What this 3VA1 carries — and what it means on the line
The Siemens 3VA1180-5EF32-0DA0 is a SENTRON molded case circuit breaker (MCCB) rated for 80 A at 40 °C ambient, with a TM240 thermal-magnetic release and an integrated undervoltage release (UVR). Three-pole, line-protection design — no communication function, no ground-fault monitoring, no voltage trip. This is a straightforward main or feeder breaker for a panel that needs the UVR baked in at the factory, not added later. Breaking capacity is the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, 17 kA at 500 V and 690 V. Those numbers mean this breaker can sit upstream of a high-fault panel without needing a current-limiting fuse ahead of it — the interrupting rating alone handles the worst-case bolted fault on a 240 V or 415 V distribution bus. At 690 V the 17 kA rating still covers most industrial motor-control center lineups. Thermal derating is tight: holds 80 A all the way to 50 °C, then drops only 2 A per 5 °C step to 74 A at 70 °C. That gives you headroom in a warm enclosure without oversizing the frame. Insulation voltage rated 800 V, so the 690 V application is within its voltage class margin.
Panel fit and wiring
Footprint: 70 mm deep, 76.2 mm wide, 130 mm tall. That 3-inch width matches the standard SENTRON 3VA1 three-pole envelope — fits the same DIN-rail or screw-mount backplate as the rest of the 3VA1 family. No trip indicator on the face; the UVR coil is factory-installed, so verify the control voltage matches your panel's 24 VDC or 110-240 VAC supply before wiring the release terminals. Power loss maxes at 21.7 W — negligible for thermal budgeting in a standard sheet-metal enclosure, but worth noting if the panel is sealed and densely packed. Storage range -40 to 80 °C; operating range -25 to 70 °C. The -25 °C floor means it's fine for unheated electrical rooms in northern climates.