What it is and what it does
The Siemens 3VA1132-3EF32-0HA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — the primary feeder or branch breaker in a distribution panel, sized for a 32 A continuous load at 40 °C ambient. Three poles, thermal-magnetic trip (TM240 release), with an integral shunt trip (STL) for remote or emergency-off tripping via a separate control voltage. Breaking capacity runs from 75.6 kA at 240 VAC down to 11.9 kA at 690 VAC — enough for most industrial service-entrance or high-fault panelboard applications, provided the available fault current at the point of installation stays within those curves.
Ratings and what they mean for fit
Rated 32 A continuous at 40 °C, and it holds that rating up to 50 °C without derating — above that it steps down to 31 A at 55 °C and 30 A at 70 °C. If your panel ambient runs hot, factor the 55 °C or 70 °C column into the load calculation. Rated insulation voltage is 800 V, so the breaker is electrically rated for 690 VAC line-to-line systems (the typical upper bound for industrial networks). The 11.9 kA at 690 V is the interrupting limit at that voltage. The shunt trip (STL) auxiliary release lets a remote pushbutton, PLC output, or safety relay open the breaker independently of the thermal-magnetic trip mechanism. No undervoltage release on this variant — if you need UVR protection, that's a different order code. Power loss at full load is 10.6 W — negligible for most enclosures, but worth noting if the panel is densely packed and ambient is already near the 70 °C operating max.
Physical fit and panel integration
Mounts on a DIN rail or directly to a panel backplate. Width is 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in) — a standard 3-pole MCCB footprint that fits most SENTRON distribution boards and third-party enclosures with the same cutout.