I want to know the purpose of a component named "EL 8+7 G8025" which was found inside a Nokia charger.

Blurry photo

  • 2
    \$\begingroup\$ That is not exactly a sharp foto, but it shows that the component is across an isolation gap in the bord, which supports Sperho's idea that it could be an optocoupler (the 817 is a jellybean optocoupler). \$\endgroup\$ Oct 26, 2014 at 13:39
  • \$\begingroup\$ A clearer photo is definitely required here. \$\endgroup\$
    – David
    Oct 26, 2014 at 15:19
  • \$\begingroup\$ Apologies for the photo quality. I have tried my level best to upload a clearer picture. \$\endgroup\$
    – Adithya
    Oct 26, 2014 at 15:49

1 Answer 1


Possibly an EL817 optocoupler, but I'll reserve final judgement until I see the photo. If it's a semiconductor the only common 4-pin parts used in this sort of application are bridge rectifiers and opto-couplers. There are other 4-pin parts such as common-mode chokes, but they look different.

enter image description here

Bridge rectifiers look more like this:


  • 1
    \$\begingroup\$ Yeah,it is a EL 817 chip. I couldn't read it properly with naked eyes. It is an opto-coupler,then! Thank you. \$\endgroup\$
    – Adithya
    Oct 26, 2014 at 13:44
  • \$\begingroup\$ @user3347036 if this answered your question you should accept it an the answer. The person posting the answer gets points for their effort. \$\endgroup\$ Oct 26, 2014 at 15:42
  • \$\begingroup\$ Done..........! \$\endgroup\$
    – Adithya
    Oct 26, 2014 at 15:46

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