Overview
The Allen-Bradley 150-C108NBD is a solid-state smart motor controller (SMC-3) engineered for soft-start control of 3-phase motors. Rated for 108 A output at 200–460V AC (50/60 Hz), this Series B controller provides built-in electronic overload protection and five flexible start/stop modes, making it ideal for applications requiring controlled motor acceleration and reduced inrush current.
Key Features
- Five Start/Stop Modes: Soft start, current limiting, kickstart, coast-to-stop, and soft-stop functions for diverse application requirements.
- Built-In Electronic Overload Protection: SCR bypass contactor on all three phases eliminates the need for external thermal overloads.
- Compact Design: Open-frame enclosure with smaller footprint than traditional soft starters, saving panel space.
- Wide Control Voltage Range: 100–240V AC/DC control input for flexible wiring configurations.
- Motor Compatibility: Works with delta-connected and line-connected 3-phase motors.
Technical Specifications
- Output Current Rating: 108 A
- Input Line Voltage: 200–460V AC, 3-phase, 50/60 Hz
- Control Voltage: 100–240V AC/DC
- Horsepower Range: 20–30 hp (480V)
- Enclosure Type: Open
- Communication: One DPI (DeviceNet Product Interface) port
- Operating Temperature: 0–50°C
- Storage Temperature: −25 to 85°C
- Dimensions: 196.4 × 443.7 × 205.2 mm
- Weight: 31 lbs
- Certifications: UL, CUL, CE, CSA, C-TICK, CCC, GOST, KC
- Series: Series B SMC-3
Typical Applications
The 150-C108NBD is commonly used to control and protect 3-phase motors in industrial equipment including:
- Centrifugal pumps and vertical turbine pumps
- Industrial air compressors and chillers
- Material handling conveyors
- Crusher and mill drives
- Any application requiring soft-start to reduce mechanical shock and electrical stress
Compatibility & Replacements
Compatible With
- 3-phase AC induction motors (20–30 hp range at 480V)
- Delta-connected and line-connected motor configurations
- Systems requiring DeviceNet communication (via DPI port)
- Panels with 100–240V AC or DC control power availability
- Soft-start applications requiring electronic overload protection
Replaces / Drop-In Replacement For
- 150-C108FAD (24V AC/DC variant)
- 150-C108NBR (alternative Series B configuration)
- Legacy mechanical soft starters and electromechanical reduced-voltage controllers in the same amp/voltage class
Works With
- Allen-Bradley Bulletin 150 SMC-3 soft-start ecosystem
- DeviceNet communication protocol (DPI interface)
- Systems using electronic motor protection and soft-start acceleration
- Industrial control panels with 200–460V 3-phase motor branch circuits
