What this breaker delivers
The Siemens 3VA1150-4EF42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker from the 3VA1 series, rated for line protection with a TM240 thermal-magnetic trip unit. Overload protection (Ir) is adjustable from 35A to 50A, and short-circuit protection (Ii) is set at 5 to 10 times In (50A). The N conductor is unprotected, and the unit includes a nut keeper kit. This variant is configured for DC Power OEM applications in China.
Integration into a panel
Mounts on a DIN rail in a standard enclosure. The 4-pole configuration and frame 160 footprint determine the gland-plate space and busbar routing. Verify the nut keeper kit orientation before torquing — it secures the DC Power OEM connection in the Chinese-spec variant.