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What's with Kapton tape on vents?

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    What's with Kapton tape on vents?

    Keysight puts Kapton tape over their larger electrolytic capacitor's vents.
    To me, this looks mildly useless. Venting will still spray and make a mess, these are Nichicon VM's FFS, not CapXon.
    Any ideas what this is about?
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    #2
    Re: What's with Kapton tape on vents?

    probably to insulate the can from peoples fingers - thats a psu area.

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      #3
      Re: What's with Kapton tape on vents?

      HV electro's have the plastic cover in SMPS. Here there's no SMPS it's using a power transformer, the cans are low voltage 12-20VDC kind of rail at the filter caps.
      Sometimes in production, one person has something happen i.e cap can shorts to workbench or spark or something and then an entire procedure is written up to "put Kapton tape on the can" until the end of time.
      I thought (radial lead) cans aren't connected to anything or maybe it's to the (-).

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        #4
        Re: What's with Kapton tape on vents?

        Maybe to allow an automated pick and place machine to reliably pick the part? The vent lines may reduce the effectiveness of the vacuume pick of the placement head.

        Jeff.

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