Look at this one http://www.st.com/stonline/books/ascii/docs/11028.htmk . I have used this one(STP140NF55) and it has .008 ohms and will take 80 amps. They are in a 220 package. I buy them from Mouser at less than $2.00. Derward Myrick ----- Original Message ----- From: "Alan B. Pearce" To: "Microcontroller discussion list - Public." Sent: Thursday, March 29, 2007 6:41 AM Subject: Re: [EE] FET switch voltage drop > >2n7000@5v,50ma is 1.7Ohm Typical. > > The zetex ones I posted the link to have 0.075 ohm at 1.8V drive, 0.055 > ohm > at 2.5V drive and over 4A capable. Others at the top of the table give > 0.04 > ohm at 2.5V drive, and 0.02 ohm at 4.5V drive and 10A capable. All are 20V > BVdss. > >>57ma through 1.7ohms produces a voltage drop of 0.0969V. > > 0.075 ohm gives 4.2mV > 0.055 ohm gives 3.1mV > 0.040 ohm gives 2.28mV > 0.020 ohm gives 1.14mV > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist