80 A, 4-pole, 52.5 kA — the line-protection MCCB with UVR
The Siemens SENTRON 3VA1080-2ED42-0DC0 is a 4-pole molded case circuit breaker rated for 80 A continuous current (Iu) at 40 °C, with a TM210 thermal-magnetic overcurrent release. It carries a 52.5 kA breaking capacity at 240 V, stepping down to 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 690 V — so it handles high fault currents on the secondary side of a distribution transformer without cascading upstream. This is the line-protection version (not motor-protection), meaning the TM210 release curve is sized for cable and busbar protection in main or sub-distribution panels.
Above that, derating is gradual: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C.
Integrated undervoltage release and auxiliary contacts
It also carries two HQ auxiliary switches for remote status indication.
The 101.6 mm width is a standard 4-pole MCCB footprint — it occupies four 25.4 mm module spaces on a DIN rail or panel-mount plate. Front protection is IP40, so it's fine for general-purpose indoor panels but not washdown zones.