Its interrupting capacity hits 187 kA at 240 VAC and 121 kA at 415/440 VAC — figures that tell you it can clear a bolted fault on a large transformer secondary or a high-capacity bus without the arc flashing over. At 690 V the rating drops to 4.5 kA, so this breaker is sized for 400/480 V distribution, not 690 V motor circuits. The 250 A frame carries a continuous current of 250 A across the 40–50 °C band; above that it derates to 241 A at 55 °C and 213 A at 70 °C, which governs panel ambient planning. The basic switch core is order code 3VA2225-5HL32-0AA0, so if you need a replacement internal mechanism, that's the sub-assembly to source.
The 86 mm depth leaves clearance behind the door for gland plates or a rear cable channel.