80 A MCCB with 220 kA interrupting rating — what that means for your panel
The Siemens SENTRON 3VA1180-6EF36-0JC0 is a 3-pole molded case circuit breaker rated for a continuous current of 80 A. Its interrupting capacity hits 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — figures that place it in the high-fault-duty class for industrial distribution. At 690 V it still clears 17 kA, so it handles the full low-voltage range without a derating curve that collapses above 480 V. The TM240 thermal-magnetic release provides line protection with a fixed thermal pickup and magnetic trip calibrated to the 80 A frame. No phase-failure detection, no undervoltage release, and no communication module — this is a straightforward, non-electronic breaker for main feeder or large subfeed duty where you don't need metering or remote trip indication.
Thermal derating and ambient limits
The 80 A rating holds flat from 40 °C through 50 °C. At 55 °C it derates to 76.8 A, at 60 °C to 75.2 A, at 65 °C to 73.6 A, and at 70 °C to 72 A. The operating ambient range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. If your panel ambient runs above 50 °C, the continuous current you can actually pull is the derated value — not the nameplate 80 A.
Physical fit and auxiliary wiring
Dimensions are 130 mm high, 76.2 mm wide, and 70 mm deep. The width is a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation. IP40 on the front means it's protected against tools and small wires entering the enclosure face — fine for a clean indoor panel, not for washdown areas. The breaker ships with a shunt trip (STL) release and two auxiliary switches (HQ configuration). The shunt trip accessory order code is 3VA9688-0BL32. If your BOM calls for undervoltage release or a ground-fault module, this variant doesn't carry them — you'd need a different suffix.