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Power mosfet to switch 140 VDC

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.
 
B

Bob Monsen

Jan 1, 1970
0
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.

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

http://tinyurl.com/95vxn

For operational information, look at the datasheets.
 
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