At 240 V it's rated 187 kA, at 415 V it's 121 kA, and it still holds 75.6 kA at 500 V. That's enough headroom for most industrial service entrances and motor control centers downstream of a large transformer. At 690 V the rating drops to 3.7 kA — it's not a 690 V main breaker, but for a 480 V or 400 V line it's got plenty of muscle. That means you get remote status indication and a UVR that drops the breaker on loss of control voltage — useful for safety circuits or emergency-stop chains where you need the load isolated when the control supply dies.
The 6.5 W maximum power loss is modest; you're not cooking the enclosure, even in a sealed box with other breakers alongside it.