What this MCCB is and what it carries
The Siemens 3VA1180-6EF36-0AF0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — the primary role is protecting cable and bus from overloads and short circuits, not motor starting duty. It carries a TM240 thermal-magnetic overcurrent release, meaning the thermal element handles overloads and the magnetic element handles short-circuit faults up to its rated breaking capacity. Rated 80 A continuously at 40 °C ambient, it derates slightly as the panel warms: 78 A at 55 °C, 74 A at 70 °C — useful to know if this breaker sits in a crowded enclosure with other heat sources. Breaking capacity is the headline number that decides whether this breaker clears a fault without exploding or welding closed. At 240 V it interrupts 220 kA — that is a very high rating, typical for a main breaker in a large industrial distribution board. At 415 V it still holds 154 kA, and at 690 V it drops to 17 kA (the lower voltage arc-quenching limit of the design). The 800 V rated insulation voltage confirms it is built for 690 V line-to-line systems. Three-pole construction covers three-phase circuits. The auxiliary switch configuration is 1 auxiliary + 1 trip alarm switch HQ — that gives you one NO/NC contact for status feedback and a separate contact that only changes state when the breaker trips on fault, useful for remote alarm annunciation. The trip indicator gives a local visual flag.
Where it goes in the panel
This MCCB mounts on a DIN rail or can be screw-fixed to a backplate. Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most distribution boards. Power loss is 19.2 W maximum, so factor that into enclosure thermal calculations if grouping several breakers. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.