The Siemens 3VA1025-4ED32-0AA0-ZD00 is a 3-pole IEC frame 100 circuit breaker with breaking capacity class S, rated Icu=36kA at 415V. The 'FTFM' designation means it ships with a rotary operating handle and front-mounted terminals, and this specific variant includes a nut keeper kit for DC Power OEM applications in China.
Mounts on standard DIN rail in a distribution board or enclosure. The 3VA1 frame 100 occupies three pole spaces at roughly 27mm per pole. The TM210 thermal-magnetic trip is non-interchangeable — Ir and Ii are fixed, so this breaker is a direct drop-in for a 25A line protection position where the trip curve is already specified. The nut keeper kit is a mechanical addition for DC Power OEM builds; it prevents the terminal nuts from backing off under vibration in transport or in the final installation.