circuit 140MP-A3E-B40 Motor Protection Circuit Breaker

circuit 140MP-A3E-B40 is a 3‑pole motor protection circuit breaker (frame size A) that provides magnetic short‑circuit protection with adjustable thermal overload for motors in the 2.5–4.0 A range. As part of the 140MP MPCB family, it can also function as a manual motor starter when paired with compatible Allen‑Bradley 100‑C or 100‑K contactors to form a two‑component motor starter, a common setup in industrial motor control. The unit delivers a 3 kA short‑circuit rating and is rated for up to 690 V AC operation, making it suitable for typical 480–690 V motor circuits, with UL/CSA listing for the 140MP protection lineup. This model is designed for straightforward integration with Rockwell Automation literature such as 140MP‑TD002/TD005 for precise electrical ratings and mounting guidelines, helping ensure correct fit with accessories and enclosures.