BT139-600G Triac Equivalent
cctalk at beyondthepale.ie
Sun Dec 17 07:24:54 CST 2017
> I have a suspicion that this component may be faulty on the input side of my
> H7826 PSU. A little tester I have does not recognise it, it is possible that
> the currents it uses are too low for this particular triac, but I am not
What is the function of this triac in your power supply?
I have come across a triac which is used to switch between 115V and 230V input
in the PSU of a DEC 3000/300. My triac went short circuit which caused some
release of magic smoke when the PSU was used on 230V. I also had difficulty
finding a replacement for it so I ended up leaving it out. The PSU worked
fine on 230V only without it once I replaced the other damaged components.
If your triac has a different function, ignore the above.
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