Siemens SENTRON 3VA1220-5GF42-0KA0 — 200 A MCCB with Shunt Trip
Interrupting capacity is 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V — covering most industrial fault-current scenarios without needing a current-limiting upstream device.
Thermal Derating and Ambient Performance
Above that, the TM240 release derates linearly: 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. For a panel running hot near the top of the enclosure, this derating curve tells you the actual continuous current the breaker will carry without nuisance tripping. The storage limits govern handling and warehousing, not running conditions.
