What this 3VA1 breaker does on the line
The Siemens 3VA1132-5EE42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker with a breaking capacity class M rating of Icu=55kA at 415V. That 55kA figure means it can safely interrupt a fault current up to that level without welding its contacts or cascading a failure upstream — the kind of fault current you'd see on a high-capacity industrial distribution board, not a light commercial panel. Its TM220 thermal-magnetic trip unit gives adjustable overload protection (Ir=22A to 32A) and a fixed short-circuit pickup of Ii=10 x In. The 32A rated current (In=32A) and the 22-32A overload range let you dial it in for a specific motor or feeder load without swapping the breaker body. The N conductor is unprotected on this variant, so it's configured for a 3-phase + PEN system where the neutral doesn't need its own overcurrent element. This order code also includes a nut keeper kit and is designated for DC Power OEM in China — a factory-fit option that keeps the mounting hardware from wandering off during panel build or transit. The ATFM suffix indicates the accessory suite (auxiliary switch, alarm switch, shunt trip, undervoltage release) that ships with the breaker.
Panel integration notes
Mounts on a standard DIN rail or can be screw-fixed to a backplate using the included nut keeper kit. The 3VA1 frame is a compact IEC design — 4-pole version fits in roughly the same panel footprint as a 3-pole unit with a side-mounted neutral module, but verify the depth clearance for the TM220 trip unit and accessory wiring. Spring-cage terminals on the line and load sides accept copper conductors up to the frame's rated cross-section.