What this MCCB carries and where it fits
The Siemens SENTRON 3VA1132-5EF32-0JH0 is a 3-pole molded case circuit breaker rated for 32 A continuous current, built for line protection duties in distribution panels and motor control centers. Its TM240 thermal-magnetic overcurrent release handles overloads and short-circuits without external power, and the integrated shunt trip (STL) allows remote tripping via a control signal — useful for emergency-off circuits or PLC-driven safety sequences. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V, so it can sit upstream of smaller breakers in a high-fault panel without needing a current-limiting fuse ahead of it. At 690 V the rating drops to 17 kA — still adequate for most 690 V motor branch circuits, but verify coordination with the downstream devices. The breaker carries 2 auxiliary contacts plus 1 trip alarm switch (HQ configuration), giving the PLC or BMS a dedicated signal that the breaker tripped on fault rather than being manually opened.
Panel fit and derating — what the numbers mean on a real bus
At 76.2 mm wide, 130 mm tall, and 70 mm deep, this MCCB fits standard SENTRON panel footprints and accepts busbar connectors from the 3VA accessory range. The IP40 front protection means it's fine inside a closed cabinet; no special gasketing needed for typical indoor switchgear. Rated continuous current holds at 32 A up to 50 °C ambient. Above that it derates gradually: 30.72 A at 55 °C, 30.08 A at 60 °C, 29.44 A at 65 °C, and 28.8 A at 70 °C. If the panel runs hot — near a drive cabinet or transformer — size the breaker for the actual ambient, not the nameplate. Mechanical endurance is rated at 15,000 operations.