The Siemens SENTRON 3VA1112-1AA36-0HH0 is a 3-pole switch disconnector in an MCCB-style housing, rated for 125 A continuous at 40 °C through 70 °C ambient — no derating needed across that span. It operates at 690 V AC or 500 V DC, with an 800 V rated insulation voltage. Front terminal connections keep wiring accessible in a panel.
The 3VA1 frame measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling.
Mechanical service life is rated at 15,000 operating cycles typical — adequate for frequent switching in distribution or machine disconnect applications. The shunt trip release allows remote emergency-off or interlock tripping without an undervoltage release.