The Siemens SENTRON 3VA1112-3EF32-0BH0 is a 3-pole molded case circuit breaker rated for 125 A continuous at 40 °C, with a full-current rating holding steady up to 50 °C before a gentle thermal derating curve kicks in — 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. That means for most panel environments below 50 °C, you get the full 125 A without headroom math. Interrupting capacity runs 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V — so the SCCR you can claim downstream depends on which voltage tap you're feeding. This is a line-protection design (not motor-protection curve), so it's the right call for feeder and distribution panels where you need selective coordination against downstream faults.
Auxiliary and alarm contacts
That gives you two independent status signals for PLC or SCADA input, plus a dedicated alarm contact that closes only on a fault trip — no need to add a separate shunt trip or auxiliary module for basic monitoring.
Footprint is 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB envelope that drops into most SENTRON 3VA panelboards and distribution blocks without re-drilling the mounting plate. Trip indicator is present, so a quick visual scan of the panel face tells you which breaker tripped without opening the door.