80 A, 4-pole MCCB — line protection with TM240 release
The Siemens SENTRON 3VA1180-3GF42-0AA0 is a 4-pole molded case circuit breaker rated for 80 A continuous at 40 °C, carrying the same 80 A rating through 50 °C before a gentle derate curve kicks in — 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, 74 A at 70 °C. That thermal stability means you don't lose headroom in a warm panel unless ambient pushes past 50 °C. The TM240 thermal-magnetic release handles overloads and short-circuits without an electronic trip unit. Insulation voltage is rated 800 V. Short-circuit breaking capacity varies with line voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That's a healthy SCCR curve — at 480 V you're interpolating between the 440 V and 500 V figures, still well above typical available fault current for most industrial panels.
Panel fit and mounting
Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a standard SENTRON 3VA footprint. Front protection is IP40, so it's fine inside a closed panel; no washdown rating on the front face. No undervoltage release, no communication module, no ground-fault monitoring on this variant — it's a straight line-protection breaker with the N-conductor protection at 100%. Power loss is 19.2 W maximum at rated current — factor that into your panel thermal budget if you're stacking several breakers in a small enclosure.