Gikfun PC817C PC817 Dip-4 Optocoupler for Arduino DIY (Pack of 20) AE1143

These are a mixed bag. Sure you get a lot, but I found some to be dead straight from the bag. Not sure they are genuine Sharp.

These are working fine in some sensors that I made.

Needed an optocoupler for a sensitive circuit. Decided to go all in and stock my electronics kit. I've only used two of them, but both worked flawlessly.

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These seem to be the sort of “standard” optocouplers now, the old 4n25-4n33 etc. line doesn’t have nearly as good specs. These are marked “sharp” and seem to match the manufacturer’s codes according to the data sheet, and they are marked with a rank of C, although who knows if they are authentic... so the real test was to actually measure the current transfer ratio. At a LED current of 5 mA, in my batch of 20 of these, the output current at 5v ranged from 11.7-13.7 mA with only one unit measuring lower than 12 mA. This is well within the spec of 10-20 mA for rank C. I didn’t try buying these from any other sellers so I can’t compare or vouch for anyone else but these from Gikfun, but I think it’s fair to say that these are good quality, even if they are not authentic Sharp.

work perfectly