The adjustable thermal overload band of 38 A minimum to 300 A maximum covers a wide range of downstream loads, but the breaker frame itself is sized for the 25 A continuous path — the 300 A top end is the magnetic trip setting, not the continuous ampacity. The interrupting ratings are the real headline: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. That ground-fault feature is useful for detecting leakage on ungrounded or high-resistance-grounded systems without an external GF relay.
Panel integration
The 3-pole design means it occupies three module widths — plan for a 105 mm slot in your enclosure layout.