Panel Integration and Ratings
The Siemens 3VA1112-5ED42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker (MCCB) rated for line protection. It carries a breaking capacity class M with Icu=55kA at 415 VAC — meaning it can safely interrupt fault currents up to that level without upstream cascading, a key figure for selective coordination studies in distribution panels. Overload protection is fixed at Ir=125A via a TM210 thermal-magnetic trip unit; short-circuit protection is fixed at Ii=10 x In (1250A). The N conductor is unprotected, and the unit includes a nut keeper kit for DC Power OEM applications in China. This is a configured variant (ZD00 suffix) for a specific OEM build, so verify the accessory kit matches your panel's bus-bar hardware.