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Power mosfet to switch 140 VDC

Discussion in 'Electronic Basics' started by [email protected], Jun 16, 2005.

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  1. Guest

    I need help in using a power mosfet to switch on and off 140 VDC. The
    current is approximately 25 amps. The power will be on for one second
    at a time, then off for twenty seconds. I have an old part number IRF
    243, but it is no longer available. A mosfet in that class, 16 amp 150
    volt 125 watt or higher would work. I need to know how to operate this
    mosfet including how many volts to turn it on and the placement of any
    resistors or other components to make it operate as a relay.
  2. Bob Monsen

    Bob Monsen Guest

    Here is a fairchild search of N-MOSFETS that will possibly work:

    For operational information, look at the datasheets.
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