REplacement resistor........what to order?

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  • Welchs101
    Badcaps Veteran
    • Sep 2008
    • 979
    • USA

    #1

    REplacement resistor........what to order?

    See encosed pic.

    I need to order a replacement resistor for the resistor shown in the enclosed pic. I know i cant just order any old resistor due to current limits......any idea on what i should order?

    Does the color of the body of the resistor indicate anything on what i should order?
    Attached Files
  • PlainBill
    Badcaps Legend
    • Feb 2009
    • 7034
    • USA

    #2
    Re: REplacement resistor........what to order?

    Originally posted by Welchs101
    See encosed pic.

    I need to order a replacement resistor for the resistor shown in the enclosed pic. I know i cant just order any old resistor due to current limits......any idea on what i should order?

    Does the color of the body of the resistor indicate anything on what i should order?
    It's a power resistor, probably metal film, 1 or 2 watt. Measure it's size; that will tell you it's power rating. If I read the color bands properly, it's a red, green, brown, gold, so it's a 150 ohm, 5% tolerance.

    PlainBill
    For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

    Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

    Comment

    • smason
      Badcaps Legend
      • Feb 2010
      • 1652
      • Canada

      #3
      Re: REplacement resistor........what to order?

      If it's marked 150 and measures 150, why replace it?
      36 Monitors, 3 TVs, 4 Laptops, 1 motherboard, 1 Printer, 1 iMac, 2 hard drive docks and one IP Phone repaired so far....

      Comment

      • Welchs101
        Badcaps Veteran
        • Sep 2008
        • 979
        • USA

        #4
        Re: REplacement resistor........what to order?

        I looked up the 1W, 2W, and 3W metal film resistors on digikey. Links are below: Why is the 2W so much more than the 1W or 3W? Could also put in a 3W.........that wont hurt anything will it? I still need to measure the physical dimensions.........cant do it right now......i dont have board right now.

        1W:
        http://search.digikey.com/scripts/Dk...PPC150W-1CT-ND

        2W:
        http://search.digikey.com/scripts/Dk...PPC150W-2CT-ND

        3W:
        http://search.digikey.com/scripts/Dk...PC150W-3JCT-ND

        Comment

        • shadow
          Badcaps Veteran
          • Feb 2007
          • 732
          • Australia

          #5
          Re: REplacement resistor........what to order?

          A 3W resistor will probably be physically larger so you need to be careful that it actually fits in. Besides that the only effect will be that it will be cooler than a 2W resistor.

          Comment

          • stj
            Great Sage 齊天大聖
            • Dec 2009
            • 30963
            • Albion

            #6
            Re: REplacement resistor........what to order?

            that's a fuseable safety resistor.

            if it meters o.k. leave alone - never replace with a metal-oxide or carbon one.
            the difference will be the size of the flame if anything goes wrong!

            Comment

            • Welchs101
              Badcaps Veteran
              • Sep 2008
              • 979
              • USA

              #7
              Re: REplacement resistor........what to order?

              but metal-film is ok......right?

              I have two boards. Well, actually my friend has one board and i have another. They are exactly the same. On his board the resistor "lead" is broken and he can not solder back into board. So he needs to replace it. Also, underneath his board where the resistor goes....the metal has lifted so he needs another resistor with a longer lead so he can solder it to some metal on the same trace. Hope this clears up why i need the new resistor.

              Comment

              • PlainBill
                Badcaps Legend
                • Feb 2009
                • 7034
                • USA

                #8
                Re: REplacement resistor........what to order?

                Originally posted by Welchs101
                but metal-film is ok......right?

                I have two boards. Well, actually my friend has one board and i have another. They are exactly the same. On his board the resistor "lead" is broken and he can not solder back into board. So he needs to replace it. Also, underneath his board where the resistor goes....the metal has lifted so he needs another resistor with a longer lead so he can solder it to some metal on the same trace. Hope this clears up why i need the new resistor.
                No. STJ identified it as a fuseable safety resistor. If it draws too much current it will safely go open. Non-fuseable resistors tend to do nasty things. Things like suddenly decrease in resistance, arc, spread hot bits of metal film around, or possible burst into flame.

                PlainBill
                For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                Comment

                • stj
                  Great Sage 齊天大聖
                  • Dec 2009
                  • 30963
                  • Albion

                  #9
                  Re: REplacement resistor........what to order?

                  you can replace it with another fuseable one.
                  they are metal-oxide but they are special - they are designed to fail without catching fire.

                  that's why they are coated with cement instead of being dipped in resin.

                  Comment

                  • Welchs101
                    Badcaps Veteran
                    • Sep 2008
                    • 979
                    • USA

                    #10
                    Re: REplacement resistor........what to order?

                    Can you suggest a replacement.

                    Thanks for the info.

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 30963
                      • Albion

                      #11
                      Re: REplacement resistor........what to order?

                      i just did - 150ohm fuseable resistor.
                      how big is it in mm?

                      Comment

                      • Welchs101
                        Badcaps Veteran
                        • Sep 2008
                        • 979
                        • USA

                        #12
                        Re: REplacement resistor........what to order?

                        I dont have the board handy.........i will have it tomorrow afternoon. I will measure it then. thanks.

                        Comment

                        • Welchs101
                          Badcaps Veteran
                          • Sep 2008
                          • 979
                          • USA

                          #13
                          Re: REplacement resistor........what to order?

                          The resistor is about 11mm long by about 4 to 4.3mm in diameter.

                          Comment

                          • stj
                            Great Sage 齊天大聖
                            • Dec 2009
                            • 30963
                            • Albion

                            #14
                            Re: REplacement resistor........what to order?

                            probably 2w then.

                            Comment

                            • Welchs101
                              Badcaps Veteran
                              • Sep 2008
                              • 979
                              • USA

                              #15
                              Re: REplacement resistor........what to order?

                              Just now getting around to placing an order.

                              So should i order the 3W just to be sure or go with the 2W?

                              Here is the 2W:
                              http://search.digikey.com/scripts/Dk...e=P150W-2BK-ND

                              Here is the 3W:
                              http://search.digikey.com/scripts/Dk...e=P150W-3BK-ND

                              Comment

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