SENTRON 3VM1220-4GE42-0AA0 — 200 A Molded Case Circuit Breaker, Active Production
Breaking capacity reaches 121 kA at 240 V AC, 76 kA at 415 V, 53 kA at 440 V, and 17 kA at 500 V — figures that govern its placement in a distribution panel's fault-withstand hierarchy. The TM220 release has a fixed instantaneous pickup at 2000 A (10× In), so it coordinates with downstream branch breakers on a motor-start or transformer-inrush profile without nuisance tripping.
Thermal Derating and Panel Fit
Rated current holds flat at 200 A from 40 °C through 50 °C, then derates linearly to 176 A at 70 °C — a curve that matters when the breaker shares an enclosure with other heat sources. Dimensions are 158 mm high, 140 mm wide, 70 mm deep — a 4-pole footprint that fits standard SENTRON mounting bases and busbar systems without adapter plates. Front-face protection is IP40, adequate for enclosed panel mounting where the breaker is not exposed to washdown or dust ingress.