What this MCCB carries and what it protects
The Siemens SENTRON 3VA1132-6EF36-0DC0 is a 3-pole molded case circuit breaker rated 32 A at 40 °C, designed for line protection in distribution panels. Its 220 kA breaking capacity at 240 V means it can safely interrupt a fault current up to that level without the arc flashing over — critical for high-fault installations like transformer secondaries or large motor control centers where the available short-circuit current is substantial. That 220 kA figure drops to 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 / 690 V, so the voltage class of your system dictates the actual SCCR you get. This breaker includes an undervoltage release (UVR) as standard — the coil drops the trip mechanism if supply voltage falls below a threshold, which is a common requirement for emergency-stop circuits and safety interlocks in conveyor or machine-tool panels. It ships with two auxiliary switches (HQ design) for status feedback to a PLC or indication lamp. Rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V class systems with headroom. The 70 mm depth, 76.2 mm width, and 130 mm height fit the standard SENTRON 3VA footprint — it bolts into the same bus-bar and mounting pattern as other 3VA frame sizes, making a swap or upgrade straightforward without re-drilling the panel.
Thermal derating — what the numbers mean for a loaded panel
Rated current holds at 32 A from 40 °C through 50 °C, then drops to 31 A at 55 °C and 60 °C, and 30 A at 65 °C and 70 °C. That's a gentle derating curve — only 2 A lost over a 30 °C rise — so you can pack it into a warm enclosure without a big capacity penalty. The maximum power loss is 13.1 W, which is modest for a 32 A MCCB; still, if you're stacking multiple breakers in a sealed panel, sum the losses and check the internal temperature rise against the derating table. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. That covers most indoor industrial environments and unheated warehouses.