The SENTRON 3VA1112-1AA36-0AG0 is a 3-pole switch disconnector in a molded-case circuit breaker (MCCB) form factor, rated 125 A continuous across the full operating temperature range from 40 °C to 70 °C with no derating. It operates at 690 V AC or 500 V DC, making it suitable for line-side isolation in 400 V and 690 V industrial networks.
That simplifies panel sizing: if your load is 125 A or less at any ambient up to 70 °C, this switch disconnector handles it without a temperature correction factor. The 690 V AC rating covers both standard 400 V distribution and 690 V motor circuits common in heavy industrial and mining installations. This is a switch disconnector only — no overload or short-circuit protection (SD100 designation). It provides visible isolation for safe maintenance but requires upstream overcurrent protection.
Integration and deployment
The 76.2 mm width and 70 mm depth match the standard 3VA frame 160 footprint — drops into the same DIN-rail or panel-mount cutout as other 3VA1112 variants. The front-terminal connection keeps wiring accessible without removing the unit from the panel.