The Schneider Electric A9F05250 is an Acti9 iC60N miniature circuit-breaker (MCB) rated 50 A with a D tripping curve, 2 poles, and a 36 kA ultimate breaking capacity (Icu) at 12–133 V AC. It's certified to both EN/IEC 60947-2 (industrial) and EN/IEC 60898-1 (domestic/light commercial), so it qualifies for isolation duty per both standards.
Deployment and integration
Snaps onto a DIN rail — 36 mm wide, 4 x 9 mm pitches, 91 mm tall, 78.5 mm deep. The double terminals on top and bottom accept 1–35 mm² rigid or 1–25 mm² flexible, with a 14 mm strip length and 3.5 N·m tightening torque. Overvoltage category IV suits it for the main distribution board, not just sub-panels.
