MCCB for line protection — 80 A, 220 kA breaking capacity
The Siemens SENTRON 3VA1180-6EF32-0KC0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection, rated 80 A at 40 °C and carrying a 220 kA breaking capacity at 240 V. That 220 kA figure at 240 V tells you this breaker handles high-fault-current scenarios — typical for large transformer secondaries or main feeders where fault levels can exceed 100 kA. The 80 A rating holds steady through 50 °C, then derates to 74 A at 70 °C, so it can be applied in warm enclosures without oversizing.
Breaking performance across voltages
Breaking capacity drops as voltage rises: 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 500 V and 690 V. That 17 kA floor at 690 V still covers most industrial distribution panels. The rated insulation voltage is 800 V, confirming suitability for 690 V systems with margin.
Integrated auxiliary functions
This variant ships with a shunt trip (STL) auxiliary release and two HQ auxiliary switches. The shunt trip allows remote tripping from a PLC or emergency-stop circuit — useful for safety interlocks or load shedding. The HQ auxiliary switches provide status feedback (open/closed/tripped) to a control system. No undervoltage release or ground-fault monitoring is fitted on this order code.
Mounting and integration
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth. The 3-pole MCCB mounts on a DIN rail or directly to a backplate via the standard SENTRON footprint. The 70 mm depth fits standard distribution enclosures without crowding the door or busbar connections.