Siemens 3VA1220-4GF42-0JA0 — SENTRON Molded Case Circuit Breaker, 200 A, 4-Pole
The Siemens 3VA1220-4GF42-0JA0 is a SENTRON molded case circuit breaker (MCCB) rated at 200 A continuous, with a 4-pole configuration and a TM240 thermal-magnetic overcurrent release. It carries a shunt trip (STL) auxiliary release for remote tripping, and is designed for line protection in distribution panels. The breaking capacity is 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V — per the datasheet, these are the maximum fault currents the breaker can safely interrupt at each voltage level, which governs its suitability for high-fault installations.
Thermal Derating and Operating Range
The 200 A rating holds at ambient temperatures up to 50 °C. Above that, the continuous current must be derated: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. The operating ambient range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. The rated insulation voltage is 800 V, and maximum power loss is 42 W.
Dimensions and Panel Integration
The breaker measures 70 mm deep, 140 mm wide, and 158 mm high. These dimensions fit standard SENTRON 3VA panel cutouts and busbar systems. The 4-pole form factor occupies the same footprint as other 3VA frames in the 200 A class, so a panel laid out for a 3VA1110 or 3VA2116 will accept this unit without re-drilling the mounting plate — verify the busbar tap positions for the shunt trip wiring.