The Siemens SENTRON 3VA1110-3EF32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 100 A continuously at 40 °C ambient. Breaking capacity hits 75.6 kA at 240 V, tapering to 11.9 kA at 690 V — enough for most industrial distribution panels downstream of a transformer. The TM240 thermal-magnetic release handles overload and short-circuit without an external trip unit.
Breaking capacity and derating
The 75.6 kA at 240 V is the headline number, but the curve matters: 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. If your panel feeds a 480 V bus, the 32 kA figure governs — that still covers most commercial and light industrial fault levels. Thermal derating stays flat at 100 A from 40 °C to 50 °C, then drops to 91 A at 70 °C. The 25 W maximum power loss is manageable in a standard enclosure but worth checking if the panel is densely packed.
Mounting and integration
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. Rated insulation voltage is 800 V, so it's comfortable on 690 V systems. The built-in auxiliary switch pack (2 HP) provides status feedback without a separate accessory module. No undervoltage release or shunt trip on this variant — if you need remote tripping, that's a different order code.