The Canon MG1-5039-030 is an AC-to-DC power adapter for compatible Canon scanning equipment, converting AC input into the DC power the equipment uses.
For adapter model MG1-5039, Canon specifies AC 100–240 V input at 50/60 Hz, with DC 24.0 V output, 2.0 A current and 48.0 W power. The distributor listing identifies the exact part number as MG1-5039-030.
Canon lists the adapter model for DR-C230, DR-C240, DR-M140, DR-M160II, DR-M260, DR-S150 and DR-M1060 document scanners, plus the ScanFront 400 and CR-120, CR-150 and CR-150N cheque scanners.