What this 250 A MCCB actually delivers
That 250 A rating holds flat from 40 °C through 50 °C — no derating in a warm panel — then drops to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. For a panel builder, that means you can load it to 250 A in a typical 50 °C enclosure without oversizing. Interrupting capacity is the headline here: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V. It carries a communication function, meaning it can report status and trip events upstream — useful for a plant-wide power monitoring scheme where you want to know which feeder cleared without walking the floor. The basic switch variant is 3VA2225-6JQ32-0AA0, so this -0AJ0 suffix adds the communication interface.
How it fits — dimensions and integration
Maximum power loss is 48 W at rated current.