What this MCCB carries — and where it fits
The 3VM1220-5ED32-0AA0: Interrupting capacity is 187 kA at 240 V AC, 121 kA at 415 V, 76 kA at 440 V, and 30 kA at 500 V — figures that cover most industrial service-entrance and distribution applications where high fault current is expected. Rated insulation voltage (Ui) is 690 V, and maximum operational voltage with DC is 500 V. The front face carries IP40 protection — suitable for enclosed panel mounting where no washdown or dust ingress is expected.
Thermal derating and power loss — what the numbers mean for panel layout
The 200 A rating holds flat from 40 °C through 50 °C ambient. Above that it derates: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. If your panel ambient runs hot — say next to a drive or transformer — this derating curve tells you exactly where the breaker lands without guessing. Maximum power loss is 42 W. That is modest for a 200 A frame, but in a densely packed enclosure with multiple breakers side by side, the cumulative heat needs to be factored into the ventilation or forced-air calculation. Dimensions are 105 mm wide, 158 mm high, 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount layouts without surprises.