What this MCCB carries and where it fits
The Siemens SENTRON 3VA1080-4ED32-0CH0 is a 3-pole molded case circuit breaker rated for 80 A continuous current at 40 °C, with a TM210 thermal-magnetic release tuned for line protection. Its interrupting capacity hits 121 kA at 240 V and 75.6 kA at 415 V — numbers that tell you it can clear a high-fault bolted short without upstream coordination headaches. The 800 V rated insulation voltage (Ui) means it's comfortable on 480 V or 600 V class distribution panels. That 70 mm depth and 76.2 mm width fit a standard MCCB footprint on the DIN rail or panel-mount plate, so it swaps into existing SENTRON or 3VA cutouts without re-drilling.
Ratings that matter for the panel builder
The 80 A continuous rating holds flat from 40 °C to 50 °C — no derating needed in a warm enclosure up to that point. At 55 °C it drops to 76.8 A, and at 70 °C it's 72 A. That's a clean thermal curve; you can size the breaker for a 72 A continuous load and still have headroom if the ambient stays under 50 °C. The IP40 front protection means it's fine in a closed panel; keep it out of washdown zones. The auxiliary contact block comes factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ type). That's enough for remote status and a separate alarm signal on a fault trip — no extra wiring for a shunt trip. The undervoltage release (UVR) is built in; if your safety circuit drops the control voltage, the breaker opens without a separate undervoltage module.