It's a 3-pole unit rated at 50 A continuous at ambient temperatures up to 50 °C, with a slight derating curve above that — 49 A at 55 °C, 48 A at 60 °C, down to 45 A at 70 °C. That derating matters if you're packing this into a warm enclosure; plan your load accordingly. The interrupting ratings are substantial: 220 kA at 240 V AC, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That's a high-fault-current breaker — it'll clear a dead short without upstream coordination headaches in most industrial panels.
The 70 mm depth means it clears shallow backpanels without gland-plate interference.