It carries an interrupting capacity of 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V — so the available fault current at the panel bus determines which voltage column governs the install. The 250 A rating holds flat from 40 °C through 50 °C, then derates to 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C; if the enclosure ambient runs above 50 °C, the continuous load must be trimmed accordingly.
The breaker measures 70 mm deep, 140 mm wide, and 158 mm high — a 4-pole frame that occupies roughly the same footprint as other SENTRON 3VA fixed-thermal units.