Siemens 3RV1042-4EA10 Motor Protection Circuit Breaker

Siemens 3RV1042-4EA10 is a three‑pole motor protection circuit breaker (size S3) that combines overload protection with a built‑in short‑circuit release for motors, adjustable for a 22–32 A A‑release and a 416 A N‑release. Designed for motor protection in panels and MCCs, it features screw terminals, IP20 front protection, and an insulation voltage of 690 V with 6 kV impulse withstand. The device is rated for a 3‑pole circuit with increased breaking capacity and a Class 10 trip class, and it supports phase disturbance recognition while lacking an auxiliary switch and undervoltage release by default. Operating conditions span -20 to +70 C and up to 2,000 m altitude, with typical power loss around 20 W. Optional motor‑drive configurations are supported, making it suitable for small to medium motor loads in industrial automation, HVAC, pumps, and conveyor systems within Siemens’ Sirius 3RV family.