Siemens 3VA1050-3ED36-0BH0 — SENTRON MCCB for Line Protection
It carries a 75.6 kA interrupting capacity at 240 VAC, stepping down to 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V — giving you the selectivity headroom to coordinate downstream breakers without cascading faults upstream.
Above that, it drops linearly to 45 A at 70 °C (the maximum operating temperature). At 690 V the same breaker still interrupts 7.5 kA — enough for most motor branch circuits but not for high-fault 690 V mains. The UVR drops the breaker when control voltage falls below the dropout threshold — standard for emergency-stop circuits that need a guaranteed open on power loss. Power loss is 17.1 W at rated load. That's the heat the breaker dumps into the enclosure — factor it into your panel thermal budget if you're stacking multiple MCCBs in a sealed cabinet.
The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. The 3-pole block occupies three modular 25.4 mm units on the rail.