Siemens 3VF9222-1DC10 IEC Auxiliary Switch Bell Alarm

Siemens 3VF9222-1DC10 IEC Auxiliary Switch Bell Alarm is a two‑function accessory for Siemens 3VF2 series molded‑case circuit breakers, delivering one auxiliary contact and one alarm/bell contact that operate independently to signal breaker status and trigger audible signaling on state change. Designed to mount to the breaker’s IEC accessory interface, this unit integrates directly with 3VF2 assemblies for compact, panel‑level signaling. The 3VF9222-1DC10 part number identifies the specific alarm‑plus‑auxiliary switch configuration, commonly described in catalogs as an IEC auxiliary switch with a bell alarm. In practical use, it provides local audible indication and status feedback to control systems, PLCs, or alarm panels, enabling reliable signaling of trips or other state changes without loading the protected circuit thanks to its potential‑free contacts.