Four poles handle three-phase plus neutral or a second parallel path. The breaking capacity is the headline number that decides whether this breaker clears a fault without welding or exploding: 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. At 55 °C it drops to 243.3 A, at 60 °C to 236.5 A, at 65 °C to 229 A, and at 70 °C to 223 A.
The auxiliary contact version is 2 auxiliary switches HQ (high-qualified), which gives you two form-C contacts for status feedback to the PLC or annunciator panel. A shunt trip (STL) is integrated, order code 3VA9688-0BL30 for the release coil itself — that's the part that lets an emergency-stop or remote trip signal open the breaker without a handle pull.