Siemens 3VA1180-4EF32-0HA0 SENTRON MCCB, 80 A, TM240, 3-Pole

The 3VA1180-4EF32-0HA0 is a Siemens SENTRON 3-pole molded case circuit breaker (MCCB) rated for 80 A continuous current Iu at 40 °C, with a TM240 thermal-magnetic overcurrent release. Its breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V — so it handles high available fault current at lower voltages, which is typical for a main breaker in a 480 V or 400 V distribution panel where the upstream transformer can deliver tens of kiloamps. The TM240 release means the thermal element is fixed at 80 A (the frame rating) and the magnetic pickup is set at 240 A ±20%, giving instantaneous trip on short-circuit currents above roughly 3x the frame. This is a line-protection version — no ground-fault module, no communication, no auxiliary contacts — so it's a straight feeder breaker for a distribution panel or a large motor branch circuit where you don't need remote status or ground-fault alarm. Temperature derating is minimal up to 50 °C (still 80 A), then drops to 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. In a sealed panel with internal heat rise, that 72 A at 70 °C is the real-world limit if the ambient around the breaker hits that level — plan your load accordingly.