Three-pole, so it's for three-phase motor loads or distribution feeders. The interrupting ratings tell you where it can go: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. The adjustable thermal-magnetic trip range goes from 189 A minimum to 945 A maximum — that's the short-circuit and instantaneous pickup window, not the continuous load rating. The continuous rating stays at 63 A. So if you're protecting a motor with a 63 A FLA, the breaker's magnetic trip can be dialed to ride through inrush without nuisance tripping, but the thermal element still protects the conductor at 63 A.
That depth is the body only — add for handle throw and wiring space. The 105 mm width is three-pole standard for this frame size; check your DIN-rail or mounting-plate layout against that dimension before you drill. That gives you remote status — open/closed, tripped, and an electrical signal for the PLC or annunciator — without adding external relays.