The Siemens 3VA1080-3ED42-0CH0 is a 4-pole SENTRON molded case circuit breaker rated for 80 A continuous at 40 °C, with a TM210 thermal-magnetic release and an undervoltage release (UVR) built in. The interrupting ratings climb to 75.6 kA at 240 V and 52.5 kA at 415 V — numbers that tell you it's sized for high-fault industrial panels, not light commercial. The 4-pole construction means it switches the neutral, which matters for TN-S or IT systems where you need full isolation on all conductors.
The 80 A rating holds flat from 40 °C to 50 °C, then starts to taper: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. Plan the load at 72 A if the enclosure hits 70 °C; the breaker won't nuisance-trip, but it also won't carry a full 80 A.
This breaker delivers 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V.
Auxiliary contacts and trip alarm — what's wired in
The auxiliary contacts follow the main contact position; the trip alarm signals only on a fault trip (overcurrent or undervoltage), not on manual open. That's the contact you'd wire to a PLC input for a shunt-trip or alarm annunciator. No separate UVR module to mount and wire.