Allen Bradley 150-F251NBD SMCFlex SoftStart 251A

The AB 150-F251NBD is a heavy-duty SMC-Flex solid-state soft starter designed for high-power 3-phase motor applications. Rated for 251 A and up to 132 kW at 400V AC, this open-type controller supports a wide input voltage range (200…480V AC) and is equipped with 100–240V AC control voltage.

The 150-F251NBD includes integrated motor overload protection, advanced start/stop profiles, and built-in diagnostics, making it ideal for pumps, compressors, conveyors, and fans in demanding industrial settings.

Technical Specifications

Model: 150F251NBD
Series: SMC-Flex
Type: Solid-State Soft Starter
Rated Operating Current (Ie): 251 A @ 40 °C
Rated Power (Motor, Standard Duty): 132 kW @ 400 V / 200 HP @ 460 V
Rated Operating Voltage (Ue): 200…480 V AC
Control Voltage (Us): 100…240 V AC
Voltage Type for Actuation: AC
Start/Stop Modes: Standard, Soft Start, Kickstart, Current Limit, Linear Speed, Linear Torque
Overload Protection: Integrated, adjustable

Electrical Specifications

Input Voltage Range: 200…480 V AC
Control Voltage Range: 100…240 V AC
Motor Protection: Electronic overload (Class 10, 15, 20, 30)
Bypass Contactor: Internal (reduces heat and energy consumption after startup)
Phase Loss Protection: Yes
Overtemperature Protection: Yes
Current Imbalance Monitoring: Yes
Fault Diagnostics: Built-in fault logging and status indication

Mechanical Specifications

Enclosure Type: Open (IP2X)
Mounting Type: Panel mount
Cooling Method: Integrated fan cooling
Housing Material: Industrial-grade thermoplastic
Height: Approx. 445 mm
Width: Approx. 226 mm
Depth: Approx. 210 mm
Weight: Approx. 16 kg
Terminal Type: Screw-type power terminals

Environmental Specifications

IP Rating: IP2X
Operating Temperature: –5…+50 °C (without derating)
Storage Temperature: –40…+85 °C
Relative Humidity: 5% to 95% non-condensing
Vibration Resistance: 2.5 g @ 10–500 Hz
Shock Resistance: 15 g
Pollution Degree: 2
Altitude: Up to 1000 m without derating

Compliance & Certifications

Certifications: CE, UL, c-UL, CSA, RoHS
Standards Met:
– EN/IEC 60947-4-2
– EN/IEC 60947-1
– EN 60204-1 (Electrical safety)
Application Areas: Industrial motor control, HVAC, water pumping, heavy-duty conveyors

Key Features & Benefits

✅ 251 A Heavy-Duty Soft Start – Handles large 3-phase motors up to 132 kW with ease

✅ Wide Input & Control Voltage Range – Operates from 200–480V AC with 100–240V AC control

✅ Integrated Overload & Diagnostic Protection – Enhances safety and system uptime

✅ Internal Bypass Contactor – Reduces thermal losses during normal operation

✅ Advanced Start/Stop Profiles – Customizable for precise torque and speed control

📦 Order the Allen Bradley 150-F251NBD from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 150-F251NBD prices. This high-performance SMC-Flex soft starter is ideal for controlling high-inertia loads while minimizing mechanical wear and electrical stress—available for order through our expert industrial supply network.

Click here to request a quote or check availability

Drive Outlet Megastore – your trusted source for Allen Bradley soft starters and high-capacity motor control solutions.