10PCS PC817B SMD-4 PC817 SOP-4 Optocoupler Integrated Circuits Chip

2pcs 4 Channel 12V Relay Module with Optocoupler High or Low Level Trigger Ex...

2PCS 4 Channel 5V Relay Module with Optocoupler High or Low Level Trigger Exp...

EL1013(TA)-VG SOP-4 OPTOCOUPLER

Dell Optiplex GX260 PC Computer IDE Optical Disc Drive Cable CN-08T817

Desktop Computer G C E NA V50 NBX0000LL00, Da/N 817XP LED Board & Cable Board

2 pcs 5V 2 Channel DC 5V Relay Module with Optocoupler High/Low Level Trigger...

5PCS AQY212GHAX AQY212GH DIP-4 Code: 212GH Optocoupler Solid State Relay