The SENTRON 3VM1332-4ED42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying 320 A continuously at 40 °C with no derating needed up to 50 °C. At 240 V it interrupts 121 kA — that's the headline SCCR figure for this frame.
At 415 V and 440 V it still holds 76 kA; at 500 V it drops to 53 kA. The SCCR at each voltage level determines whether this breaker alone satisfies the fault rating for the whole panel or you need upstream coordination. Above 50 °C it steps down: 313 A at 55 °C, 306 A at 60 °C, down to 292 A at 70 °C.
The 3VM1332-4ED42-0AA0 measures 248 mm high, 184 mm wide, and 110 mm deep — a 4-pole frame that fits standard distribution panel cutouts. In a sealed panel with multiple breakers, factor that into your thermal budget or you'll hit the derating curve sooner than the ambient temperature alone suggests.