80 A MCCB with 220 kA interrupting capacity — selectivity headroom for high-fault panels
The Siemens 3VA1180-6EF32-0AA0 is a 3-pole SENTRON molded case circuit breaker rated 80 A at 40 °C, with a TM240 thermal-magnetic overcurrent release. Its 220 kA breaking capacity at 240 V gives substantial selectivity headroom upstream of a distribution board — you can coordinate downstream breakers without worrying about cascading through this main. At 415 V it still interrupts 154 kA, and at 690 V it holds 17 kA, so the part suits both 400 V and 690 V industrial supplies. Rated insulation voltage is 800 V, and the front face carries IP40 protection — fine for a clean indoor panel, but not for washdown zones. The 70 mm depth and 76.2 mm width match the standard 3VA1 footprint, so it drops into a panel already laid out for this series without re-drilling the mounting plate.
Thermal derating and power loss — plan the enclosure cooling
The 80 A rating holds flat from 40 °C to 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. If your panel ambient hits 55 °C, you lose 2 A — not a showstopper for most motor feeders, but worth checking against the continuous load. Maximum power loss is 19.2 W, which factors into the enclosure thermal budget; a standard steel enclosure with natural convection handles that, but a sealed stainless box may need a vent or fan. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The storage limit governs handling, not running — fine for unheated warehouses in cold climates.
Active lifecycle — no PCN watch needed for this BOM line
Lifecycle status is current — no phase-out or last-time-buy horizon on record. For an OEM building this into a panel design, that means no requalification trigger from the breaker side in the near term. The part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.