Siemens 3RV1042-4FA10 Manual Motor Starter 28-40A

Siemens 3RV1042-4FA10 is a SIRIUS motor-protection circuit-breaker (manual motor starter) in size S3, designed to protect and start small to mid-size motors with an overload setting range of 28–40 A. It provides a thermomagnetic overload release in the 28–40 A range (A-release) and a short-circuit release rated to 520 A (N-release), enabling reliable motor protection with a high short-circuit carrying capability up to 100 kA. The device uses screw-terminal connections, includes an auxiliary switch option, and has a continuous current rating of 40 A with IP20 enclosure protection, making it suitable for indoor control-panel mounting in industrial environments. This part is intended for motor protection applications within low-voltage circuits, offering both overload and short-circuit protection in a compact industrial protective device.