The Siemens SENTRON 3VA1180-3EF32-0KA0 is a 3-pole molded case circuit breaker (MCCB) rated for 80 A at 40 °C, designed for line protection in distribution panels. It carries a shunt trip (STL) auxiliary release for remote tripping, and its breaking capacity reaches 75.6 kA at 240 V — enough to handle high-fault utility feeds without cascading upstream.
Ratings and what they mean for fit
The 80 A rating holds steady from 40 °C through 50 °C, then derates to 78 A at 55 °C and 74 A at 70 °C. That flat thermal curve means you don't lose headroom in a warm panel unless ambient exceeds 50 °C. The 800 V rated insulation voltage (Ui) covers 480 V and 600 V class systems with margin. Breaking capacity drops from 75.6 kA at 240 V to 52.5 kA at 415 V, then to 11.9 kA at 690 V. For a 480 V delta service, interpolate between the 415 V and 440 V figures — roughly 42 kA available. That's sufficient for most industrial secondary distribution, but verify against your transformer's fault current study. The shunt trip (STL) release allows a remote signal (e.g., from an E-stop or fire alarm relay) to open the breaker. It requires a separate control voltage — not a undervoltage release, so it won't trip on power loss unless commanded.
Panel integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard 3-pole MCCB footprint that fits most Siemens SENTRON panelboards and third-party enclosures with 3-inch-wide bus spacing. The shunt trip adds no extra width; it's internal to the breaker body.