What it is and what it does
The 3VA1080-3ED42-0AA0-ZD00: This is a Siemens 3VA1 IEC frame 100 circuit breaker, four-pole, rated 80 A with a breaking capacity of 25 kA at 415 V. It's set up for line protection with a TM210 thermal-magnetic trip — overload fixed at 80 A (Ir), short-circuit at 10 times In (Ii). The N conductor is unprotected, and it comes with a nut keeper kit for DC Power OEM applications in China.
What the ratings mean for your panel
The 25 kA Icu at 415 V tells you this breaker can safely interrupt a fault up to that level without blowing apart — that's breaking capacity class N, standard for general distribution panels. The fixed Ir at 80 A means no dial to fudge; you wire it for a load that pulls 80 A continuous. Ii at 10x In (800 A) gives a magnetic trip that clears hard shorts fast, which helps with selectivity downstream.