What the ratings mean for fit
The Siemens 3VA1180-5EE36-0AA0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection in distribution panels. Its 80 A continuous rating holds across 40 °C to 50 °C ambient, then derates to 78 A at 55 °C and 74 A at 70 °C — so if the panel runs hot, the real ampacity is lower than the label. The TM220 thermal-magnetic trip unit handles overload and short-circuit protection without electronic adjustments, which keeps commissioning simple but means no field-adjustable trip curves. Three-pole construction fits standard 3-phase feeders. Short-circuit withstand is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V or 690 V. That 187 kA figure at 240 V gives headroom for high-fault utility feeds or transformer secondaries; the 17 kA at 690 V still covers most industrial motor branch circuits. Insulation voltage rated 800 V, so the breaker is suitable for 690 V line-to-line systems without series-derating concerns.
Mounting and panel integration
Footprint is 76.2 mm wide by 130 mm tall by 70 mm deep — a standard 3-pole MCCB envelope that drops into most SENTRON or third-party distribution panels without re-drilling. IP40 on the front means it's protected against tools and wires >1 mm, but not against water ingress; mount in a dry enclosure or behind a gland plate. No undervoltage release, no ground-fault monitoring, no communication module — this is a plain line-protection breaker with no auxiliaries built in.