The Siemens 3VA1163-5EE32-0AA0-ZD00 is a 3-pole IEC frame 160 molded case circuit breaker rated 63 A with a breaking capacity class M, delivering Icu=55 kA at 415 V. It carries line protection via a TM220 thermal-magnetic trip unit with ATFM (adjustable thermal, fixed magnetic) — overload protection Ir adjustable from 44 A to 63 A, short-circuit protection Ii fixed at 10 x In. The suffix ZD00 indicates a nut keeper kit included, configured for a DC Power OEM in China.
What the ratings mean for fit
55 kA Icu at 415 V is the ultimate short-circuit breaking capacity — the breaker can safely interrupt a fault up to that level once and still carry rated current afterward. For most industrial distribution panels fed from a transformer of 1000 kVA or less, that's enough headroom to avoid cascading upstream. The 63 A frame with adjustable thermal pickup (44–63 A) lets you match the cable or load without swapping the breaker body. Fixed magnetic Ii at 10 x In (630 A) means it holds through motor inrush on a 63 A feeder but trips fast on a bolted fault.