The Siemens 3VA1080-4ED42-0AE0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection, carrying an 80 A continuous rating at 40 °C and a 4-pole configuration that handles three-phase plus neutral circuits in a single enclosure. Breaking capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that give selectivity headroom downstream of a transformer or generator main, so the MCCB clears a fault without taking the whole board out. The TM210 thermal-magnetic release is a fixed-trip curve suited to cable and busbar protection; no ground-fault module is fitted, so if GFCI is required at this point in the distribution, plan an external residual-current device downstream.
Integration & mounting
Footprint is 101.6 mm wide by 130 mm tall by 70 mm deep — a standard 4-pole MCCB envelope that fits most DIN-rail or panel-mount enclosures without re-drilling the backplate. Rated insulation voltage is 800 V, so it can sit in a 690 V distribution panel with full clearance margins. Power loss maxes at 19.2 W — negligible for cabinet thermal calculations unless you stack a dozen in a sealed box. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. The 80 A rating holds flat up to 50 °C (–), then derates gradually to 74 A at 70 °C — no surprise derating curve for panel builders who know the 3VA family.