The Siemens 3VA1150-3EE32-0AA0-ZD00 is a 3-pole IEC frame 160 circuit breaker in the 3VA1 series, rated 50 A continuous with a TM220 thermal-magnetic trip unit. The overload protection Ir is adjustable from 35 A to 50 A, and the short-circuit protection Ii is fixed at 10 × In (500 A).
This breaker mounts on a DIN rail in a standard distribution or motor control center enclosure. The included nut keeper kit is specified for DC Power OEM builds in China — that's a factory-fit accessory for captive nut retention on the busbar connection, saving panel builders time during assembly.