SENTRON 3VA1220-4EF42-0JC0 — 200 A MCCB for Line Protection
The Siemens 3VA1220-4EF42-0JC0 is a SENTRON molded case circuit breaker (MCCB) rated for 200 A continuous current at 40 °C, with a 4-pole configuration and a shunt trip release (STL) for remote tripping. Designed for line protection, it delivers interrupting ratings of 121 kA at 240 V and 75.6 kA at 415 V — figures that determine whether this breaker clears a fault without upstream damage in your selective coordination study.
Interrupting Capacity and Thermal Derating
This MCCB carries 200 A flat from 40 °C through 50 °C, then derates to 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C. The interrupting capacity drops with system voltage: 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. For a 480 V panel, the 52.5 kA figure governs — verify it exceeds your available fault current before bolting it into the switchboard.
Dimensions and Panel Fit
Footprint is 140 mm wide by 158 mm tall, with a 70 mm depth behind the panel. The 4-pole body occupies roughly 5.5 inches of DIN-rail or mounting-plate width — check your existing bus-bar takeoff spacing before committing the BOM line.
Auxiliary and Shunt Trip Provisions
Factory-fitted with 2 auxiliary switches (HQ type) and a shunt trip release (STL) for remote tripping. No undervoltage release is installed. The insulation voltage is rated 800 V, and maximum power loss is 42 W — relevant for enclosure thermal calculations in a sealed panel.