efficiency and reduced mechanical stress in air movement systems. Compressors: Provides reliable initiation for industrial air and gas compressors, minimizing operational interruptions. Conveyors: Improves material handling systems through gentle starts and stops, safeguarding conveyed materials and machinery. Other High-Power Industrial Applications: Suitable for any industrial process where precise motor regulation and protection are critical. Why Choose?Unmatched Reliability: As an Allen-Bradley offering, the 150-F251NBD delivers consistent, dependable operation essential for crucial industrial processes.Enhanced Motor Lifespan: Its advanced soft-start capabilities significantly reduce mechanical strain and electrical surges, extending the operational longevity of your motors.Optimized Energy Consumption: By carefully managing motor acceleration, this smart controller assists in lowering peak current demands, potentially decreasing energy costs.Seamless Integration: The broad voltage ranges and adaptable design facilitate straightforward incorporation into both existing and new industrial setups.Comprehensive Protection: Built-in motor protection features shield against common electrical anomalies, preventing expensive downtime and repairs.Proven Technology: Drawing on the SMC-Flex series' reputation, you gain access to a solution supported by years of innovation and trusted performance in the field.Order NowContact us today to inquire about the Allen-Bradley 150-F251NBD and elevate your motor control capabilities.FAQWhat is the primary function of the Allen-Bradley 150-F251NBD?The 150-F251NBD is a smart motor controller, also known as a soft starter, designed to provide smooth starting and stopping for AC induction motors, thereby reducing mechanical stress and improving overall system efficiency.What is the current rating of this soft starter?It has a robust current rating of 251 Amps, making it suitable for a wide range of medium to large industrial motors.What motor horsepower can the 150-F251NBD handle?This unit is compatible with motors ranging from 100 to 200 HP when operating at 460V AC.Does the 150-F251NBD offer motor protection features?Yes, it includes advanced motor safeguards such as overload, phase loss, and under/over voltage protection to ensure the longevity and reliable operation of your motors.What are the voltage requirements for this device?It operates with an input voltage range of 200-480V AC (3-phase) and a control voltage range of 100-240V AC.Is an external enclosure required for the 150-F251NBD?Yes, it is designed as an open-type device and requires housing within a suitable external enclosure for protection and operational integrity.

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PRODUCT DETAILS

Allen-Bradley 150-F251NBD

Overview

This is a genuine Allen-Bradley component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Allen-Bradley catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Allen-Bradley automation ecosystem

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Allen-Bradley platform with documented conversion notes

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Product Type: Smart Motor Controller / Solid State Starter / Soft Starter
  • Catalog Number: 150-F251NBD
  • Series: SMC-Flex
  • Current Rating: 251 A
  • Motor Horsepower Rating: 100-200 HP @ 460V AC
  • Input Voltage: 200-480V AC, 3-phase
  • Control Voltage: 100-240V AC
  • Enclosure Type: Open Type (requires external enclosure)

Applications

  • Medium to Large Motor Starting: Perfect for situations requiring regulated acceleration and deceleration of powerful motors.
  • Pumps: Guarantees smooth operation and extended operational life for various pumping systems.
  • Fans and Blowers: Contributes to energy efficiency and reduced mechanical stress in air movement systems.
  • Compressors: Provides reliable initiation for industrial air and gas compressors, minimizing operational interruptions.
  • Conveyors: Improves material handling systems through gentle starts and stops, safeguarding conveyed materials and machinery.
  • Other High-Power Industrial Applications: Suitable for any industrial process where precise motor regulation and protection are critical.

Why Choose the 150-F251NBD?

Unmatched Reliability: As an Allen-Bradley offering, the 150-F251NBD delivers consistent, dependable operation essential for crucial industrial processes.

Enhanced Motor Lifespan: Its advanced soft-start capabilities significantly reduce mechanical strain and electrical surges, extending the operational longevity of your motors.

Optimized Energy Consumption: By carefully managing motor acceleration, this smart controller assists in lowering peak current demands, potentially decreasing energy costs.

Seamless Integration: The broad voltage ranges and adaptable design facilitate straightforward incorporation into both existing and new industrial setups.

Comprehensive Protection: Built-in motor protection features shield against common electrical anomalies, preventing expensive downtime and repairs.

Proven Technology: Drawing on the SMC-Flex series' reputation, you gain access to a solution supported by years of innovation and trusted performance in the field.

Availability & Shipping

  • In stock: 150-F251NBD ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every 150-F251NBD ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Allen-Bradley

The 150-F251NBD is a smart motor controller, also known as a soft starter, designed to provide smooth starting and stopping for AC induction motors, thereby reducing mechanical stress and improving overall system efficiency.

Machine down? We ship parts the same day.

New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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Product Condition & Firmware

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