The Siemens SENTRON 3VA1132-4EF32-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for 32 A continuous current at 40 °C, with a thermal-magnetic overcurrent release (TM240). Its interrupting capacity hits 121 kA at 240 V AC and 75.6 kA at 415 V AC — high enough for most distribution and motor branch circuits in industrial panels. The shunt trip release (STL) allows remote tripping via a control voltage, which simplifies emergency-stop integration or load-shedding schemes.
Breaking capacity and thermal performance
The 121 kA at 240 V and 75.6 kA at 415 V mean this breaker can safely clear high-fault currents typical near large transformers or busway taps — no need for upstream current-limiting fuses in most panels. At 690 V the capacity drops to 11.9 kA, still adequate for motor circuits with dedicated short-circuit protection. The thermal derating is shallow: it holds 32 A from 40 °C to 50 °C, then drops only to 30 A at 70 °C. That gives headroom in warm enclosures without oversizing.
Panel fit and integration
The 3VA1132-4EF32-0JA0 measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or screw-mount panel layouts. The shunt trip release (STL) occupies the auxiliary slot, so no extra external relay is needed for remote trip. Rated insulation voltage is 800 V, which covers 480 V and 600 V class systems with margin.