SENTRON 3VA1132-4EF32-0AB0 — molded case circuit breaker for line protection
The Siemens SENTRON 3VA1132-4EF32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection duty. It carries a continuous current of 32 A up to 40 °C, with thermal derating that holds 32 A through 50 °C and steps down to 30 A at 70 °C — a flat thermal curve that simplifies panel sizing in warm enclosures. Breaking capacity is the headline: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Those numbers mean this breaker can sit upstream of a high-fault panel without cascading — the 121 kA at 240 V covers most North American 277/480 V distribution scenarios where the line-to-neutral fault is the worst case.
Physical fit and panel integration
Footprint: 76.2 mm wide (3 in), 130 mm tall (5.12 in), 70 mm deep (2.76 in). The 76.2 mm width is a standard 3-pole MCCB module — it occupies three 25.4 mm (1 in) mounting slots on a DIN rail or panel-mount adapter. Depth of 70 mm leaves clearance for rear-connected busbars and wiring gutters in a 200 mm deep enclosure.
Overcurrent release and auxiliary contacts
The TM240 overcurrent release is a thermal-magnetic type — thermal element for overload protection, magnetic trip for short-circuit. No undervoltage release, no ground-fault monitoring, no communication module on this variant. It ships with two auxiliary switches HP (high-performance) pre-installed, which simplifies ordering if you need status feedback to a PLC or annunciator.