The Siemens 3VA1216-5EF42-0AA0-ZD00 is a 4-pole IEC frame 250 circuit breaker from the 3VA1 series, rated at 160 A with a breaking capacity of 55 kA at 415 V. This is the M-class breaking capacity — the middle tier in the 3VA family, sized for commercial and light-industrial distribution panels where fault currents stay under that threshold. Overload protection is adjustable via the TM240 thermal-magnetic trip unit from 112 A to 160 A; short-circuit pickup is set between 5 and 10 times the rated current In.
What the ratings mean for fit
The 55 kA Icu at 415 V is the maximum short-circuit current the breaker can interrupt once without needing replacement. That rating governs panel SCCR coordination — if the available fault current at the breaker's location exceeds 55 kA, you need an upstream current-limiting device or a higher-class (H-class) 3VA frame. The 4-pole construction with N conductor unprotected means the neutral is switched but has no integral overcurrent protection; that is standard for TN-S or TN-C-S systems where the neutral is bonded to ground at the source and not expected to carry fault current. The nut keeper kit and the DC Power OEM in China notation in the description suggest this variant was configured for an OEM panel builder, possibly for a DC-bus distribution application. The nut keeper kit simplifies terminal torquing in production — a detail that matters if you are replicating a BOM line that expects that hardware included.