Finding proper replacement rectifier

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  • unimatrix93
    Badcaps Veteran
    • Oct 2021
    • 360
    • Magyarország
    #1

    Finding proper replacement rectifier

    Hello everyone,

    I'm trying to fix up my battery charger. Where I found a dead schottky rectifier.

    This is the dead component PTR30L120CTF:
    PTR30L120CTF datasheet(1/7 Pages) PFC | 30A 120V HPTR Schottky Rectifier (alldatasheet.com)

    And I have a spare 30CPQ150:
    30CPQ150 datasheet(1/5 Pages) IRF | SCHOTTKY RECTIFIER (alldatasheet.com)

    Can I use this diode as a replacement or if not, can you recommend me a proper replacement?
    I cannot find the exact unit anywhere besides aliexpress and such.

    Thank you guys!
    ​
    Tags: None
    • Answer selected by unimatrix93 at 03-06-2024, 01:52 AM.
      truclacicr
      Badcaps Veteran
      • Apr 2019
      • 356
      • australia
      Looks good to me.
        • Selected Answer

        Comment

        • truclacicr
          Badcaps Veteran
          • Apr 2019
          • 356
          • australia
          #2
          Looks good to me.
            • Selected Answer

            Comment

            • redwire
              Badcaps Legend
              • Dec 2010
              • 3912
              • Canada
              #3
              What make/model is the battery charger?
              The IR part will run 20% hotter at 15A, it is lower efficiency, higher voltage (drop).

                Comment

                • unimatrix93
                  Badcaps Veteran
                  • Oct 2021
                  • 360
                  • Magyarország
                  #4
                  Originally posted by truclacicr
                  Looks good to me.
                  Thank you!

                    Comment

                    • unimatrix93
                      Badcaps Veteran
                      • Oct 2021
                      • 360
                      • Magyarország
                      #5
                      Originally posted by redwire
                      What make/model is the battery charger?
                      The IR part will run 20% hotter at 15A, it is lower efficiency, higher voltage (drop).
                      It's a Husqvarna QC330 battery charger.

                      It's cooled by a heatsink + fan, so I hope it's will endure.

                        Comment

                        • redwire
                          Badcaps Legend
                          • Dec 2010
                          • 3912
                          • Canada
                          #6
                          OK I'd asked to know the battery voltage because 120V 30A Schottky is a bit high voltage so I was wondering.
                          Higher PIV voltage diodes have a higher voltage drop and thus a bit more heat. But it's got a fan and the new diodes are bigger TO-247 (vs TO-220) with heatsink compound should run fine.

                          Husqvarna QC330 is not a reliable charger, many complaints about it. Seems to be 36V 330W for 2.5Ah cells in BLi100.

                            Comment

                            • stj
                              Great Sage 齊天大聖
                              • Dec 2009
                              • 31294
                              • Albion
                              #7
                              schottky's need to be rated very high - ideally 10x the actual voltage because even a short spike above the rating can damage them.

                                Comment

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