Siemens 3VA1112-6EF32-0CH0 — SENTRON MCCB, 125 A, 220 kA
The Siemens SENTRON 3VA1112-6EF32-0CH0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current Iu of 125 A at 40 °C, with the TM240 thermal-magnetic overcurrent release. Its interrupting capacity hits 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — figures that govern selectivity and fault-clearing in high-fault distribution panels.
The 125 A continuous rating holds flat from 40 °C through 50 °C — no derating needed in a warm panel — then drops to 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C. That thermal curve means the breaker can sit next to other heat sources without losing headroom until ambient crosses 50 °C. The TM240 release is a thermal-magnetic design — thermal element handles overloads, magnetic element handles short-circuits. This is a straightforward line-protection breaker, not a multifunction power monitor.
Deployment context — panel integration
The 3VA1112-6EF32-0CH0 mounts into a standard SENTRON 3VA frame footprint: 130 mm tall, 76.2 mm wide, 70 mm deep. The IP40 front means the breaker is splash-protected on the face but not sealed for washdown; keep it inside a panel with a door.