The Siemens 3VA1132-5ED32-0AA0-ZD00 is a 3-pole IEC frame 160 molded case circuit breaker with a 55 kA interrupting capacity at 415 V (breaking capacity class M). The unit includes a nut keeper kit and is designated for DC Power OEM production in China.
The fixed Ii = 10 × In (320 A) is the magnetic instantaneous trip threshold — it clears bolted faults fast but may not coordinate with downstream branch breakers on moderate overcurrents.
Panel integration
At 32 A, no forced cooling is required, but maintain the manufacturer's recommended spacing between adjacent breakers for thermal derating — typically 10 mm on each side for full rated current. The nut keeper kit is a mechanical aid for captive screw retention during assembly, common in OEM production lines.