What this 3VA1180-4EF36-0BC0 is and what it does
The Siemens SENTRON 3VA1180-4EF36-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection — the main feeder or branch breaker in a distribution panel. It carries 80 A continuously at 40 °C ambient (derated to 74 A at 70 °C), and its interrupting capacity hits 121 kA at 240 VAC, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that tell you it's built for high-fault industrial service, not light commercial. The insulation voltage is rated 800 V, so it handles 480/600 V systems without derating the dielectric.
Built-in auxiliaries and releases — no add-on modules needed
This breaker includes an undervoltage release and two auxiliary switches (HQ design) factory-installed. The UVR drops the trip coil when control voltage falls below threshold; the aux switches provide remote status signals.
Lifecycle and sourcing reality
The lifecycle stage is "current" — this is an active, in-production catalog item. No last-time-buy or phase-out notice on record.
Dimensions and panel fit
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. The 70 mm depth fits most enclosures; the 76.2 mm width is the standard 3-pole pitch for this frame size.