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. 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
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.