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IndustryArena Forum > CNC Electronics > Stepper Motors / Drives > MOSFET replacements for DM860H stepper drivers.
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  1. #1
    Join Date
    Dec 2012
    Posts
    192

    MOSFET replacements for DM860H stepper drivers.

    Hello everyone.

    Anyone out there knows what MOSFETS are used in the DM860H stepper drivers? Any suggestion for possible replacements?

    Thanks.

  2. #2
    Join Date
    Jul 2014
    Posts
    13

    Re: MOSFET replacements for DM860H stepper drivers.

    I had an ma860h fail earliert his year and i got it running by replacing all the mosfets with irf640z . i think it might have had irf540s originally but i only had the 640s on hand and it got it working again. I replaced all 8 mosfets to be safe even though only 2 failed

  3. #3
    Join Date
    Dec 2012
    Posts
    192

    Re: MOSFET replacements for DM860H stepper drivers.

    Quote Originally Posted by Zvonkorp View Post
    I had an ma860h fail earliert his year and i got it running by replacing all the mosfets with irf640z . i think it might have had irf540s originally but i only had the 640s on hand and it got it working again. I replaced all 8 mosfets to be safe even though only 2 failed
    I apologize for not replying sooner but I was required to do some fieldwork.

    I thank you for your interest. I finally found the parts and the drive is up and running. Fortunately the damage was restricted to the output transistors.

    I do agree with your suggestion of replacing the whole set, that is the 8 MOSFETS. That´s far better than risking another costly machine timedown.

    Thanks again.

    Regards.

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