What this MCCB is and what the ratings mean for fit
The Siemens 3VA1080-4ED42-0BC0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection — a 4-pole, 80 A continuous-current device with a TM210 thermal-magnetic overcurrent release. The 80 A rating holds flat from 40 °C to 50 °C, then derates to 72 A at 70 °C, so in a warm panel you still have headroom to the breaker's nameplate. Interrupting capacity runs 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V; at 690 V it drops to 11.9 kA. That 121 kA at 240 V means this breaker can clear a fault at the service entrance of a high-capacity 240 V distribution panel without upstream coordination issues. It includes an undervoltage release (UVR) as standard — the auxiliary release design is designated 3VA9608-0BB11, and two HQ auxiliary switches are factory-fitted. No trip indicator, no communication function, no phase-failure detection, no ground-fault monitoring: this is a straight thermal-magnetic MCCB with UVR, built for standard line protection where you need positive shutdown on loss of control voltage. Mounts in a standard panel cutout; IP40 on the front means it's protected against tools and wires larger than 1 mm, but not sealed against water — keep it inside an enclosure rated for the environment. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C.
Integration and panel fit
Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a compact 4-pole MCCB footprint that fits standard panel layouts. The 2 HQ auxiliary switches and UVR are pre-installed, so no additional wiring for those functions. Latching endurance is rated at 15,000 operations, which covers typical switching cycles in a distribution panel over its service life.