That rating holds at 240 V and 500 V as well, dropping to 8 kA at 690 V — still adequate for most 690 V distribution, but worth noting if you're on a high-fault 690 V bus. No ground fault detection, so that's a separate device if needed.
The 45 mm width takes one 45 mm slot in a row; 97 mm height and 96 mm depth fit a standard 200 mm deep enclosure. Any mounting position works, which helps in tight retrofit spaces. Main circuit terminals are screw-type, accepting 2x (0.25... 2.5 mm²) solid or 2x (24... 14) AWG. That's fine for the 2.5 A rating — no need to oversize the lug. Auxiliary switch terminals are transverse, and the breaker ships with an auxiliary switch — one less part to order separately.
Environment and lifecycle
Shock rated at 25g / 11 ms, so it withstands shipping and moderate panel vibration.