Allen Bradley 150-C251NBR SMC-3 Soft Starter – 75kW (251A) 200–480V, 3-Phase, 24V AC/DC Control, Open Type Motor Controller

The Allen Bradley 150-C251NBR is a heavy-duty SMC-3 soft starter designed for smooth and controlled motor acceleration in demanding industrial applications. With a high current rating of 251A and support for 200–480V 3-phase operation, this unit can reliably start motors up to 75kW at 400V, reducing high inrush current and minimizing stress on mechanical drive systems.

Featuring a 24V AC/DC control input, 3-wire control logic, and integrated electronic overload protection, the 150-C251NBR is suitable for heavy-duty pumping systems, conveyors, crushers, agitators, blowers, material handling equipment, and continuous-process industrial environments where reliability and smooth motor control are essential.

Technical Specifications

Model: 150-C251NBR Allen Bradley
Brand: Allen Bradley
Series: SMC-3 Soft Starters
Type: Solid-State 3-Wire Soft Starter
Rated Motor Power: 75 kW (at 400 V)
Rated Operating Current: 251 A
Rated Operating Voltage (Ue): 200–480 V AC, 3-Phase
Control Voltage: 24 V AC/DC
Frequency: 50/60 Hz
Ideal For: Pumps, conveyors, crushers, mixers, blowers, and continuous-duty industrial machinery

Electrical Specifications

• Voltage Range: 200–480 V AC, 3-Phase
• Rated Current: 251 A continuous
• Motor Rating: 75 kW at 400 V
• Control Voltage: 24 V AC/DC
• Control Interface: 3-wire Start/Stop logic
• Integrated Motor Protection: Electronic motor overload relay
• Additional Protection: Undervoltage, phase loss, jam/stall detection
• Soft Start/Stop Ramp: Adjustable acceleration and deceleration profiles

Mechanical Specifications

• Mounting Style: Panel-mount (Open Type)
• Frame Design: Industrial open-frame chassis for enclosure integration
• Cooling: Natural or forced ventilation within the control cabinet
• Power Terminals: Heavy-duty screw lug connectors
• Protection Rating: IP2X (when installed in suitable enclosure)

Environmental Specifications

• Maximum Operating Temperature: 50°C without derating
• Humidity: 5–95% RH, non-condensing
• Altitude: Up to 1,000 m without derating
• Application Category: Heavy-duty industrial environments

Compliance & Certifications

• CE Marked: Yes
• UL / cUL Listed: Yes
• RoHS Compliant: Yes
• Standards: IEC / EN 60947-4-2 and IEC / EN 60947-1

Key Features & Benefits

✅ High Current Capability. Supports continuous-duty loads up to 251A.

✅ Smooth Motor Starting. Reduces shock loading and extends mechanical lifespan.

✅ Integrated Electronic Overload Protection. Eliminates need for external overload devices.

✅ 24V Control Interface. Simple connection to PLCs and automation panels.

✅ Industrial Grade Reliability. Designed for harsh and continuous service environments.

✅ Proven Allen Bradley Performance. Trusted globally in critical applications.

📦 Order the Allen Bradley 150-C251NBR from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 150-C251NBR prices, with fast delivery and full technical support across the UK and Europe.

Check stock now or request a quote.

Start stronger. Protect better. Allen Bradley engineered — only at Drive Outlet Megastore.