The Siemens 3VA1032-3ED42-0AA0-ZD00 is a 4-pole IEC frame 100 circuit breaker from the 3VA1 series, rated at 32 A with a fixed thermal overload setting (Ir=32 A) and fixed short-circuit release set to 10 x In (320 A). The 'N conductor unprotected' designation means the neutral pole is not internally protected; plan external neutral protection if the application requires it.
Mounts on standard DIN rail in the enclosure. The 4-pole form factor occupies four modular widths — factor that into gland-plate fill and busbar alignment. The included nut keeper kit aids secure busbar connection in high-vibration environments; use it rather than standard hardware. This variant is specified for DC Power OEM applications in China, so verify local short-circuit ratings if deploying outside that region.