What this MCCB is and what it does
The Siemens 3VA1180-4EF36-0AB0 is a 3-pole molded case circuit breaker (MCCB) from the SENTRON family, designed for line protection with a TM240 thermal-magnetic release. It carries 80 A continuously at 40 °C — the rating holds flat through 50 °C, then derates to 74 A at 70 °C, which matters if you are stuffing it into a warm cabinet with other heat sources. The interrupting capacity tells you where it can go: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA figure at 240 V is what you need for high-fault utility feeds or transformer secondaries in North American panels; the 75.6 kA at 415 V covers European 400 V distribution with a solid margin. Rated insulation voltage is 800 V, so the breaker itself is insulated for 690 V line-to-line applications without requiring series derating of the insulation path.
Physical fit and integration
Dimensions: 130 mm tall, 76.2 mm wide, 70 mm deep. The 76.2 mm width (3 inches) is the standard 3-pole MCCB footprint for SENTRON 3VA. Comes factory-fitted with 2 auxiliary switches HP (high-performance) — that is the switching capacity for signaling the breaker state back to a PLC or status lamp. No undervoltage release, no shunt trip, no ground-fault module on this variant; those are add-on accessories if the application needs them. Power loss at rated current is 19.2 W maximum — relevant for thermal calculations inside a sealed enclosure. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.