Siemens 3RV1902-1DF0 Auxiliary Shunt Release is a shunt-trip accessory for the 3RV2 line of molded‑case circuit breakers (Size S00). It accepts a control voltage of 90-110 V AC at 50/60 Hz and, when energized, triggers a trip to isolate the load; the timing specification includes a 5-second ON period within a 70-190 V AC window, with a 100% ON period at the same voltage range, enabling predictable remote disconnection in safety circuits. This accessory is commonly used in industrial machines, safety interlocks, and remote-disconnect applications where fast, reliable power isolation is required.
