What this 200 A MCCB does in the panel
The Siemens 3VA1220-6EF42-0BH0 is a SENTRON molded case circuit breaker (MCCB) rated 200 A at 40 °C, 4-pole, designed for line protection in distribution panels. Its 220 kA breaking capacity at 240 V AC means it can safely interrupt fault currents up to that level without cascading upstream — critical for high-fault installations like transformer secondaries or industrial mains.
Ratings that govern the fit
Rated current holds at 200 A from 40 °C through 50 °C; it begins to derate above that — 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, 176 A at 70 °C. Breaking capacity drops as system voltage rises: 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, 17 kA at 690 V. Insulation voltage is rated 800 V. The unit includes an undervoltage release (UVR) and carries 2 auxiliary switches plus 1 trip alarm switch (HQ type).
Panel integration and dimensions
Dimensions are 158 mm high, 140 mm wide, 70 mm deep — a 4-pole MCCB that fits standard Siemens SENTRON mounting bases and busbar systems. Maximum power loss is 44.5 W, which factors into enclosure thermal calculations. Operating temperature range is -25 °C to +70 °C; storage range is -40 °C to +80 °C.
Sourcing and compliance
This part is sourced to order through independent distribution channels. Availability and current pricing are confirmed at quote time against an RFQ. The SENTRON series carries the usual IEC/UL certifications for molded case circuit breakers; compliance documentation (RoHS, REACH) is available with the shipment.