140MP-A3E-B40

Overview of Allen Bradley 140MP-A3E-B40

The Allen Bradley 140MP-A3E-B40 is a Motor Protection Circuit Breaker (MPCB) designed to provide reliable protection for motors against overload and short-circuit conditions. It is part of the Bulletin 140MP family, known for their thermomagnetic trip units that combine adjustable thermal and fixed magnetic protection. The 140MP-A3E-B40 model features a current adjustment range of 2.5 to 4 amperes, suitable for small to medium motor applications. It supports motor protection up to 690V and offers excellent short-circuit interrupting capacity of up to 18 kA at 480/600 Volts. The product is suitable for manual motor control, including motor start-stop functions and fault protection, making it ideal for robust industrial environments. Its compact dimensions and IP2X degree of protection ensure it can fit well into various control panels while maintaining high safety standards.

Key Features of Allen Bradley 140MP-A3E-B40

• Current adjustment range from 2.5 to 4 A for flexible motor protection
• Thermomagnetic trip unit combines adjustable thermal and fixed magnetic protection
• Rated operational voltage up to 690V, suitable for various industrial systems
• Short-circuit interrupting capacity of 18 kA at 480/600V ensures high fault tolerance
• Compact frame size (Frame A) with 3 poles and screw terminal connections
• Manual motor starter functionality with a turn-handle control element
• Compatible with Allen Bradley Bulletin 100-C and 100-K contactors for integrated motor starters
• Degree of protection IP2X for safety against accidental contact
• Lightweight design at approximately 0.28 kg
• Conforms to UL listed manual motor controller standards and suitable for Group installation

Technical Specs of 140MP-A3E-B40

Parameter	Specification
Rated Current Range	2.5 to 4 A
Rated Operation Voltage	Up to 690V
Short-Circuit Breaking Capacity	18 kA @ 480/600 V
Poles	3
Degree of Protection	IP2X
Control Type	Turn handle
Connection Type	Screw
Frame Size	Frame A
Dimensions (HxWxD)	90 x 45 x 85.5 mm
Weight	0.28 kg
Standards	UL Listed as Manual Motor Controller

Applications / Use Case

The Allen Bradley 140MP-A3E-B40 is ideal for motor control and protection in industrial automation setups. It is commonly used in manufacturing plants, assembly lines, HVAC systems, and pumping stations where reliable motor protection is critical. Its adjustable current range allows for precise overload protection for various motor sizes. This device is well-suited for manual motor starter applications, providing quick and dependable motor stop-start control coupled with short-circuit and overload safety. It is compatible with other Allen Bradley contactors for easy integration into motor starter combinations. Maintenance teams often prefer this model for easy installation and dependable operation in demanding environments. The circuit breaker's construction ensures protection while reducing downtime caused by motor faults or short-circuit events, making it a critical component in ensuring safe, continuous industrial processes.

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