MCCB with shunt trip for line protection
The Siemens 3VA1180-3EF32-0HA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 80 A at 40 °C with a TM240 thermal-magnetic release, and its 3-pole construction handles three-phase circuits up to 800 V insulation voltage. The integrated shunt trip (STL) auxiliary release allows remote tripping via a separate control signal — useful for emergency-stop or interlock circuits where the breaker must open on command independent of overcurrent conditions.
Breaking capacity across voltage levels
Breaking capacity defines where this MCCB can safely interrupt a fault. At 240 V it clears 75.6 kA; at 415 V, 52.5 kA; at 440 V, 32 kA; and at both 500 V and 690 V, 11.9 kA. These are the maximum prospective short-circuit currents the breaker can interrupt at each voltage — critical for coordination studies and ensuring the SCCR of the downstream panel is not exceeded. The 800 V rated insulation voltage supports use in 690 V line-to-line systems common in industrial drives and heavy machinery.
Thermal derating and power loss
The 80 A rating holds from 40 °C through 50 °C, then derates gradually: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. Maximum power dissipation is 19.2 W — relevant for enclosure thermal calculations when multiple breakers are ganged in a sealed panel. Operating temperature range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C.
Panel fit and dimensions
At 70 mm deep, 76.2 mm wide, and 130 mm tall, this MCCB fits standard Siemens SENTRON mounting footprints and accepts busbar or cable connections typical of 3-pole distribution blocks. The 76.2 mm width (3 inches) matches common DIN-rail or panel-mount cutout patterns for 160 A frame breakers. No trip indicator is fitted; the voltage trigger (shunt trip) is present as specified by the order code suffix.