I need to replace some optocouple ( round shape plastic casing ). The optocouple which trigger a triac and control by a TTL IC, there are printing on the optocouple "MOD 725", i had desolder some good optocouple and measure both side with two output lead, the DMM show infinity in resistance,i could not figure out what kind of optocouple or any substitute on this type of optocouple. Dear members, can you give me advice on this question. Thanks and appreciate your help. Regards
Unindentify optocouple
Feb 22, 2007
2 Replies
** Groper Alert !
** Err - so this thing is how old ?? 30 or 40 years ? ** Probably long obsolete.
The MOC3021 is the go.
Its only 25 years old.
....... Phil
Hi Phil,Thanks for your help, I think about 35 years, I will try your suggestion on MOC3021.
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