The Siemens SENTRON 3VA1080-4ED36-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated for 80 A continuous at 40 °C, with a line protection design — meaning it's built for feeder and main distribution duty, not motor-starting curves. The interrupting ratings climb to 121 kA at 240 V and 75.6 kA at 415 V, which gives you solid fault-clearing headroom for high-available-fault panels. The insulation voltage is rated 800 V, so it can sit on a 690 V system without derating the dielectric.
Mounts on a standard DIN rail — the 76.2 mm width (3 in) and 70 mm depth (2.76 in) fit a compact enclosure footprint. The supplied basic switch is 3VA10804ED360AA0; the auxiliary switch block carries 2 auxiliary switches plus 1 trip alarm switch (HQ), and the shunt trip (STL) is pre-installed. No undervoltage release on this variant, and no ground-fault monitoring. The trip indicator and voltage trigger are present, so you get local fault annunciation and remote shunt-trip capability out of the box.
Ambient operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The current rating holds steady at 80 A up to 50 °C, then derates linearly to 74 A at 70 °C — useful data for a hot panel or a summer peak load. No communication function on this variant; it's a standalone thermal-magnetic breaker with shunt trip.