The Siemens SENTRON 3VA1180-4EF32-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection. It carries 80 A continuously at 40 °C ambient, with a maximum breaking capacity of 121 kA at 240 V — enough to handle high-fault utility feeds or large transformer secondaries without cascading upstream. The 121 kA interrupting rating at 240 V means this breaker can safely clear a bolted fault at that level, preserving selectivity downstream. At 415 V it still breaks 75.6 kA, and at 690 V it holds 11.9 kA — the SCCR curve drops with voltage, so verify the available fault current at your system voltage. Rated insulation voltage is 800 V, and the unit includes an undervoltage release (UVR) plus two factory-fitted auxiliary switches (HQ design) for status feedback to a PLC or annunciator panel.
Thermal derating and panel fit
The breaker holds its full 80 A rating up to 50 °C ambient. Above that it derates linearly to 74 A at 70 °C — a useful margin for a sealed, non-ventilated enclosure. Maximum power loss is 21.7 W, so account for that heat when sizing the cabinet's thermal budget. Dimensions are 70 mm deep, 76.2 mm wide, and 130 mm tall — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and distribution blocks without re-drilling the mounting plate.