The Siemens SENTRON 3VA1180-6EE36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated 80 A at 40 °C, with a TM220 thermal-magnetic overcurrent release. It's built for line protection — the main feed in a distribution panel or a heavy motor branch — where you need high interrupting capacity without a separate trip unit. Interrupting rating is the headline here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V. That kind of fault-clearing muscle means it can sit upstream of smaller breakers in a high-available-fault-current plant — think transformer secondaries or large motor control centers — without needing a current-limiting fuse ahead of it.
Thermal derating and panel fit
The 80 A rating holds all the way to 50 °C; above that it derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. If your panel runs hot — say near a furnace line or in a sealed enclosure in a southern plant — you'll want to size the load to the 70 °C figure, not the 40 °C one. The depth is 70 mm, width 76.2 mm, height 130 mm, with IP40 protection on the front — standard for a panel-mounted MCCB, not for wet locations. Power loss runs 19.2 W maximum — that's the heat it dumps into the enclosure. In a packed panel with multiple breakers, that adds up; account for it in your thermal budget.