The Schneider Electric A9N1P40CIN is a 40 A, 1-pole miniature circuit breaker from the Acti9 xC60 range, built to IS/IEC 60947-2. At 12–48 V DC it delivers 15 kA Icu, so it works in DC sub-distribution or control power feeds too.
Clip-on mounting to a 35 mm DIN rail, 18 mm wide (2 x 9 mm pitches), 85 mm tall, 77.5 mm deep. That 77.5 mm depth means it sits flush with most standard distribution boards — no extra clearance needed behind the rail. Strip length 13 mm, tighten to 3.5 N·m.
