The Schneider Electric A9F43325 is an Acti9 iC60N miniature circuit breaker rated at 25 A with a B-curve trip characteristic, 3 poles, and a thermal-magnetic trip unit.
Breaking capacity is the headline differentiator here: 36 kA Icu at 12–133 V AC, 20 kA at 220–240 V, 10 kA at 380–415 V, and 6 kA at 440 V AC per EN/IEC 60947-2. The Icn rating under 60898-1 is 6000 A at 400 V. For DC circuits, it clears 10 kA at 100–133 V DC. The B-curve (4 x In magnetic trip, ±20%) gives it a wider magnetic-trip window than C or D curves, so it tolerates inrush from resistive loads and long cable runs better than a C-curve would.
Mounts via clip-on to a DIN rail (35 mm), occupying 6 x 9 mm pitches (54 mm wide). The 78.5 mm depth and 85 mm height fit standard distribution board cutouts. Terminals accept 1–25 mm² rigid or 1–16 mm² flexible wire; torque to 2 N·m. IP20 finger-safe terminals are standard for enclosed panels. A separate earth-leakage block (Vigi iC60) can be added on the right side for RCD protection.