Switch disconnector in MCCB design — 125 A, no overload protection
The Siemens 3VA1112-1AA36-0CH0 is a SENTRON 3VA1 switch disconnector in MCCB design, rated 125 A continuous across the full operating temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. This is a pure disconnector — no overload or short-circuit protection built in.
Undervoltage release and auxiliary switch complement
The auxiliary contact block carries three CO contacts. No communication function or leading-contact UVR option on this variant. If motor-drive remote operation is needed later, the product extension supports an optional motor drive.
Dimensions, mounting, and environmental limits
Width 76.2 mm, height 130 mm, depth 70 mm. Front terminal connection accepts clamp-type conductors for the main current circuit. Maximum power loss 38 W.