The 250 A rating holds flat from 40 °C through 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. Breaking capacity steps down with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V.
Dimensions are 181 mm height, 140 mm width, 86 mm depth — a standard SENTRON 3VA2 frame footprint. The 86 mm depth includes the breaker body; allow additional clearance for the rotary handle and rear terminals. No undervoltage release is installed. The basic switch order code is 3VA2225-5HN42-0AA0 if you need the bare breaker without auxiliaries. Maximum power loss is 48 W at rated current — account for this in your enclosure thermal calculation, especially if the panel is sealed or has limited ventilation.