Allen-Bradley 150-F251NBD SMC Flex Motor Controller 3-Phase

Allen-Bradley 150-F251NBD SMC Flex Motor Controller Overview

The 150-F251NBD is a 3-phase SMC Flex soft starter motor controller. It supports 200–460V AC input, 251A rated output, and provides safe motor startup. Author: Powergear X Automation.

Technical Specifications

• Manufacturer: Allen-Bradley
• Product Line: SMC-Flex
• Part Number: 150-F251NBD
• Controller rating: 251 Amps, 200 HP at 460V AC
• Input line voltage: 200–460V AC, 3-phase, 50/60 Hz
• Control voltage: 100–240V AC (for 5–480A units)
• Rated output power: 75–250 kW
• SCR bypass/run contactor included
• Ground fault detection capability
• Programmable 1 NO and 1 NC contact
• Enclosure type: Open
• Weight: 68 lbs (30.84 kg)
• Operating temperature: 0–50°C
• Power loss: approx. 120 W
• Mounting requires airflow or optional cooling fan

Product Highlights

• Soft starter protects motors from high torque and current spikes
• Built-in electronic overload protection
• Ground fault alarm and trip options for safety
• Flexible programmable contacts for integration
• Supports 3-phase machinery up to 250 HP
• Compact design for panel or cabinet installation
• Durable solid-state design for long life

Applications

• Pumps, compressors, and fans
• Industrial conveyors
• Machine tools with soft start requirements
• High-torque motor systems
• Energy-efficient motor control

Shipping & Warranty

• Warranty: 12 months
• Shipping via FedEx, UPS, DHL
• Secure foam packaging for safe transit

Packing List

• 1 × Allen-Bradley 150-F251NBD Motor Controller
• 1 × Quick Start Guide
• 1 × Mounting Hardware Set

FAQ

• Q: Can this controller handle full 251A continuously?
  A: Yes, as long as operating temperature stays below 50°C and proper ventilation is provided.
• Q: Is external ground fault sensor required?
  A: Yes, a sensor is needed to enable ground fault trip or alarm.
• Q: How do I wire the NO and NC contacts?
  A: Connect according to your control circuit diagram; check polarity and ratings.
• Q: Can it control motors below 75 HP?
  A: Yes, adjust parameters to match motor ratings and prevent nuisance trips.
• Q: Does it require an enclosure fan?
  A: Optional, but recommended for high ambient temperatures or continuous operation.

Contact Information

• Email: sales@powergearx.com
• WhatsApp: +86 18030005825

Long-Tail Keywords / TAGs

• Allen-Bradley 150-F251NBD motor controller
• 150-F251NBD SMC Flex soft starter
• 3-phase motor starter 251A
• Industrial soft start controller
• Allen-Bradley SMC-Flex drives

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