The Schneider Electric A9KF71463BQ is a 4-pole miniature circuit breaker from the Acti9 K60 series, rated at 63 A with a C-curve trip characteristic.
The limitation class 3 rating means it restricts let-through energy well, which helps with downstream coordination — you can size downstream breakers smaller without losing selectivity. The suitability for isolation (marked on the device) means you can use it as a safe disconnection point for maintenance.
Mounting and termination
Strip length 14 mm, tighten to 3.5 N.m. The 4-pole unit is a single-width module — 72 mm wide, 81 mm tall, 70 mm deep. IP20 finger-safe front, rated for pollution degree 2 (normal industrial environment). Operating altitude up to 2000 m, relative humidity 95% at 55 °C, tropicalisation class 2 per IEC 60068-1. That covers most indoor panel conditions without derating.