Need help to identify and to locate a 0.33 ohms fusible resistor for power supply

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  • gica69
    Member
    • Oct 2015
    • 36
    • USA

    #1

    Need help to identify and to locate a 0.33 ohms fusible resistor for power supply

    I have a quad charger that is split into 4 separate sections and one section doesn’t charge anymore. I have located what I think is a thermistor and on the shrink tube it says 125 degrees C. I cut the shrink tube and it's a 33 ohms resistor. It measures a little less than 1/2 inch in length. I am including pictures of it. Please help me identify it. So, it should test at 0.4ohms and probably go up in resistance with the rise in temp. On the board it clearly says R for resistor. But it has to be a special one.
    Resistor shows orange range silver gold and green lines.
    Thanks in advance
  • gica69
    Member
    • Oct 2015
    • 36
    • USA

    #2
    I also need help identifying another component 85A50D 6 pin IC has a U under it. There is a picture with the voltages on a live circuit. There is diode voltage drop between ground and pin 1,2 and I think 3? I looked for it and could not find anything. It's from the same power supply as above. I really appreciate any help.
    Attached Files

    Comment

    • lotas
      Badcaps Legend
      • Jan 2016
      • 4575
      • Russia

      #3
      85A50D = SC2585A

      Regarding the resistor, it is a regular current resistor, its resistance will not increase and it should be 0.33 Ohm.
      Attached Files
      Last edited by lotas; 07-22-2025, 04:48 AM.

      Comment

      • gica69
        Member
        • Oct 2015
        • 36
        • USA

        #4
        So it's not a fusible resistor, I also thought about using a regular 0.33ohms resistor but was told it has to be a fuse resistor!1
        Any word on the chip I am trying to locate?

        Comment

        • lotas
          Badcaps Legend
          • Jan 2016
          • 4575
          • Russia

          #5
          Originally posted by gica69
          Any word on the chip I am trying to locate?
          Yes, it's a tough case, I gave you full information on the chip (SC2585A) that you are looking for in post 3.

          Comment

          • gica69
            Member
            • Oct 2015
            • 36
            • USA

            #6
            Ok I am trying to learn how you found the chip. In the description it mentions Top Mark 85AWWY. So it's an 85A chip. What about the 50D does it mean anything and is there a place to identify these top marks. The chip you found is SC2585A.
            By the way thanks a lot for your help.

            Comment

            • lotas
              Badcaps Legend
              • Jan 2016
              • 4575
              • Russia

              #7
              Originally posted by gica69
              What about the 50D does it mean anything and is there a place to identify these top marks. The chip you found is SC2585A.
              It says that it is the production date.
              Attached Files

              Comment

              • gica69
                Member
                • Oct 2015
                • 36
                • USA

                #8
                Yeah I saw that.

                Comment

                • gica69
                  Member
                  • Oct 2015
                  • 36
                  • USA

                  #9
                  Can you tell me how you figured out the cross reference I know there are multiple codes for the chips from different manufacturers, and mine being 3mm by 1.5mm I saw some videos identifying it as TSOP6 and in that family there are many types SOT23-6 is one. But after that I don't know.

                  Comment

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