What this MCCB delivers for the panel
The Siemens SENTRON 3VA1180-5EF32-0AH0 is a 3-pole molded case circuit breaker rated 80 A at 40 °C, carrying a TM240 thermal-magnetic release for line protection. Its interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 75.6 kA at 440 V — figures that give the panel designer headroom for high-fault utility connections or transformer secondaries without cascading upstream breakers. The 19.2 W maximum power loss is what the enclosure ventilation needs to shed; factor it into the thermal budget if the panel is densely packed.
Thermal derating and continuous current
Rated 80 A from 40 °C through 50 °C, then steps down: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, 74 A at 70 °C. If the panel ambient runs at 60 °C, plan for 77 A continuous — not the full 80 A nameplate. The TM240 release is fixed-thermal, not adjustable; the trip curve is set at the factory.
Breaking capacity by voltage — selectivity planning
The 3VA1180-5EF32-0AH0 delivers 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V. At 480 V systems (common in North America) the 415 V figure is the closest reference — 121 kA is well above typical 65 kA or 100 kA SCCR targets. At 690 V the 17 kA rating is the binding limit; verify it against the available fault current if the breaker feeds a 690 V drive input.
Footprint and auxiliary switch configuration
The breaker measures 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits SENTRON mounting bases and common DIN-rail adapters. The factory-fitted auxiliary switch block carries 2 auxiliary switches plus 1 trip alarm switch (HQ type), which covers status feedback and remote trip indication without an add-on module. No undervoltage release or ground-fault monitoring is included on this variant.