MCCB for line protection — 80 A, 3-pole, high interrupting capacity
The Siemens SENTRON 3VA1080-3ED36-0HH0 is a 3-pole molded case circuit breaker rated 80 A at 40 °C, designed for line protection in distribution panels. Its interrupting capacity reaches 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — figures that cover most industrial service-entrance and feeder applications where high fault current is expected. At 500 V and 690 V the rating drops to 7.5 kA, so verify the available fault current at the point of installation if the system runs at those voltages. The breaker carries a shunt trip release (STL) and is factory-equipped with 2 auxiliary switches plus 1 trip alarm switch HQ — enough status feedback for remote monitoring without adding external relay logic. Rated insulation voltage is 800 V, and maximum power loss is 19.2 W, which matters for thermal management inside a sealed enclosure.
Panel fit and integration
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard SENTRON 3VA footprint that mounts on DIN rail or panel-mount adapter. The 3-pole width occupies roughly three 18 mm module spaces. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Thermal derating and trip features
The breaker holds full 80 A rating from 40 °C through 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. A trip indicator and voltage trigger are built in; no undervoltage release, ground-fault monitoring, or communication function is included on this variant.