The Siemens 3VM1220-4EE36-0AA2 is a 3-pole IEC frame 250 molded case circuit breaker rated 200 A continuous, with a breaking capacity of 36 kA at 415 V AC (class S). That Icu rating means it can safely interrupt a fault current up to 36,000 A at 415 V without welding or rupturing — sized for distribution panels where the available fault current is known to be at that level or below. The TM220 thermal-magnetic trip unit provides overload protection adjustable from 140 A to 200 A (Ir) and a fixed short-circuit pickup at 10 x In (Ii = 2000 A). The ATFM designation indicates a fixed magnetic trip with thermal adjustment, so the installer sets Ir via the dial on the front face to match the downstream cable or load.
Integration Notes
Mounts on a DIN rail or panel-mount base within the 3VM1 frame footprint. The terminal connection accepts copper or aluminum conductors sized for 200 A; verify lug kit compatibility for the specific cable range on site.