Connect with us

What are these?

Discussion in 'General Electronics Discussion' started by gunnadoo, Dec 21, 2017.

Scroll to continue with content
  1. gunnadoo

    gunnadoo

    17
    1
    Nov 9, 2017
    hi, i have been playing around with a 10A psu to try and learn. thinking the lm396 reg had shorted i tried a lm317 and still had a short . so by trial and elimination , i traced the problem to this "zener" looking thing . the regulator seems to work ok without it , but i would like to know what it does. it is connected between + output and neg rail . the other black "diode" type thing [paralled with light bulb] is on a different set of output wires.which won't be used , but i am curious. it measures 1-ohm each way. sorry for any confusion zener 006.jpg zener diode.jpg 1-ohm something.jpg
     
  2. kellys_eye

    kellys_eye

    4,276
    1,146
    Jun 25, 2010
    Transient suppressor - rated at a value to limit either the output being over-voltage or to protect it from an externally supplied voltage exceeding its rating (capacitors on the output terminals).

    If it's shorted then it's done its job! Replace with suitably rated equivalent if you can't find the details of the original device.
     
  3. gunnadoo

    gunnadoo

    17
    1
    Nov 9, 2017
    thanks, i did lots of googling and there is a myriad of different types of suppressors but i couldnt find anything which looks like the above. without really knowing what i am looking for, would something like a tvs diode [1.5kw EL 18 CA] do the job. the unit is 15 V max output.. thanks
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-