What this breaker is and what the ratings mean
The Siemens 3VA1116-5EE32-0AA0-ZD00 is a 3VA1 IEC frame 160 circuit breaker with breaking capacity class M, delivering an Icu of 55 kA at 415 VAC across three poles. That 55 kA rating means it can safely interrupt a fault current up to that level without failing catastrophically — critical for coordination in high-fault-capacity panels where upstream breakers are set for selectivity. The thermal-magnetic trip unit (TM220, ATFM) provides overload protection adjustable from 112 A to 160 A and a fixed short-circuit pickup at 10 x In (1600 A). The nut keeper kit is included for the DC Power OEM variant destined for China.