The Siemens 3VA1112-1AA32-0CH0 is a SENTRON 3VA1 IEC frame 160 switch disconnector in MCCB design, rated 125 A continuous (Iu) with a 3-pole configuration. It provides no overload or short-circuit protection — this is a disconnect-only device, intended for isolation and switching under load where the upstream protection handles fault clearing. The 125 A continuous rating carries full load current at 70 °C max operating ambient.
Built-in undervoltage release and auxiliary contacts
No leading contact on the UVR, so verify coil suppression if integrating with a PLC output. Auxiliary contact complement: 2 form-C auxiliary switches (HQ type) plus 1 trip alarm switch, giving three CO contacts total. The trip alarm signals the disconnector's open state independently of the aux switches — useful for remote status monitoring on a conveyor line or pump panel.
Front terminals for busbar connection; the nut keeper kit (included per the description) simplifies torque-down on the busbar lugs without losing hardware inside the panel. Not for washdown or outdoor standalone use without an enclosure.