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Subject: Re: TRIACS ???
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Date: 11/22/02 at 9:51 AM
Posted by: Ned Stevens
In Reply to: TRIACS ??? posted by Darren on 11/19/02 at 5:43 PM:
Vdrm is the repetitive peak off- state voltage that can be applied to the triac. It means the maximum instantaneous value of the off- state voltage which occurs across a triac, including all repetitive transient voltages. You can use a triac on DC, but the only way you could turn if off is turn off the voltage. In other words it would be counterproductive to use it on DC because it would take a switch or relay to turn of the triac. As I understand it, with AC applied to the triac and a control signal applied to the gate the triac will turn on. When the gate signal is turned off or reduced below the threshold the triac will turn of when the AC goes near 0 volts as it reverses polarity.
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