The Siemens SENTRON 3VA1080-4ED36-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated 80 A at 40 °C, designed for line protection in distribution panels. It carries a TM210 thermal-magnetic overcurrent release and an integrated undervoltage release (UVR), so it drops the load if supply voltage falls below the dropout threshold — a standard requirement for motor feeder circuits where restart after a sag must be controlled.
Breaking capacity and selectivity
Rated breaking capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V. At 500 V and 690 V it holds 11.9 kA. That 121 kA figure at 240 V is high for a 80 A frame — it lets this breaker sit upstream of lower-rated downstream devices without coordination arithmetic getting tight, as long as the prospective fault current at the panelboard doesn't exceed that ceiling. The 800 V rated insulation voltage (Ui) confirms the internal clearances are sized for 690 V line-to-line systems.
Thermal derating and enclosure fit
Current rating is flat 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 sealed, uncooled enclosure at 55 °C ambient, you lose 2 A — negligible for a feeder sized at 80 A. Frame dimensions are 130 mm high, 76.2 mm wide, and 70 mm deep, which fits the standard SENTRON 3VA mounting footprint for three-pole breakers on DIN rail or panel-mount.