The Siemens SENTRON 3VA1180-5EF32-0AD0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection. It carries 80 A continuously at 40 °C ambient, with a thermal-magnetic TM240 release that handles overloads and short-circuits without external control power. The interrupting capacity hits 187 kA at 240 V AC — enough to clear a high-fault utility feed without upstream fuses.
Breaking capacity and derating
At 415 V the breaker still interrupts 121 kA; at 440 V it drops to 75.6 kA, and at 500 V or 690 V it holds at 17 kA. That steep curve means the 187 kA headline is real only on 240 V line-to-line or 120/240 V split-phase services — above 480 V the rating is a fraction of the peak. Thermal derating is mild: 80 A from 40 °C through 50 °C, then 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. The 19.2 W maximum power loss at full load adds heat inside the enclosure; factor it into the panel thermal budget.
Physical fit and auxiliaries
The case is 130 mm tall, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that drops onto a DIN rail or mounts directly to a backplate. Three auxiliary switches (HQ type) are built in for status feedback to a PLC or alarm panel. No undervoltage release, no ground-fault monitoring, no communication module on this variant — it is a plain thermal-magnetic breaker with aux contacts only. Insulation voltage is rated 800 V, so it is comfortable on 480 V or 600 V class systems.