What this MCCB carries and where it fits
The Siemens 3VA1132-5EF32-0CH0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection in distribution panels. It's a 3-pole unit rated 32 A continuously at 40 °C, and the thermal curve holds that rating flat through 50 °C before it starts a gentle derating — 31 A at 55 °C, 30 A at 70 °C. That means you can load it near nameplate in a warm enclosure without recalculating. Breaking capacity is the headline number here: 121 kA at 415 V AC. That's a serious fault-current rating for a 32 A frame — it'll interrupt a bolted fault on a large transformer secondary without the arc flashing over to the bus. At 240 V it's even higher at 187 kA, and it still holds 17 kA at 690 V. The rated insulation voltage is 800 V, so it's comfortable on 480/277 V or 600 V systems. It ships with an undervoltage release (UVR) built in — that's the -0CH0 suffix telling you the release is fitted. The auxiliary switch block carries 2 auxiliary switches plus 1 trip alarm switch (HQ type). That's enough for remote status on a PLC input and a separate alarm for trip events.
Panel fit and footprint
The case dimensions are 130 mm high, 76.2 mm wide, 70 mm deep. That's a standard 3-pole MCCB footprint — it'll drop onto a DIN rail or mount plate in a distribution board without surprises. The 76.2 mm width is three 25.4 mm pole pitches, so busbar spacing lines up with standard 3-phase risers. Power loss is 13.1 W maximum at rated load. That's modest for a 32 A MCCB — you won't need forced ventilation in a typical panel, but it's worth summing across multiple breakers in a dense enclosure to check internal temperature rise against the derating curve.