It carries a 187 kA interrupting rating at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V — so the short-circuit rating drops sharply above 500 V, which matters when you're coordinating with upstream gear on a 690 V bus.
Rated continuous current Iu of 250 A is the breaker's thermal capacity at 40 °C ambient; it holds 250 A up to 50 °C, then derates to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Rated insulation voltage Ui is 800 V, so the breaker is rated for use on 690 V systems — the interrupting rating at 690 V is 5.1 kA, which is low enough that you'll want to verify the available fault current at that voltage level. The basic switch variant is 3VA2225-5HN32-0AA0.