The Siemens SENTRON 3VA1080-4ED42-0HC0 is a 4-pole molded case circuit breaker rated for 80 A continuous current at 40 °C, with a TM210 thermal-magnetic overcurrent release and an integrated shunt trip (STL) for remote tripping. Its interrupting capacity hits 121 kA at 240 V and 75.6 kA at 415 V — numbers that matter when you're coordinating downstream protection in a distribution panel and need the main breaker to hold through a fault without cascading upstream.
At 55 °C the continuous current derates to 76.8 A; at 70 °C it drops to 72 A. Two auxiliary switches (HQ version) are built in for status feedback to the PLC or panel lamps. The shunt trip (STL) coil lets a safety relay or E-stop circuit drop the breaker remotely — wired correctly, it's the difference between a controlled stop and a man running to the handle.