The Triac doesn't turn off when I connect it to DC voltage!

[Shahriar]

Hi

I have a Triac, "BT136" when I connect the T1 and T2 Pins to AC voltage, I can turn it off and On with giving a DC voltage to Gate Pin, but when I try to Turn On and Off a DC load, the triac Doesn't turn Off?
it remains On, till I disconnect the power!

Shold I trigger the gate with a negative pulse to turn it off? If so, How?

ThanX
Shahriar

 

[audioguru2]

Hi Shahriar,
Study how a triac works in our Articles section.
A triac is used with AC current and turns-off each hlaf-cycle when the AC passes through zero volts causing its current to drop to zero. The only way to turn it off is to cut its power or short it. Its gate won't turn it off. An SCR that is used in DC circuits is the same. ;D

 

[Shahriar]

Thank You very much
Shahriar