ABB MS116-20A Motor Protection Circuit Breaker

ABB MS116-20A Motor Protection Circuit Breaker is a compact 45 mm wide manual motor starter with integrated overload protection, designed for three-phase motors on 480 V/600 V AC systems and rated Ie 20 A. As part of ABB's MS116 family, it combines motor startup control with current-based protection, featuring an adjustable overload setting within the MS116 range of 20.0 to 25.0 A and a trip class of 10 A to balance protection with nuisance-trip resistance. The MS116-20A version is supplied with auxiliary contacts (A22) for signaling or interlocking in control circuits. This device is intended for panel mounting in motor control centers and can be used where compact protection with a simple on/off control is required, such as conveyors, fans, pumps, and other small to mid-size motors. Where needed, ABB catalog data shows the MS116 series supports a range of accessories, including auxiliary and signalling contacts, undervoltage releases, and shunt trips, allowing coordination with broader motor-control schemes while preserving the fundamental protection function of the MPCB.