Do FET's have any resistance? and if so is it listed on data sheets?

Question

both JFET's and MOSFET's

I have a small circuit to design and it needs to have an equvalant resistance. but it also needs a FET, and idk if FET's have resistance

Answer 1

Yes FETs have resistance & the parameter is Rds = Resistance between the Drain and the Source pins of the FET.

http://www.fairchildsemi.com/ds/BS/BSS13...

If you look at this datasheet you will see various Rds values depending on the Gate voltage.

I hope this helps

Answer 2

yes, and yes.

Resistance is dependent on operating point.

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