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EGO 56V electric lawnmower, blown 40A 250V fuse

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    EGO 56V electric lawnmower, blown 40A 250V fuse

    Good morning. I'm working on an EGO brand 56V electric lawnmower like this one.
    https://www.homedepot.com/p/EGO-21-i...02SP/206515944

    I found the 40A 250V ceramic fuse to be blown. I temporarily jumped it with a 35A blade fuse and it powered on and worked.

    The fuse in question is a Schurter SUT series slow-blow fuse with pigtails for through hole mounting. When I look up the SUT series of fuses, they only show a range of 12A-30A. I'm having trouble finding an appropriate fuse. I don't have the knowledge to find a suitable replacement on my own.

    Here is the data sheet for the SUT series of fuses.
    https://cdn.badcaps-static.com/pdfs/...21042e2a76.pdf

    I don't really care if the fuse has the same package as long as it works the same. I don't have the mower in front of me at the moment, but the PCB that the fuse was mounted to has pads for a smaller surface mount fuse if I could find one of the appropriate size. I'll measure the distance from pad to pad when I get back to the mower.

    In the time being, I would really appreciate it if any of you with a better understanding could help me out.

    Thanks guys.
    Last edited by johnboy1313; 05-31-2018, 07:49 AM.

    #2
    Re: EGO 56V electric lawnmower, blown 40A 250V fuse

    The only thing that Digikey has that is similar is this: https://www.digikey.ca/product-detai...785-ND/2518690
    However, this is a fast blow, not a slow blow...

    Or this:
    https://www.digikey.ca/product-detai...792-ND/2515916
    https://www.digikey.ca/product-detai...0801-ND/701068
    These are a slow blow.

    I'd probably change the fuse holder to accept blade fuses and take a bunch of those fuses of the last link.

    Comment


      #3
      Re: EGO 56V electric lawnmower, blown 40A 250V fuse

      Can we see the circuit board that the fuse is soldered on to?
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

      Comment


        #4
        Re: EGO 56V electric lawnmower, blown 40A 250V fuse

        if you can mount it, how about using a domestic circuit breaker??
        or use the fuses sold for car audio.
        Last edited by stj; 06-02-2018, 03:12 AM.

        Comment


          #5
          Re: EGO 56V electric lawnmower, blown 40A 250V fuse

          Originally posted by stj View Post
          if you can mount it, how about using a domestic circuit breaker??
          or use the fuses sold for car audio.
          I don't know if either of those would be a good idea.

          Looking at the product from the link in post #1, this appears to be battery operated (Li-ion) @ 56V. This means car fuses may not be a good idea, as the DC voltage is quite a bit higher and may arc-over badly in case of a quick-blow / disconnect event.
          Likewise, a house breaker is rated for AC current, so again, I'm not sure if disconnecting high-current DC voltage would do it any good.

          It's best to go with same rating and type of fuse. Of course, if you cannot find the same package / size of fuse but can otherwise match the current, voltage, and type of fuse, then going with a different package is okay - even if you run the fuse with thick wires / leads to get it connected properly.

          Comment


            #6
            Re: EGO 56V electric lawnmower, blown 40A 250V fuse

            I found a Bussman 3AG glass fuse that should work. MDL-40. The data sheet only goes up to 30A. I'll have to mount the fuse a little differently as the replacements don't have any leads.

            https://cdn.badcaps-static.com/pdfs/...e500281c7a.pdf

            I've attached a pic of the board.
            Attached Files

            Comment


              #7
              Re: EGO 56V electric lawnmower, blown 40A 250V fuse

              the car audio fuses i'm talking about are big glass ones - they sometimes show up in other places like my old UPS.

              not regular blade fuses.

              Comment


                #8
                Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                Originally posted by CapLeaker View Post
                Thank for posting this I need something like this for a cooling fan for a machine at work

                I looked at what Little Fuse has in that type of fuses the lowest amperage fuse is 30 I need a 15 amps ones

                Originally posted by johnboy1313 View Post
                This is in response to what you posted above
                If it were me
                I would use this one and do away with the pcb board and fuse holder
                Last edited by sam_sam_sam; 06-02-2018, 02:43 PM.
                9 PC LCD Monitor
                6 LCD Flat Screen TV
                30 Desk Top Switching Power Supply
                10 Battery Charger Switching Power Supply for Power Tool
                6 18v Lithium Battery Power Boards for Tool Battery Packs
                1 XBox 360 Switching Power Supply and M Board
                25 Servo Drives 220/460 3 Phase
                6 De-soldering Station Switching Power Supply 1 Power Supply
                1 Dell Mother Board
                15 Computer Power Supply
                1 HP Printer Supply & Control Board * lighting finished it *


                These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

                1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
                2 Hem Saw Computer Stack Board

                All of these had CAPs POOF
                All of the mosfet that are taken out by bad caps

                Comment


                  #9
                  Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                  Originally posted by sam_sam_sam View Post
                  Thank for posting this I need something like this for a cooling fan for a machine at work

                  I looked at what Little Fuse has in that type of fuses the lowest amperage fuse is 30 I need a 15 amps ones



                  If it were me
                  I would use this one and do away with the pcb board and fuse holder
                  you're welcome!

                  Comment


                    #10
                    Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                    Thanks for the help guys I'll report back once it's working again

                    Comment


                      #11
                      Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                      You have room on the PCB you can use this one:
                      https://www.homedepot.com/p/Cooper-B...R-40/100170316
                      Just wrap and solder solid wire to each eand.
                      Never stop learning
                      Basic LCD TV and Monitor troubleshooting guides.
                      http://www.badcaps.net/forum/showthr...956#post305956

                      Voltage Regulator (LDO) testing:
                      http://www.badcaps.net/forum/showthr...999#post300999

                      Inverter testing using old CFL:
                      http://www.badcaps.net/forum/showthr...er+testing+cfl

                      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                      http://s807.photobucket.com/user/budm/library/

                      TV Factory reset codes listing:
                      http://www.badcaps.net/forum/showthread.php?t=24809

                      Comment


                        #12
                        Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                        This maybe useful for me as well, I have the same mower, but it haven't fail yet.
                        Why this fuse may have failed in the first place?

                        Comment


                          #13
                          Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                          a good question.

                          Comment


                            #14
                            Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                            He said he was mowing wet, tall grass when it quit working.

                            Comment


                              #15
                              Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                              well if the extra load took out the fuse, it didnt have much headspace!!

                              Comment


                                #16
                                Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                                Originally posted by stj View Post
                                well if the extra load took out the fuse, it didnt have much headspace!!
                                It would seem that way.

                                Comment


                                  #17
                                  Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                                  Originally posted by CapLeaker View Post
                                  https://www.digikey.ca/product-detai...792-ND/2515916
                                  https://www.digikey.ca/product-detai...0801-ND/701068
                                  These are a slow blow.

                                  I'd probably change the fuse holder to accept blade fuses and take a bunch of those fuses of the last link.
                                  Thanks CapLeaker. I went with the first link after the "40A 250V" fuses I ordered on eBay turned out to be 40A 32V fuses. It's working again.

                                  Comment


                                    #18
                                    Re: EGO 56V electric lawnmower, blown 40A 250V fuse

                                    A1! I like seeing things work again!

                                    Comment

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