MCCB for line protection — 32 A continuous, 75.6 kA interrupting
The Siemens SENTRON 3VA1132-3EF32-0AD0 is a 3-pole molded case circuit breaker (MCCB) rated for 32 A continuous current at 40 °C ambient, with a TM240 thermal-magnetic overcurrent release. It delivers 75.6 kA interrupting capacity at 240 V AC, stepping down to 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500/690 V — covering the full low-voltage distribution range without a separate current-limiting fuse upstream. Rated insulation voltage is 800 V, and the breaker maintains its 32 A rating through 50 °C, then derates to 30 A at 70 °C — a thermal curve that holds up to the steam and heat near a curing press without nuisance tripping.
The breaker measures 70 mm deep, 76.2 mm wide, and 130 mm high — a standard SENTRON 3VA frame footprint that drops into existing MCCB panel layouts without re-drilling or busbar rework.