The Siemens 3VA1150-6EF42-0AA0-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. The thermal overload pickup Ir is adjustable from 35 A to 50 A (In=50 A), and the magnetic short-circuit pickup Ii is fixed at 5 to 10 times In. The suffix ZD00 flags a DC Power OEM configuration destined for the China market.
The 160 A frame size means the physical footprint, terminal spacing, and busbar drill pattern follow the standard 3VA1 dimensions; it mounts in the same panel cutout as other 3VA1 frame-160 units. The adjustable Ir range (35 to 50 A) lets the breaker be tuned to the actual continuous load, so a single part number covers a spread of motor or feeder ratings within that window.