What this MCCB is and what it does
The Siemens 3VA1180-4EF32-0KA0 is a SENTRON molded case circuit breaker (MCCB) in the line protection version, rated for a continuous current of 80 A across ambient temperatures from 40 °C through 50 °C, with a slight derating curve starting at 55 °C (76.8 A) down to 72 A at 70 °C. It carries a TM240 thermal-magnetic overcurrent release — the thermal element handles overloads, the magnetic element handles short circuits — and includes a shunt trip (STL) for remote tripping via a voltage trigger. This is a 3-pole unit with no auxiliary contacts, no undervoltage release, no communication function, and no ground fault monitoring — it is a straight line-protection breaker for distribution panels where you need a shunt trip and nothing else on the accessory rail.
Breaking capacity — what those kA numbers mean for your panel
The interrupting ratings are the headline: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. At 415 V, that 75.6 kA means this breaker can safely clear a fault up to that level without welding its contacts or venting arc gas into the enclosure — critical for high-fault panels near large transformers or motor control centers. The 690 V rating at 11.9 kA is lower but still useful for 690 V distribution in mining or marine applications; just confirm your available fault current is below that threshold.
Physical fit and panel integration
Dimensions are 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and distribution blocks without re-drilling the mounting plate. Front protection is IP40, so it is fine for indoor panel use but not rated for washdown or dust ingress beyond the front face. The shunt trip accessory is specified as order code 3VA9688-0BL33 — if you are retrofitting a shunt trip into an existing 3VA family panel, that is the mating part number.