Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Maximum gate voltage on a triac

Maximum gate voltage on a triac

Maximum gate voltage on a triac

I have a TIC226D triac. I see maximum gate current on it's datasheet (50mA, if I'm not mistaken), but I need to know the maximum allowed tension.

Is there a way ?

RE: Maximum gate voltage on a triac

A triac gate is mostly resistive. Just measure the resistance and multibly with maximum allowed current.

But, since there is a current limit, just keep the gate current at a level safely below that limit. And, please, be aware that there are different specs for operation in the different quadrants with 3rd quadrant being the most demanding.

Gunnar Englund
Half full - Half empty? I don't mind. It's what in it that counts.

RE: Maximum gate voltage on a triac

Thank you, Skogsgurra

I'm not confident of the values I found

TIC226D: 63 Ohm (possibly, but unlikely damaged triac)
TIC226M: 630 Ohm (never used) (ten times more resistive. Not a typo)
Illegible power triac: 32 Ohm

Could someone back them up ?

Adding to Skogsgurra's answer: the resistance must be measured between MT1 and gate, ignoring MT2

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close