The A9N3P63BIN is a 3-pole miniature circuit breaker from the Acti9 xC60 range, rated 63 A with a B-curve magnetic trip characteristic (4 x In ±20 %). The 10 kA breaking capacity at 380–415 V AC (IS/IEC 60947-2) tells you it safely interrupts a fault current up to 10 kA without welding contacts or cascading upstream — adequate for most commercial and light industrial panelboards where the prospective short-circuit current stays under that threshold. At 100–125 V DC it handles 15 kA Icu, so it also works in DC sub-distribution if polarity and arc-quenching are accounted for.
The 54 mm width occupies 6 x 9 mm pitches on the rail. Biconnect tunnel terminals at the bottom accept 0.5–35 mm² rigid or 0.33–25 mm² flexible conductors; tightening torque is 3.5 N·m. Strip length 13 mm for top or bottom connection. The toggle actuator provides ON/OFF local indication.
Designed and tested to IS/IEC 60947-2, the standard for low-voltage switchgear and controlgear — specifically for circuit breakers used in distribution. Pollution degree 3 means it tolerates conductive pollution in industrial environments. Overvoltage category IV suits it for main distribution board installation.