The Siemens SENTRON 3VA1112-6EF32-0AE0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 125 A at 40 °C, with a TM240 thermal-magnetic overcurrent release.
At 440 V the interrupting rating drops to 75.6 kA, and at 690 V to 17 kA — the curve a site electrical engineer needs for coordination studies. The continuous current holds at 125 A through 50 °C, then derates linearly: 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C.
Physical fit and auxiliary contacts
The case measures 76.2 mm wide, 130 mm high, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. The IP40 front protection is typical for a switchboard interior; no washdown rating.