What it is and what it does
The Siemens 3VA1080-2ED36-0KA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 80 A at 40 °C, with a slight thermal derating to 74 A at 70 °C — the full curve is documented from 40 °C through 70 °C, so you can size it for elevated ambient conditions inside a sealed enclosure without guessing. Breaking capacity is 52.5 kA at 240 V, stepping down to 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 500 V and 690 V. That 52.5 kA figure at 240 V is the headline — it handles high-fault utility feeds or transformer secondaries where the available fault current is substantial. The 7.5 kA at 690 V still covers most industrial motor branch circuits. This variant includes a shunt trip release (STL) for remote tripping — useful for emergency-stop circuits or supervisory control that needs to open the breaker without a manual action. The overcurrent release is a TM210 thermal-magnetic type, which gives fixed thermal and magnetic trip settings suitable for general-purpose line protection.
Integration and mounting
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a 3-pole footprint that fits standard panel-mount cutouts for SENTRON 3VA devices. Rated insulation voltage is 800 V, and maximum power loss is 19.2 W, so factor that into enclosure thermal calculations. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The supplied basic switch is order code 3VA10802ED360AA0 — that is the internal switching mechanism. No communication function, no undervoltage release, no ground-fault monitoring on this variant. Trip indicator is not fitted.