The Schneider Electric A9F68463 is an Acti9 iT60 miniature circuit breaker rated 63 A with a C curve, 4 poles, and a thermal-magnetic trip unit. The 63 A continuous rating and 4-pole format make this a main or feeder breaker for three-phase distribution panels, not a branch device for small loads. At 12–133 V AC it interrupts 36 kA Icu; at 220–240 V AC that drops to 20 kA; at 380–415 V AC it's 10 kA; and at 440 V AC it's 6 kA — all per IEC 60947-2. That's a high-interrupting rating for a 72 mm wide, 4-pole MCB — it handles industrial fault levels where a standard 6 kA or 10 kA breaker would need an upstream current-limiting fuse or a larger frame.
Snaps onto DIN rail, 72 mm wide (8 x 9 mm pitches). The removable comb busbar is already fitted — you can land feeders without extra bridging. Strip length 14 mm, torque to 3.5 N.m.