The Siemens 3VA1163-5GF42-0AA0-ZD00 is a 4-pole molded case circuit breaker in the 3VA1 IEC frame 160 platform, with a breaking capacity class M rating of Icu=55kA at 415 V. It is fitted with a TM240 ATAM thermal-magnetic trip unit set at In=63 A, with adjustable overload protection Ir=44 A...63 A and short-circuit protection Ii=5...10 x In. The N-conductor is protected at 100%, and the unit includes a nut keeper kit; this variant is configured for DC Power OEM applications in China.
What the ratings mean for fit
The 55 kA Icu at 415 V places this breaker in breaking capacity class M under IEC 60947-2, meaning it can safely interrupt a fault current up to that level without damage. For a 63 A frame, that is substantial headroom — it handles high prospective fault currents common in industrial distribution without needing an upstream current-limiting device. The adjustable Ir (44–63 A) lets you fine-tune the overload pickup to the actual load, and the Ii range (5–10 x In, so 315–630 A) sets the magnetic instantaneous trip point. The 100% N-conductor protection means the neutral pole is fully rated, not reduced — required on circuits where the neutral carries harmonic or unbalanced current.
Deployment context
This MCCB mounts in a standard panel or enclosure on a DIN rail or bolted directly to a mounting plate. The 4-pole configuration suits three-phase plus neutral distribution, and the DC Power OEM designation points to use in DC-side protection within power-conversion equipment — likely in Chinese-manufactured solar inverters, battery storage systems, or rectifier cabinets.