The Siemens SENTRON 3VA1080-4ED36-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying an 80 A continuous current at 40 °C and a TM210 thermal-magnetic overcurrent release. Its breaking capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that determine whether this breaker clears a fault before upstream devices see it. No communication function, no ground-fault monitoring, and no undervoltage release are built in; the auxiliary switch package is two HQ-style switches.
Thermal derating and panel fit
The 80 A rating holds through 50 °C ambient; above that it derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. For a panel that runs warm — say, adjacent to drives or transformers — the 55 °C derating is the number to use in the BOM. The breaker measures 70 mm deep, 76.2 mm wide, and 130 mm tall, which fits standard 3-pole MCCB footprints on a DIN rail or panel-mount base. Power loss at full load is 19.2 W, a figure to include in the enclosure thermal budget.
Breaking capacity and selectivity
The 121 kA at 240 V and 75.6 kA at 415 V are the interrupting ratings that govern fault clearance. At 500 V and 690 V the rating drops to 11.9 kA — still sufficient for most industrial motor branch circuits, but the coordination study should confirm that downstream devices are rated for the let-through energy. The rated insulation voltage is 800 V, so the breaker is suitable for 480/277 V and 600 V systems with headroom.