What this MCCB delivers
The Siemens 3VA1080-2ED42-0HA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries 80 A continuously at 40 °C through its 4-pole frame, with a TM210 thermal-magnetic overcurrent release that handles both overload and short-circuit conditions. The shunt trip (STL) auxiliary release lets you remotely trip the breaker via a control signal — useful for emergency-off or interlock circuits. Breaking capacity varies with system voltage: 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That means it can safely interrupt fault currents up to those levels depending on your line voltage — critical for coordinating with upstream protective devices. Rated insulation voltage is 800 V, giving headroom for 690 V systems. The breaker dissipates 19.2 W maximum under load — factor that into enclosure thermal calculations if you're packing multiple units on a DIN rail.
Thermal derating and panel fit
The 80 A rating holds from 40 °C through 50 °C, then steps down: 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 runs hot, use the 70 °C figure for sizing — don't assume the 80 A nameplate applies in a sealed enclosure. Physical footprint: 130 mm tall, 101.6 mm wide, 70 mm deep. The 4-pole width is wider than a 3-pole equivalent — verify DIN-rail or mounting-plate space before committing the panel layout. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.