The Siemens SENTRON 3VA1180-6EF32-0AB0 is a 3-pole molded case circuit breaker (MCCB) rated 80 A, designed for line protection in distribution panels and switchboards. It carries a TM240 thermal-magnetic overcurrent release, so the trip curve is fixed at the factory — no interchangeable trip units here, which simplifies spares stocking but means you order the exact amp rating you need.
Breaking capacity — what the numbers mean for your panel
The interrupting rating is 220 kA at 240 V, dropping to 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 V and 690 V. That 220 kA figure at 240 V is high enough for most transformer-fed secondary distribution — it handles a fault right at the transformer terminals without needing a current-limiting fuse upstream. At 480/500 V the 17 kA rating is still adequate for typical industrial panelboards, but if your available fault current exceeds that, you'll need to coordinate with a current-limiting upstream device or step up to a higher-rated frame.
Thermal derating — don't let the panel oven fool you
The breaker holds 80 A continuous from 40 °C up to 50 °C ambient. Above that it derates: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. If your panel runs hot — say a sealed enclosure near a furnace or in a non-climate-controlled room — the 74 A at 70 °C rating is the number to use for load planning, not the 80 A nameplate. The maximum power loss is 19.2 W, which matters for thermal rise calculations in a crowded cabinet.
Mounting and integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep.
Approvals and documentation
Rated insulation voltage is 800 V, and the operating temperature range is -25 °C to 70 °C. Storage range is -40 °C to 80 °C. The product is RoHS and REACH compliant; UL and IEC certifications are standard for the SENTRON series. Compliance documentation (declaration of conformity, CE mark) is available from the manufacturer.