The Siemens SENTRON 3VA1180-6EF32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 80 A continuously at 40 °C and derating to 74 A at 70 °C. Its interrupting capacity hits 220 kA at 240 VAC and 154 kA at 415 VAC — numbers that tell you it's built for high-fault panels where a standard MCB would weld closed. The 800 V rated insulation voltage (Ui) means it's comfortable on 480 V or 600 V distribution without creeping clearance issues.
Breaking capacity and selectivity
At 240 VAC this MCCB clears 220 kA; at 415 VAC it's still 154 kA, and at 440 VAC it holds 121 kA. Those are the numbers a site electrical engineer checks first for SCCR compliance on a transformer secondary or a generator main. The curve drops to 17 kA at 500 V and 690 V — still enough for most 600 V class industrial services, but if you're coordinating upstream of a 690 V drive, verify the let-through against your transformer impedance.
Thermal derating and power loss
Rated 80 A at 40 °C ambient, it holds that figure through 50 °C, then drops to 78 A at 55 °C and 74 A at 70 °C. That's a shallow derating curve — useful in a crowded panel where ambient climbs. Maximum power loss is 21.7 W, which matters for enclosure heat rise calculations if you're stacking several breakers in a sealed box.
Integrated trip and auxiliary switchgear
This breaker ships with a trip indicator (mechanical flag, no voltage trigger) and an undervoltage release (UVR) built in — the UVR drops the breaker if control voltage falls, standard for emergency-stop or undervoltage protection schemes. The auxiliary switch configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ), so you get separate NO/NC for status feedback and a dedicated alarm contact that changes state only on a fault trip. That saves an add-on module in most panels.
Physical fit and mounting
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard SENTRON 3VA footprint. It mounts on a DIN rail or can be screw-fixed to a backplate. The supplied basic switch is order code 3VA11806EF320AA0, meaning the internal mechanism is a known subassembly; if you're replacing an existing 3VA breaker in a panel, the mounting hole pattern and bus-bar spacing are consistent across the 3VA family.