The Siemens 3VA1025-3ED42-0AA0-ZD00 is a 4-pole IEC frame 100 circuit breaker rated at 25 A with a breaking capacity of 25 kA at 415 V (class N). It uses a TM210 thermal-magnetic trip unit with fixed overload protection (Ir = 25 A) and fixed short-circuit protection set at 12.8 × In. The neutral conductor is unprotected, and the unit includes a nut keeper kit for DC Power OEM applications in China.
What the Ratings Mean for Fit
The 25 kA breaking capacity at 415 V (class N) means this breaker can safely interrupt fault currents up to that level without upstream cascading — suitable for most industrial distribution panels where the available fault current stays under that threshold. The fixed Ir = 25 A and Ii = 12.8 × In (320 A short-circuit pickup) make it a dedicated line-protection device; it is not adjustable, so verify your load current matches 25 A before specifying. The unprotected neutral conductor means the neutral pole does not have overcurrent protection — typical for TN systems where the neutral is bonded to ground and not expected to carry fault current.