Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V and 440 V — that's the fault current it can safely clear without welding contacts or venting plasma into the enclosure. At 500 V it still holds 75.6 kA, and at 690 V it drops to 4.5 kA, so the voltage class of your system determines the available fault current it can handle. At 55 °C it derates to 238 A, at 60 °C to 225 A, at 65 °C to 213 A, and at 70 °C to 200 A. The 3VA2225-5JQ42-0DH0 includes a communication function, which means it can integrate with a higher-level monitoring system for remote trip indication and load management.
The 4-pole form factor means it occupies four module widths — plan your enclosure fill accordingly.