Siemens SENTRON 3VA1080-4ED42-0CH0 — 80 A MCCB with Undervoltage Release
It carries a breaking capacity of 121 kA at 240 V, stepping down to 75.6 kA at 415 V and 52.5 kA at 440 V — figures that matter when you're sizing for fault current at the secondary side of a transformer or a low-impedance bus.
The 3VA1080-4ED42-0CH0 delivers 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Compare that to the 3VA1110-5EF32-0AM0 — a 100 A frame that shares the same SENTRON platform but steps up the thermal rating while the breaking curve at the higher voltages is similar. For a 400 V distribution board where the available fault current is around 50 kA, this breaker has headroom; for a 690 V motor control center with high fault levels, the 11.9 kA rating is the hard limit.
Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a compact 4-pole footprint that fits standard Siemens SENTRON mounting plates or DIN-rail adapters. The auxiliary switch block (2 aux + 1 alarm) adds about 9 mm to the depth; verify clearance if the panel is tight.