The Siemens 3VA1116-3EE42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker rated for line protection, with a breaking capacity class N achieving Icu=25kA at 415 V. It carries a thermal-magnetic trip unit (TM220, ATFM) with an In=160 A rating, overload protection adjustable Ir=112 A...160 A, and fixed short-circuit protection set at Ii=10 x In. The neutral conductor is unprotected on this variant, and it ships with a nut keeper kit for DC Power OEM applications in China.
What the Ratings Mean for Fit
The Icu=25 kA at 415 V defines the maximum short-circuit current the breaker can safely interrupt once under fault conditions — critical for verifying SCCR coordination with upstream gear in a panel. The adjustable Ir (112–160 A) lets you dial in the continuous current protection to match the actual load without swapping the breaker body, which is useful when the connected load is below the full 160 A frame. The fixed Ii=10 x In (1600 A magnetic pickup) means the instantaneous trip is non-adjustable; if your inrush or starting current exceeds that multiple, you need a different trip curve or a higher frame. The unprotected neutral conductor signals this is a 3-pole + switched neutral configuration — the neutral pole does not have overload or short-circuit protection, so it must be sized and coordinated accordingly in the distribution design.
Deployment Context
This is a panel-mount MCCB for IEC distribution — typically installed on a DIN rail or bolted into a switchboard enclosure. The nut keeper kit indicates it is prepared for DC Power OEM builds, likely in a solar combiner box or battery distribution panel where the DC rating and the China-origin kit simplify procurement for that supply chain.