MCCB for line protection — 4-pole, 32 A, high interrupting capacity
The Siemens SENTRON 3VA1132-4ED46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 32 A continuous at 40 °C, with a TM210 thermal-magnetic trip unit.
Breaking capacity across voltages — selectivity planning
Interrupting capacity drops as system voltage rises: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. For a 480 V panel (common in North America) the relevant figure is the 440 V rating of 52.5 kA — enough for most service-entrance and feeder applications.
Above that it derates to 31 A at 55–60 °C and 30 A at 65–70 °C. In a sealed, uncooled enclosure near other heat sources, account for the derating — the 30 A at 70 °C figure is the floor.
Panel integration — dimensions and mounting
The 3VA1132-4ED46-0AA0 measures 130 mm high, 101.6 mm wide, and 70 mm deep.