Re: Can a Triac BTA08-600B replace a BTB04-600SL?



blackhead wrote:

I have a BTB04-600SL with the anodes giving a reading of 0 Ohms aross
them in both directions so it looks as if it's duff and decided to
replace it with BTA08-600B. But it still didn't work:-

BTB04-600SL:-

http://www.st.com/stonline/products/literature/ds/8666.pdf
4A, 10ma sensitivity on gate, tab connected to A2

BTA08-600B:-

http://www.ortodoxism.ro/datasheets/stmicroelectronics/7472.pdf
8A, 50ma sensitivity on gate, insulated tab

So I think the gate sensitivity is the main problem

It could well be.

The BTB04 is definitely a 'sensitive gate' type. Damn nuisance to replace.

Graham


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