The Siemens SENTRON 3VA1080-4ED42-0JC0 is a 4-pole molded case circuit breaker (MCCB) rated for 80 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release. It's built for line protection — meaning it sits upstream of a distribution bus or a large load group, not as a dedicated motor starter. The interrupting ratings climb to 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V, so it handles high-fault utility feeds without cascading upstream. At 690 V it still clears 11.9 kA, which matters for industrial 690 V networks common in mining or marine.
What the ratings mean for fit
The 80 A rating holds flat from 40 °C to 50 °C — no derating needed in a warm panel. At 55 °C it drops to 76.8 A, and at 70 °C it's 72 A. If your enclosure runs hot, size the load to the 70 °C figure, not the nameplate 80 A. The TM210 release is a fixed thermal-magnetic type; no interchangeable trip units, so the breaker is matched to the 80 A frame permanently. The 800 V rated insulation voltage (Ui) confirms it's suitable for 690 V systems with margin.
Panel integration notes
The 3VA1080-4ED42-0JC0 measures 130 mm high, 101.6 mm wide, and 70 mm deep — a standard MCCB footprint for a 4-pole 80 A frame. It mounts on a DIN rail or directly to a backplate via the screw terminals. The front face carries IP40 protection, so it's fine in a clean panel but not for washdown areas. It ships with 2 HQ auxiliary switches (form C) and a shunt trip (STL) for remote tripping; no undervoltage release, no ground-fault module, no N-conductor protection. If you need those, this isn't the variant.