The Siemens SENTRON 3VA1112-1AA36-0HA0 is a 3-pole switch disconnector in MCCB design, rated at 125 A continuously across the full operating temperature range from 40 °C to 70 °C — no derating needed. It is built on the 160 A frame and intended for isolation and switching of loads where overload or short-circuit protection is handled upstream or by a separate device.
The 500 V DC rating allows use in some DC bus or battery circuits. The trip indicator is absent, so the handle position is the only visual state cue. For applications requiring a remote status signal, an external auxiliary switch block (optional motor drive slot available) must be added. The front terminal connection accepts lug-type conductors, which is the standard for panel feeder circuits.
The device measures 130 mm high, 76.2 mm wide, and 70 mm deep — a compact footprint for a 125 A disconnect. The front-terminal lug connection allows straightforward bus-bar or cable landing.