What this MCCB carries and where it fits
The Siemens 3VA1180-4EF32-0KH0 is a 3-pole SENTRON molded case circuit breaker rated 80 A at 40 °C, sized for line protection in distribution panels and industrial switchboards. Its breaking capacity reaches 121 kA at 240 VAC, 75.6 kA at 415 VAC, and 52.5 kA at 440 VAC — figures that cover most low-voltage fault scenarios in commercial and light industrial installations. At 500 V and 690 V the interrupting rating holds at 11.9 kA, which is the ceiling for higher-voltage motor branch circuits where the available fault current is typically lower.
Thermal derating and continuous current
The breaker holds 80 A continuously from 40 °C through 50 °C ambient. Above that it derates: 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. The maximum power loss is 19.2 W, which matters for enclosure thermal calculations when grouping several breakers in a sealed panel.
Physical footprint and panel integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard 3-pole MCCB footprint that fits existing SENTRON mounting plates and DIN-rail adapters without re-drilling. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Internal configuration and auxiliary options
Factory-fitted with a shunt trip release (STL) and an auxiliary switch block carrying 2 auxiliary switches plus 1 trip alarm switch (HQ). The supplied basic switch is order code 3VA11804EF320AA0. No undervoltage release, no ground-fault monitoring, no communication function are included on this variant. Rated insulation voltage is 800 V, which covers 690 VAC line-to-line systems with margin.