0
\$\begingroup\$

In the AC input section of a PCB, I found a resistor (in parallel with an X capacitor) with 5 color bands:

        BLACK - GOLD - YELLOW - GRAY - BLUE(LIGHT BLUE)

Sorry because now I do not have anything to take a picture of it.

It's probably rated 2W and the PCB is made in Japan.

If I interpret it from left to right, the result is a 400 MOhms 0.25 % resistor. This is clearly wrong for a bleeder.

If I interpret it from right to left, the result is still unreasonable(68.4 Ohm). The precision is unknown as black isn't coded for any tolerance.

How should I interpret this resistor ?

\$\endgroup\$
2
  • 1
    \$\begingroup\$ What is the colour of the body of the resistor? Brown? Blue? Green? \$\endgroup\$
    – Andrew Morton
    Jul 12, 2018 at 14:37
  • \$\begingroup\$ @AndrewMorton Blue, lighter blue \$\endgroup\$
    – Long Pham
    Jul 12, 2018 at 14:39

1 Answer 1

Reset to default
8
\$\begingroup\$

It is a 680K 5% resistor. You're reading it backwards.

The black band is over the end cap, and should be on the right-hand side when reading the resistor. It is just to indicate orientation. Fairly common on Asian parts.

\$\endgroup\$
2
  • 1
    \$\begingroup\$ I can't accept an answer in 5 minutes (lol). \$\endgroup\$
    – Long Pham
    Jul 12, 2018 at 14:41
  • \$\begingroup\$ Hmmm. Strange. I haven't seen this in general guildlines. \$\endgroup\$
    – Long Pham
    Jul 12, 2018 at 14:43

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.