Rated continuous current Iu is 125 A, and it holds that rating flat from 40 °C through 50 °C (–), then derates to 114 A at 70 °C. Interrupting capacity is the other headline: 121 kA at 240 V, 76 kA at 415 V, 53 kA at 440 V, and 11.9 kA at both 500 V and 690 V (–). The 11.9 kA at 690 V is the ceiling for industrial 690 V drives; if your SCCR study calls for more than that at 690 V, this breaker won't coordinate. The N-conductor protection is set at 50% — that's the factory default for the 4-pole version, meaning the neutral pole trips at half the phase current. If you need 100% neutral protection, that's a different order code.
The 130 mm height clears most 200 mm tall distribution boards. The 20,000-cycle endurance is mechanical; electrical endurance will be lower depending on the fault current cleared.