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Replacing U12 - U19 integrated circuits

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I bought 2 of the DIY CBT16PC kits and of course soldered half of the U series ICs backwards. When trying to unsolder them I broke more than half. I have a ticket open with support but haven't heard back from them. In the mean time, I have found what I think are the same/compatible components on eBay that I could have shipped overnight. The link for the IC is http://www.ebay.com/itm/NEW-Qty-4-MOC3023-MOC3023-M-3023-Triac-SCR-Output-Optocoupler-IC-USA-Seller-/321566677459?hash=item4adede19d3:g:f08AAOSwZkJUUE2D.


Does anyone know if these are compatible? The model number MOC3023 matches but not the second sert of chips. I also purchased a pre-built unit last year and the ICs on that match the MOC3023 but not the second set of numbers.


Just wondering if I can get the parts sooner to get my show going.


Thanks for any help/suggestions!



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I put all mine on  ic sockets; makes it easier WHEN I make a mistake


the moc3023 is the correct number


these should work from Digikey; also made by Fairchild; 



I don't know how good your soldering techniques are but: 


I use a solder sucker to remove the solder from the bottom, then maybe use solder wick to get the rest; gently wiggle the bottom of the lead to free it from the hole.

This takes practice; if you haven't done it before, best send it back to LOR


The hole the lead goes thru is called a thru whole, and you don't want to damage that or you'll need to do even more work.


either use sockets next time or before you solder, check for proper orientation

Edited by wmilkie

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