Siemens 3RV2031-4WA15 Molded Case Circuit Breaker

Siemens 3RV2031-4WA15 is a SIRIUS 3RV2 molded‑case motor protection circuit‑breaker (MPCB) in size S2, intended to protect and switch three‑phase motors up to 690 V. It combines a thermal overload release (Class 10) with short‑circuit protection and an integrated auxiliary contact (1 NO + 1 NC) for signaling in control circuits. The WA15 variant is listed with a nominal current rating around 52 A, and it uses screw terminals for secure wiring. The device is a 3‑pole unit and is capable of interrupting up to 65 kA at 400 V AC (30 kA at 240 V AC; other voltages have different ratings). Front protection is IP20 and terminal protection IP00, making it suitable for panel mounting in industrial environments. This compact MPCB provides motor protection with integrated signaling, enabling reliable protection and control in applications such as industrial control panels, conveyors, and pumps where a single device can both protect a motor and provide a switchable signal for the control system.