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Author Topic: Help Chosing a MOSFET to drive a fan  (Read 421 times)
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I am not very familiar with MOSFETs and would appreciate some suggestions that will enable me to vary the speed of a 12V fan that draws a maximum of 4A.
I have heard I have to use n-channel logic level MOSFETs, would the following two models do the job or are there better options?
1. FP30N06LE https://www.sparkfun.com/products/10213
2. FQP30N06L: http://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CDMQFjAA&url=http%3A%2F%2Fwww.fairchildsemi.com%2Fds%2FFQ%2FFQP30N06L.pdf&ei=PiAYUeajG4HoiQLvgIGICA&usg=AFQjCNFxtfO205b58XoKm3aBLsBewcPNuQ&sig2=r_PbD0hyRgCA9tMhdNFQLg

Thanks
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Those are perfect.

Normal good old power mosfets need about 9V or 10V at the gate to switch it on.
So that's why you need a 'logic' power mosfet. They are designed to operate with logic levels from a microcontroller or a Arduino.

You could also buy any n-channel logic power mosfet from Ebay.
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SparkFun also offers that same mosfet with a small module board with terminal strips for making easy connections.

https://www.sparkfun.com/products/10256?

Lefty
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