The Siemens 3VM1025-4ED42-0AA0 is a 4-pole IEC frame 100 molded-case circuit breaker rated for 25 A continuous current with a 36 kA interrupting capacity at 415 V AC (breaking capacity class S). The TM210 thermal-magnetic trip unit provides fixed overload protection at Ir=25 A and a fixed short-circuit pickup at Ii=12.8 × In — no adjustment dials, which simplifies specification but locks the coordination curve. The N conductor is unprotected (no integral overload sensing on the neutral pole), so this breaker suits 3-phase + N applications where neutral protection is handled separately or not required.
Integration notes
The 4-pole footprint occupies roughly 150 × 119 × 116 mm. For selectivity studies, the fixed Ii=320 A (12.8 × 25 A) and the 36 kA SCCR at 415 V give a known coordination point with upstream devices; verify the let-through energy against the downstream distribution board.