MCCB for line protection with integrated undervoltage release
The Siemens SENTRON 3VA1180-4EF36-0CC0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 80 A at 40 °C, with thermal derating to 74 A at 70 °C — the full thermal curve is on the spec table so you can size for your enclosure ambient without guesswork. Breaking capacity is 75.6 kA at 415 V, 121 kA at 240 V, and 52.5 kA at 440 V — per the datasheet, these are the maximum prospective fault currents the breaker can safely interrupt at those line voltages. At 500 V and 690 V the rating holds at 11.9 kA, which covers most industrial motor-circuit fault levels. This variant ships with an integrated undervoltage release (UVR) and two auxiliary switches HQ, so it drops the load on loss of control voltage and provides remote status indication without adding external modules. No communication function on board — this is a standalone line-protection device, not a power-monitoring breaker.
Panel fit and mounting dimensions
The 3VA1180-4EF36-0CC0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits most Siemens SENTRON distribution panels and third-party enclosures with the appropriate mounting kit. The 70 mm depth (2.76 in) keeps the breaker within typical 200 mm deep enclosures, leaving room for cable bending radius behind the line and load terminals.