The Siemens 3VA1120-4GF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker from the 3VA1 series, configured for line protection with a TM240 thermal-magnetic trip unit. Rated In is 20 A, with overload protection adjustable from Ir=14 A to 20 A via the ATAM dial, and short-circuit protection fixed at Ii=8 to 16 times In (160 to 320 A). The N conductor is protected at 100% (full-rated), and the unit includes a nut keeper kit specified for DC Power OEM builds in China.
Deployment context
As a 4-pole IEC frame 160 MCCB, this breaker mounts into a panelboard or enclosure on a DIN rail or direct-mount base. The nut keeper kit indicates it is prepared for DC Power OEM integration, likely in a pre-wired assembly.