The Siemens SENTRON 3VA1180-5EF36-0BC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 80 A continuously through 50 °C ambient before the thermal curve starts to bite — 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. That derating matters if this lands in a crowded panel with other heat sources; the full-load ampacity drops about 7.5 % from 50 °C to 70 °C.
Breaking capacity is the headline number here: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. That steep drop above 440 V tells you this breaker is optimized for 240–415 V distribution — common in North American and European industrial panels. At 690 V it still clears 17 kA, but if your fault current at that voltage is higher, you need a different frame.
Dimensions are 130 mm tall, 76.2 mm wide, 70 mm deep — a 3-inch-wide footprint that fits standard panel cutouts for 3-pole MCCBs in the 80 A class. Rated insulation voltage is 800 V, so it's fine for 480/277 V and 600 V systems with headroom. Max power loss is 21.7 W; factor that into your enclosure thermal calc if the panel is sealed or tightly packed.