SPMWHT541MD5WATMS2 is a Siemens 1100 Air Circuit Breaker. It is a solid-state trip unit designed to protect motor, motor control centers, feeders, and branch circuits from short-circuit faults. It features a reliable and durable torque design, high-speed and precise trip accuracy, and a wide range of settings for adjustable trip point. It also offers surge protection, current monitoring, diagnostic features, and event logging for remote monitoring and control.