Siemens 3VA1180-5EF36-0AG0 — SENTRON MCCB, 80 A, 3-Pole, High Interrupting Capacity
The Siemens 3VA1180-5EF36-0AG0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection, rated 80 A continuous at 40 °C and carrying a TM240 thermal-magnetic overcurrent release. 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.
What the ratings mean for fit
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. The TM240 release is a fixed thermal-magnetic type; no electronic adjustment or communication function is built in. The rated insulation voltage of 800 V gives headroom for 480 V or 600 V systems without de-rating the dielectric. 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.