140M MPCBs
Allen-Bradley 140M Motor Circuit Protectors (MPCBs)
Allen-Bradley 140M motor circuit protectors (MPCBs) are designed to provide compact and reliable protection for motors and branch circuits in industrial automation systems. These devices combine switching capability with short-circuit and overload protection, making them a common choice for motor starters and control panel designs used in manufacturing and processing facilities.
The 140M series is widely used in motor control centers (MCCs) and OEM machinery where dependable motor protection and simplified maintenance are required. Matching the correct MPCB to the motor’s full-load current is essential to ensure proper protection and safe operation. In addition to current range, engineers typically verify frame size, number of poles, voltage rating, and breaking capacity when selecting a replacement device.
Typical applications
- Motor control centers (MCCs)
- Industrial pumps, compressors, and fans
- Conveyors and material handling equipment
- Packaging and manufacturing machinery
- OEM automation systems and control panels
Key selection factors
- Adjustable current range matching motor full-load amps (FLA)
- Frame size and pole configuration
- Voltage rating and short-circuit protection requirements
- Compatibility with motor starters and panel layout
- Accessory support such as auxiliary contacts or signaling modules
Related categories
If you are replacing an existing 140M motor circuit protector, confirm the motor full-load current, adjustable trip range, voltage rating, and accessory compatibility before installation to ensure proper system protection.