Siemens SENTRON 3VA1220-5GF42-0KA0 — 200 A MCCB with Shunt Trip
The Siemens SENTRON 3VA1220-5GF42-0KA0 is a 4-pole molded case circuit breaker (MCCB) rated 200 A continuous, designed for line protection in industrial distribution panels. It carries a TM240 thermal-magnetic overcurrent release and an integrated shunt trip (STL) auxiliary release for remote tripping. 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
The 200 A rating holds at ambient temperatures up to 50 °C. 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. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C. The storage limits govern handling and warehousing, not running conditions.
Dimensions and Panel Fit
The breaker measures 140 mm wide, 158 mm high, and 70 mm deep — a standard SENTRON 3VA frame size that fits common DIN-rail or panel-mount enclosures. The 70 mm depth leaves clearance for rear-connected busbars or cable lugs in a typical 200 mm deep cabinet.
Sourcing and Availability
As a current-production part, the 3VA1220-5GF42-0KA0 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.