Siemens 3VA1180-5EF36-0AG0 — SENTRON MCCB, 80 A, 3-Pole, High Interrupting Capacity
It is a 3-pole unit with an interrupting capacity of 187 kA at 240 VAC, 121 kA at 415 VAC, 75.6 kA at 440 VAC, and 17 kA at both 500 VAC and 690 VAC — figures that cover most industrial distribution fault levels without needing a current-limiting upstream device.
The 80 A continuous rating holds flat from 40 °C to 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 — so in a warm panel (say 55 °C internal ambient) you lose only 2 A, not a full frame size. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — a compact 3-pole footprint that fits standard panel-mount cutouts for this frame size. The auxiliary switch configuration is 1 auxiliary switch + 1 trip alarm switch (HP type), which provides both a status signal and a separate fault indication without needing an external relay.