Allen-Bradley 140MP-A3E-C20 Motor Circuit Breaker

Allen-Bradley 140MP-A3E-C20 Motor Protection Circuit Breaker is a Frame Size A MPCB/Manual Motor Starter from Rockwell Automation that provides motor overload protection and short-circuit protection for up to 690 V motors. It features an adjustable thermal current range of 16.0–20.0 A, a fixed magnetic trip, and a 3 kA interrupt rating at 690 V, 50 Hz. This device is designed for motor protection in industrial control panels and supports IEC 60947-4-1 type 2 coordination. The 140MP family combines thermal overload protection with short-circuit protection in a compact frame, and the A3E-C20 variant is specified for open ambient temperatures from −25 °C to +70 °C (with a derating to 20 A at 55 °C in some configurations). It is rated for 690 V, 50 Hz operation and is suitable for standard magnetic-trip configurations (magnetic trip fixed at 15 × I_e). The part number 140MP-A3E-C20 identifies this 16–20 A, 690 V MPCB, intended for use as a motor-protection device or manual motor starter in industrial motor-control applications.