What this MCCB carries and where it fits
The Siemens SENTRON 3VA1080-3ED32-0KA0 is a 3-pole molded case circuit breaker rated for 80 A continuous current, with a TM210 thermal-magnetic overcurrent release. At 240 V it interrupts 75.6 kA; at 415 V that drops to 52.5 kA, and at 440 V to 32 kA — so on a 400 V distribution board this breaker handles substantial fault current without cascading upstream. The 800 V rated insulation voltage (Ui) covers most industrial panel voltages. It ships with a shunt trip (STL) integrated; no auxiliary contacts, no undervoltage release, no ground-fault monitoring. The front face carries IP40 protection — fine for a dry indoor enclosure, not for washdown.
Thermal derating — the real current you get above 50 °C
This breaker holds its full 80 A rating up to 50 °C ambient. At 55 °C it derates to 76.8 A, at 60 °C to 75.2 A, at 65 °C to 73.6 A, and at 70 °C to 72 A. If the panel runs hot — say a packed enclosure near a furnace line — that 72 A floor at 70 °C is the number to size against, not the nameplate 80 A. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.
Panel fit and dimensions
The breaker measures 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and DIN-rail adapter plates. The shunt trip coil (3VA9688-0BL33) is factory-fitted; no field wiring of an external release needed. Latching endurance is rated at 15,000 operations.