Siemens 3VF9221-1KC10 is a shunt-trip auxiliary switch accessory for Siemens 3VF2 molded‑case circuit breakers, pairing a remote trip function with a single changeover auxiliary contact. The module operates on 12 V DC and provides one changeover (SPDT) contact for signaling or control circuits, designed to mount on the 3VF2 family. This accessory enables remote tripping and status signaling within panels that employ Siemens 3VF2 devices.
