What this breaker is and what it carries
The Siemens SENTRON 3VA1080-2ED42-0BA0 is a 4-pole molded case circuit breaker (MCCB) rated for 80 A continuous at 40 °C, built around the TM210 thermal-magnetic trip unit. That TM210 designation means the thermal element is fixed at 80 A and the magnetic pickup is adjustable — a standard line-protection curve for feeder and distribution panels. It ships with an undervoltage release (UVR) integrated, so if control voltage drops, the breaker trips; that's a common spec for safety disconnects on machine infeed. Interrupting capacity is voltage-dependent: 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's enough for most industrial distribution panels fed from a 500 kVA transformer — the 415 V figure covers the common European 400 V grid with headroom.
Thermal derating and panel fit
The 80 A rating holds from 40 °C through 50 °C ambient. Above that it 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 runs hot — say a non-ventilated enclosure near a furnace line — that 74 A at 70 °C is the number to size against, not the 80 A nameplate. Maximum power loss is 21.7 W, which matters for enclosure thermal calculations. Dimensions are 130 mm tall, 101.6 mm wide, 70 mm deep — a standard SENTRON 3VA frame footprint. It mounts on a DIN rail or panel-mount baseplate. The 4-pole width (101.6 mm) means it occupies the same slot as other 4-pole 3VA breakers; swapping from a 3VA1010 frame is a direct mechanical fit.