What this breaker is and what it does
The Siemens 3VA1196-5EE32-0AA0-ZD00 is a 3-pole IEC frame 160 molded-case circuit breaker with a breaking capacity class M rating of Icu=55kA at 415V. It is configured for line protection with a TM220 thermal-magnetic trip unit, ATFM (adjustable thermal fixed magnetic) function, and a rated current In=16A. Overload protection (Ir) is adjustable from 11A to 16A; short-circuit protection (Ii) is fixed at 20 x In. The suffix ZD00 indicates a nut keeper kit included for DC Power OEM applications in China.
What the ratings mean for fit
The 55kA Icu at 415V places this breaker in breaking capacity class M, suitable for high-fault industrial distribution panels where upstream fault current can reach that level. The TM220 trip unit provides thermal-magnetic protection: the thermal element handles overloads (Ir adjustable 11-16A), while the fixed magnetic element (Ii=20 x In) clears short-circuits. The 3-pole configuration fits three-phase line protection. The nut keeper kit (ZD00 suffix) is a mechanical accessory for secure mounting in DC Power OEM builds — not a functional electrical difference.