Line protection breaker with TM220 release
The Siemens 3VA1132-5EE32-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a 32 A continuous rating at 40 °C through 50 °C, derating to 30 A at 70 °C, so the thermal curve stays predictable across a warm enclosure. The TM220 overcurrent release combines a thermal bimetal for overload and a magnetic coil for short-circuit — no electronic trip unit, no communication function, no undervoltage release. That keeps the part simple for standard feeder or branch protection where selectivity and coordination are set by the breaker's own time-current curve.
Breaking capacity across the voltage range
This 3-pole MCCB delivers 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. The steep drop above 440 V reflects the arc-extinction limits of the TM220 mechanism — at 690 V the 17 kA figure still covers most industrial transformer-fed fault levels, but verify the available fault current at the point of installation. The 187 kA at 240 V suits high-capacity 240/120 V split-phase or 240 V delta secondaries where upstream transformers can push large fault currents.
Panel integration and environmental limits
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that mounts directly onto a DIN rail or panel-mount base. Front-side protection is IP40, meaning tools or fingers won't contact live parts from the front, but the enclosure must keep the sides and rear clear of dust and moisture. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. The 10.6 W maximum power loss at rated current should be factored into enclosure thermal calculations, especially in a sealed panel with multiple breakers.