Siemens 3RV1041-4JA10 Soft Starter For AC Motors

Siemens 3RV1041-4JA10 is a DIN-rail mounted motor protection circuit breaker (MPCB) from the SIRIUS 3RV1 family, designed to guard AC motors against overloads and short circuits, not a soft-start device. It provides an adjustable overload trip range of 45–63 A (FLA) with Class 10 thermal protection, enabling fast, reliable protection for medium to large motors in low‑voltage circuits. The device is sized as Size S3, features screw terminals for dependable wiring, and is delivered without auxiliary contacts. It offers a short‑circuit current rating up to 65 kA at 480 V, making it suitable for panel installations where high fault currents could occur. Mounted on standard DIN rails inside control panels, the 3RV1041-4JA10 is used to protect motors in low‑voltage motor circuits and pairs with compatible enclosure and wiring practices for safe operation.