The Siemens 3VA1132-4EF36-0BA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying 32 A at 40 °C through three poles. Its interrupting capacity hits 121 kA at 240 VAC and 75.6 kA at 415 VAC — figures that tell you it handles high-fault utility feeds without cascading upstream. That's the spec that decides whether this breaker clears a bolted fault or welds shut.
Ratings and what they mean for fit
Rated current holds at 32 A from 40 °C through 50 °C, then derates to 31 A at 55 °C and 30 A at 70 °C — so in a warm panel you still get nearly full ampacity. Insulation voltage is rated 800 V, which covers 480/277 V and 600 V systems with headroom. The TM240 thermal-magnetic trip unit gives fixed thermal and magnetic settings; no adjustment dial, so the breaker is sized for a specific load and locked in. Breaking capacity across the voltage range: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA at 240 V is the headline number — it means this breaker can be applied downstream of a large transformer without needing a current-limiting fuse ahead of it, as long as the available fault current stays under that threshold.
Integration and panel fit
Three-pole footprint: 76.2 mm wide, 130 mm tall, 70 mm deep. That's a standard MCCB envelope — it fits existing SENTRON mounting plates and busbar systems without re-drilling. The undervoltage release (UVR) is built in, so the breaker drops out on loss of control voltage; verify coil voltage matches your control circuit before wiring.