Resistor Identification

Discussion in 'General Electronics Chat' started by bwilliams60, Feb 10, 2014.

  1. bwilliams60

    Thread Starter Active Member

    Nov 18, 2012
    I came across a pile of electronics parts that were thrown out and am going through them and sorting them out. I have what I believe is a resistor. It is rust colored and marked 100R and +/-5%. I'm sure someone can help identify them and where would they have been used. Sorry, I'm a newbie, guilty!
  2. Mike33

    AAC Fanatic!

    Feb 4, 2005
    No problem, everyone is/was a newbie at some point, bwilliams!!

    That would appear to be a 100 ohm resistor, with a +/- 5% tolerance. So it's 95 to 105 ohms...

    They often put an "R" after resistors whose values are less than 1,000 ohms, after which they get a "K" suffix. Ex: 47,000 ohms = 47k. The "R" helps you know what range it's in, and sort of provides an identifier that it is a resistor.

    Can you post a pic? Sounds like a power resistor, if it's big enough for writing rather than colored bands. And, any other unidentified things can be put in a photo for here, as well.
  3. MrChips


    Oct 2, 2009
    100R suggests that the resistance is 100 ohms. This can be easily verified using an ohmmeter.