Triacs for CMB24D and CTB16PC

[Mr. P]

Anyone have any knowledge on the specs and/or where we can purchase the triacs for these two controllers? I had two go bad on a CMB24 and the turn around time to have them repaired is three weeks. If anyone has the specs so I can find some and have shipped overnight I will replace them myself.

[Max-Paul]

First and most important I have to ask you do you realize that one controller is a D.C. controller? And the other one is an A.C. controller. A triac only works with A.C. circuits. While a transistor or MOSFET.  Read the numbers on both and google. Or call LOR and ask them about acquiring some from them.  Remember my friend, google is your friend.

[Mike G]

For the ac controller use Mouser part number 511-BTA24-600BW

[vkjohnson]

Purchase Link... http://www.mouser.com/ProductDetail/STMicroelectronics/BTA24-600BWRG/?qs=%2fha2pyFaduhJWmQLLbJCkosy8WljcCCH5x5IWJaQjZS9mvX3DRUF%252bg%3d%3d

[Mr. P]

Thanks for the info, I ordered the triacs and found the mosfets and will have them on Tuesday so everything should be back up and running Tuesday night.

 

I know LOR is busy especially this time of the year but I can't wait three weeks for a turn around as that would kill the entire season. I also ordered another CMB24 just to have on hand for a quick change out.

[zeighty]

I have a few that I will be replaced in the off season. Does anyone have an opinion on using sockets for the triacs? It would be nice to have the flexibility to unscrew the heat sink and pop a new one in. 

[Gordon Starr]

My question is why are these blowing?  Unless they get shorted or are loaded by too much current, they should be fine and you shouidn't need to replace them.  I would not use sockets for them. Just my $.02

[Max-Paul]

Problem with sockets is that A) another failure point. B ) a slight amount of corrosion can cause a failure.

Edited December 11, 2014 by Max-Paul

[zeighty]

Problem with sockets is that A) another failure point. B ) a slight amount of corrosion can cause a failure.

I agree, but believe A and B are solvable challenges. For example, how about really good sockets? 

As for A - sockets are used in many applications without failure, or very low incidence of failure. B could be solved with high quality sockets, perhaps gold plated contacts.

 

I would be willing to be a beta (heck even Alpha) tester.  

[plasmadrive]

I just replaced a triac yesterday for the first time.  Ever look at how those boards are made?  There is no physical way to put a socket in there unless you use shorter spacers to hold up the board.  The triacs are pushed all the way down until the heavier part of the lead is flush with the top of the board.  The board, BTW, is very close toleranced in the thru hole dept.... ie... the triac leads are a pretty snug fit.  You would have to find sockets that fit the holes.

 

However.. with all that physical issue thing Max is 100% correct.  Socketing those triacs is not a good judgement call from a reliability stand point...

[Max-Paul]

Ok so you have gold contacts in the sockets. What you going to do about the leads on the Triacs? They are just tin plated. And most of us put our controllers outside in the weather. This usually causes the tin to oxide a wee bit faster. But you do what you want to do. But I believe you asked what we think. So I told you what I think. Now you go a head and prove me wrong, or take my advice.

[TonyD]

Anyone have any knowledge on the specs and/or where we can purchase the triacs for these two controllers? I had two go bad on a CMB24 and the turn around time to have them repaired is three weeks. If anyone has the specs so I can find some and have shipped overnight I will replace them myself.

 

LOR sent me several transistors (for free) in about 3 days. It might be a 3 week turnaround to fix something but they will ship you the parts for free right away.

Edited December 13, 2014 by TonyD

[zeighty]

Ok so you have gold contacts in the sockets. What you going to do about the leads on the Triacs? They are just tin plated. And most of us put our controllers outside in the weather. This usually causes the tin to oxide a wee bit faster. But you do what you want to do. But I believe you asked what we think. So I told you what I think. Now you go a head and prove me wrong, or take my advice.

Max, 

I thought that we (all participants) were having "conversation' via the forum. You know, bounce ideas off of one another and see what is what.  I did ask your opinions and I respect them.  I replied and welcome responses and even rebuttal. But the text from your reply  that I have bolded leads me to believe that you somehow think that I am being argumentative and somehow disrespectful.  

 

Please help me understand your reply and if you believe that I have somehow shown you disrespect please explain.   

 

 

[Max-Paul]

zeighty,

Maybe I am being a bit touchy. But realize this. I am 55 and been in one form or another a trouble shooter. Everything from transmitters and receivers for Uncle Sam to factory related equipment. Speaking of gold plated sockets with tin plated ICs. This was a group of 3 spindle 5 axis mills. Every spring and fall they would start to have problems. The usual fix was to reseat the ICs in their sockets and the boards in the cages.

 

I told you that sockets are a bad idea. You then suggested gold plated sockets might be the ticket.  So I told you go ahead and be the beta tester. Just realize as plasma points out. physically this will change things and one of them is that the High wattage heat sink might not fit on the board any more. But dont worry about it. We have had a whole lot of people wanting to reinvent the wheel. Lets leave the wheel round like a doughnut. But we can play around with the thread some.