What the ratings mean for your panel
The Siemens 3VA1080-3ED36-0BH0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for line protection at 80 A continuous current. The TM210 thermal-magnetic release handles overloads and short-circuits without external power — no voltage trigger required. The interrupting ratings tell you where it can safely clear a fault: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. That 75.6 kA at 240 V means it handles high available fault current on the secondary side of a distribution transformer without upstream fuses needing to clear first. The 80 A rating holds flat from 40 °C to 50 °C; above that it derates gradually to 72 A at 70 °C, so a panel running at 55 °C ambient still carries 76.8 A — useful for a crowded enclosure with minimal ventilation. The front face carries IP40 protection — solid objects over 1 mm are blocked, but it is not sealed against moisture. Mount it inside a panel with a door; do not expose it to washdown or outdoor weather. The 70 mm depth, 76.2 mm width, and 130 mm height fit the standard SENTRON 3VA footprint, so it drops into an existing DIN-rail or screw-mounted assembly without re-drilling the backplate.
Built-in auxiliary and undervoltage release
This MCCB ships with 2 auxiliary switches plus 1 trip alarm switch (HQ type) integrated — no separate add-on block to order. The undervoltage release (UVR) is also factory-fitted, designed per the 3VA9608-0BB11 auxiliary trip assembly. If the control voltage drops below the release threshold, the breaker trips immediately; that is standard for safety circuits where a loss of control power must open the main contacts. The UVR is wired separately from the load circuit, so a 24 VDC safety PLC output can drive it directly. No communication function or phase failure detection is built in — this is a pure protection device, not a metering breaker.