What this MCCB carries — and what it doesn't
The Siemens 3VA1132-5EF32-0BC0 is a SENTRON 3-pole molded case circuit breaker rated for 32 A continuous current, with a TM240 thermal-magnetic trip unit. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — so it handles high-fault utility feeds or transformer secondaries without cascading upstream. The 70 mm depth and 76.2 mm width fit standard SENTRON panel cutouts; the 130 mm height leaves room for busbar routing above the line terminals.
Thermal derating and ambient limits
The 32 A rating holds flat from 40 °C to 50 °C. At 55 °C it derates to 30.72 A, at 60 °C to 30.08 A, at 65 °C to 29.44 A, and at 70 °C to 28.8 A. If your panel ambient runs above 50 °C, size the load at the derated figure — the breaker won't nuisance-trip, but it also won't carry the full 32 A without heating the bimetal. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.
Auxiliary contacts and undervoltage release
This version ships with 2 auxiliary switches (HQ type) and an undervoltage release (UVR) as the auxiliary release design. The integrated auxiliary trip is order code 3VA9608-0BB11. No communication function, no phase failure detection, no ground fault monitoring, no voltage trigger, and no trip indicator. If you need remote status beyond the two aux contacts, you'll add an external module or a separate monitoring relay.
Panel fit and protection class
IP40 on the front — suitable for enclosed panel mounting where the breaker face is behind a door or cover. The 3-pole design with line protection (no ground fault) means it's a straight feeder or branch breaker for resistive, motor, or mixed loads within the derated current envelope. Rated insulation voltage is 800 V, so it's fine on 480/277 V and 600 V systems. Latching endurance is 15,000 operations.