Guest Aliyu Umar Posted December 7, 2010 Report Share Posted December 7, 2010 Hi allI want to construct the attached lead acid battery charger but can't find the two Thyristors(BTY79 and C106D). Please I need help for their substitute. Quote Link to comment Share on other sites More sharing options...
awright Posted January 3, 2011 Report Share Posted January 3, 2011 Why is this question coming up again? Did you post the same question on a different forum?The answer is the same as before. There is nothing at all critical about the SCRs used in this circuit. Any voltage rating will do because you can't find an SCR with too low a voltage rating for a full wave rectified 17 volt supply. Look up the current ratings of the two specified SCRs and find replacements with at least those current ratings. Specifications for both SCRs are available on line. You can find satisfactory replacements for less than a dollar at digiKey, Mouser, and many surplus outlets like All Electronics and Alltronics.awright Quote Link to comment Share on other sites More sharing options...
qmsslab Posted January 3, 2011 Report Share Posted January 3, 2011 HiThe equivalent of those Thyristors are:BT151 == BTY79C106D == BRX46 ~ BRX49 or any 1A, 50Hz small THY.good luck. Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted January 13, 2011 Report Share Posted January 13, 2011 BTY79 NTE Replacement BTY79-800R = NTE5531 BTY79-600R = NTE5529 BTY79-500R = NTE5529 BTY79-400R = NTE5527 NTE Datasheet http://www.nteinc.com/specs/5500to5599/pdf/nte5520_31.pdf C106D = NTE5457 NTE Datasheet http://www.nteinc.com/specs/5400to5499/pdf/nte5452_58.pdf Try these suppliersDigikey --- http://www.Digikey.com Mouser --- http://www.Mouser.comNewark --- http://www.newark.comMCM Electronics --- http://www.mcmelectronics.com AmelieScott 1 Quote Link to comment Share on other sites More sharing options...
Guest Anjun Posted April 5, 2011 Report Share Posted April 5, 2011 use a TYN612 12amps 600V SCREDIT: can you please post the pcb layout?thanks! Quote Link to comment Share on other sites More sharing options...
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