Siemens SENTRON 3VA1080-3ED36-0CA0 — 80 A MCCB with Undervoltage Release
The Siemens SENTRON 3VA1080-3ED36-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for 80 A at 40 °C, designed for line protection in distribution panels and industrial switchgear. It carries a TM210 thermal-magnetic overcurrent release and an integrated undervoltage release (UVR), so it drops the load on loss of control voltage — a common requirement for safety disconnects on conveyor and machine-tool circuits. Breaking capacity reaches 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V, with a 7.5 kA floor at 500 V and 690 V. That gives solid selectivity headroom for 400 V-class distribution — the 52.5 kA at 415 V covers most European panel fault levels without cascading upstream. Rated current holds flat at 80 A from 40 °C through 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. In a warm enclosure or near a transformer, the 55 °C figure is the one to size against.
Panel Fit and Mounting
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a 3-pole footprint that fits standard Siemens SENTRON mounting plates and busbar systems. Depth of 70 mm (2.76 in) leaves room for rear-connected busbars in a 200 mm-deep enclosure. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 21.7 W — factor that into enclosure thermal calculations if the panel is densely populated.