The 3VA1050-4ED32-0AA0-ZD00 is a Siemens 3VA1 IEC frame 100 circuit breaker with a breaking capacity class S, rated Icu=36kA at 415V. The 50A fixed thermal-magnetic trip (TM210) provides overload protection at Ir=50A and short-circuit protection at Ii=10 x In, so it trips instantaneously at 500A. The FTFM designation indicates a fixed thermal, fixed magnetic release — no adjustment dials, which simplifies spec and eliminates field tampering.
Deployment context
The nut keeper kit included is a specific add for DC Power OEM builds in China — it retains the terminal nuts during high-vibration transport or operation, a detail that matters if you are panel-building for traction or solar DC distribution.