32 A MCCB with TM240 release — panel fit and breaking headroom
The Siemens SENTRON 3VA1132-3EF46-0AA0 is a 4-pole molded case circuit breaker rated for 32 A at 40 °C ambient, carrying the full 32 A through 50 °C before a slight derate to 31 A at 55 °C and 30 A at 70 °C — so it holds its nameplate rating across most common panel interior temperatures without a sizing penalty. Breaking capacity hits 75.6 kA at 240 V, drops to 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500 V or 690 V — that 75.6 kA figure at 240 V is the headline number for high-fault industrial panels on 240 V delta or 240/120 V center-tap services. The TM240 thermal-magnetic release is tuned for line-protection duty (cable and busbar protection), not motor-starting curves; the 800 V rated insulation voltage gives headroom for 480/277 V and 600 V systems. Front IP40 rating suits it for enclosed panel mounting — not for washdown or outdoor exposure.
Dimensions and integration — panel footprint
At 70 mm deep, 101.6 mm wide, and 130 mm tall, the 3VA1132-3EF46-0AA0 fits standard 4-pole MCCB panel cutouts in the SENTRON family — the same footprint as other 3VA 4-pole units, so a panel laid out for a 3VA1110-5ED32-0AA0 will accept this breaker without rewiring the bus or drilling new mounting holes.
Key ratings at a glance
Rated current: 32 A continuous at 40 °C ambient, with minimal derating up to 70 °C. Breaking capacity: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, 11.9 kA at 500 V and 690 V. Number of poles: 4. Overcurrent release: TM240 (thermal-magnetic, line protection). Rated insulation voltage: 800 V. Power loss: 10.6 W maximum. Operating temperature range: -25 °C to 70 °C. Storage: -40 °C to 80 °C. Front protection: IP40. No undervoltage release, no communication function, no ground-fault monitoring, no trip indicator, no voltage trigger — it is a straight thermal-magnetic line-protection breaker.