What it is and what it does
The Siemens 3VA1116-5GE42-0AA0-ZD00 is a 4-pole IEC frame 160 molded-case circuit breaker from the 3VA1 series, rated for line protection with a TM220 thermal-magnetic trip unit. Its headline breaking capacity is Icu=55kA at 415 V AC — class M, meaning it handles high prospective fault currents typical of industrial distribution panels without cascading failure upstream. The adjustable overload protection (Ir) spans 112 A to 160 A, and the fixed short-circuit pickup is set at 10 x In (1600 A). The N conductor is protected at 100%, and the unit includes a nut keeper kit for DC Power OEM applications in China.
Where it fits in the panel
The 3VA1 frame 160 mounts on a standard DIN rail or panel-mount footprint common to IEC distribution boards. The 4-pole configuration covers three-phase plus neutral in a single unit, saving rail space versus a 3-pole breaker plus separate neutral block. The nut keeper kit is specific to DC Power OEM builds in China — verify the gland plate and busbar layout match the frame's terminal centers before committing the panel layout.