What the ratings mean for fit
The Siemens 3VA1163-4EF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded-case circuit breaker from the 3VA1 series, with a breaking capacity class S rated at Icu=36kA at 415V AC. That 36kA interrupting rating at 415V means it can safely clear a fault current up to 36,000 amperes without welding or rupturing — critical for panel coordination where the available fault current at the line side is known to reach that level. The TM240 thermal-magnetic trip unit provides overload protection adjustable from Ir=44A to 63A (the In=63A rating), and short-circuit protection fixed at Ii=5 to 10 times In, so the magnetic pickup ranges from 315A to 630A. This gives the specifying engineer a defined selectivity window downstream of a larger upstream breaker.
Deployment context
This breaker mounts in a standard panel enclosure on a DIN rail or screw-fixed backplate, with the 4-pole configuration handling three-phase plus neutral (N conductor unprotected per the spec). The nut keeper kit for DC Power OEM in China indicates this variant was configured for a specific OEM assembly — the nut keepers prevent hardware migration under vibration in transport or operation. For a panel builder, the 4-pole footprint and the TM240 trip curve mean this breaker is sized for a 63A feeder or large motor branch circuit in a 415V distribution board.