Siemens SENTRON 3VA1112-4EF36-0HA0 — 125 A MCCB with Shunt Trip
At 415 V the interrupting rating drops to 75.6 kA, at 440 V to 52.5 kA, and at 500 V and 690 V it holds at 11.9 kA. The 800 V rated insulation voltage (Ui) tells you the breaker's internal clearance is designed for 800 V systems, but the actual breaking numbers above 500 V are modest — this is a 240/415 V workhorse, not a 690 V main. The thermal-magnetic release is a TM240, meaning the thermal element is calibrated for a 240 A frame, but the actual continuous current you can pull depends on the ambient derating curve: it carries 125 A up to 50 °C, then tapers to 114 A at 70 °C.
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard SENTRON 3VA footprint that drops into the same panel cutout as other 3VA frame sizes. The shunt trip is the only auxiliary release; if you need undervoltage protection or a separate alarm contact, you'll add those as external accessories.