Need Help Identifying Capacitor On Kar-Tech Versa Remote

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  • grimacelord
    Badcaps Veteran
    • Jan 2017
    • 354
    • USA

    #1

    Need Help Identifying Capacitor On Kar-Tech Versa Remote

    Hello,

    I have sort of a weird one here. This is the circuit board for a Kar-Tech VERSA remote. It's a wireless transmitter for crane and other heavy equipment.

    One of the capacitors have blown and I need help finding a replacement. The capacitors are 11.4mm x 6.6mm in size and the only imprint on them is "200mΩF", which I am assuming means 200 microfarads. There is no other markings on them. I have tried doing some searching on digikey and mouser, but I can't seem to find anything like this on there or I am inputting the wrong search parameters.

    Does anyone have any idea what the full values for this capacitor is? Obviously, it seems to be 200mF, but I have no idea what the voltage is or type of capacitor it is.

    Thank you.

    Attached is some pics
    Attached Files
  • R_J
    Badcaps Legend
    • Jun 2012
    • 9514
    • Canada

    #2
    Re: Need Help Identifying Capacitor On Kar-Tech Versa Remote

    That is a current sensing resistor, 200mΩF 2512 0.2R 1% 1w

    Digikey RL73H3AR20FTDF, check if the size is correct
    Last edited by R_J; 09-08-2023, 10:31 AM.

    Comment

    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30910
      • Albion

      #3
      Re: Need Help Identifying Capacitor On Kar-Tech Versa Remote

      interesting.
      can you meter the resistance of a few of them? see if they are all under an ohm?
      i think they could be shunt resistors for monitoring current.
      if they are then you need to trace where the burned one goes because it probably go hit with an overload from a bad part or shorted wiring

      Comment

      • stj
        Great Sage 齊天大聖
        • Dec 2009
        • 30910
        • Albion

        #4
        Re: Need Help Identifying Capacitor On Kar-Tech Versa Remote

        beaten to it because i was looking at the pictures too long

        Comment

        • grimacelord
          Badcaps Veteran
          • Jan 2017
          • 354
          • USA

          #5
          Re: Need Help Identifying Capacitor On Kar-Tech Versa Remote

          Originally posted by R_J
          That is a current sensing resistor, 200mΩF 2512 0.2R 1% 1w
          Thank you!

          Comment

          • redwire
            Badcaps Legend
            • Dec 2010
            • 3900
            • Canada

            #6
            Re: Need Help Identifying Capacitor On Kar-Tech Versa Remote

            You could beep out multimeter on continuity the burnt resistor going to what connector pin, to see which load is shorted out.
            Resistors never burn up on their own - they get overloaded and burn up by a problem somewhere else...

            To me it looks much bigger than size 2512, OP would have to measure its size.

            Comment

            • R_J
              Badcaps Legend
              • Jun 2012
              • 9514
              • Canada

              #7
              Re: Need Help Identifying Capacitor On Kar-Tech Versa Remote

              Originally posted by R_J
              That is a current sensing resistor, 200mΩF 2512 0.2R 1% 1w

              Digikey RL73H3AR20FTDF, check if the size is correct

              This is too small based on the other components (BTS5215L) in the picture, it is likely a 4527, 5 or 7 watt
              Here is a datasheet that lists the size
              Here is a KOA 5Ω7watt 4527 picture, the marks etc. look the same as the 200mΩ

              There also must be a short somewhere that caused this sense resistor to burn, Find out what this line controls and check that circuit.
              Attached Files
              Last edited by R_J; 09-08-2023, 06:50 PM.

              Comment

              • redwire
                Badcaps Legend
                • Dec 2010
                • 3900
                • Canada

                #8
                Re: Need Help Identifying Capacitor On Kar-Tech Versa Remote

                The output driver IC's are high-side Profet BTS5215L.
                They are protected switches so I don't see what the sense-resistors are about, other than being the fuse here.

                I don't like this soldering either.
                Attached Files

                Comment

                • stj
                  Great Sage 齊天大聖
                  • Dec 2009
                  • 30910
                  • Albion

                  #9
                  Re: Need Help Identifying Capacitor On Kar-Tech Versa Remote

                  sense resistors can detect problems for fast shutdown.
                  like open motors/relay-coils/cabling
                  or overload caused by something jamming

                  Comment

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