transistor ON 724 PHILIPS

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  • ut-norm
    Senior Member
    • Nov 2019
    • 67
    • italia

    #1

    transistor ON 724 PHILIPS

    Hi do you know the characteristics of this transistor? Thanks for the reply
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  • ut-norm
    Senior Member
    • Nov 2019
    • 67
    • italia

    #2
    Re: transistor ON 724 PHILIPS

    The title is wrong, the marking is:ON 724
    I apologize for the mistake

    Comment

    • R_J
      Badcaps Legend
      • Jun 2012
      • 9535
      • Canada

      #3
      Re: transistor ON 724 PHILIPS

      What is it used in? Make , Model, maybe you have a schematic? I see this is not a picture of your component
      Last edited by R_J; 11-12-2022, 06:50 PM.

      Comment

      • petehall347
        Badcaps Legend
        • Jan 2015
        • 4426
        • United Kingdom

        #4
        Re: transistor ON 724 PHILIPS

        maybe email philips and ask them for a datasheet

        Comment

        • redwire
          Badcaps Legend
          • Dec 2010
          • 3902
          • Canada

          #5
          Re: transistor ON 724 PHILIPS

          I found nothing on ON724 Philips transistor, it must be a house number as Philips power transistors are usually prefixed BU, BUS, BUZ etc.
          Did see same "date code" on a BUS14A. OP's pic looks like a clone from aliexpress but store 15814935579 does not exist.
          BUY72-4 has "724" as vert. defl. tranny.

          Comment

          • sam_sam_sam
            Badcaps Legend
            • Jul 2011
            • 6030
            • USA

            #6
            Re: transistor ON 724 PHILIPS

            I found something that says that it is a mosfet but I could not find a data sheet for it

            Comment

            • ut-norm
              Senior Member
              • Nov 2019
              • 67
              • italia

              #7
              Re: transistor ON 724 PHILIPS

              Thank you for your prompt replies. The ON724 is mounted in an old oil burner control board that works well. Unfortunately, I no longer have that board. I'll see if I can post a photo. I just wanted to know the features of this component not having found the datasheet. The electronics of this card are very dated. In addition to the ON724 there is another transistor but in a TO5 container that starts with ON but I don't remember the rest of the initials.
              I found this link on the net

              https://www.jotrin.com/product/parts/ON724

              Comment

              • R_J
                Badcaps Legend
                • Jun 2012
                • 9535
                • Canada

                #8
                Re: transistor ON 724 PHILIPS

                I agree, it is likely a custom/in house number for the company that made the controller

                Comment

                • redwire
                  Badcaps Legend
                  • Dec 2010
                  • 3902
                  • Canada

                  #9
                  Re: transistor ON 724 PHILIPS

                  For an oil burner controller, the only specialty power transistor that I can think of would be for the igniter. In the mid-80's a high voltage Darlington was used like old MJ10012, BU941ZPFI
                  The ones with built-in clamp zener are best for when the spark gap gets too big, the transistor is protected.

                  Unless the burner board uses CDI HV inverter or mains for the ignition?
                  The fuel solenoid valve does not need that much current.

                  Comment

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