On Tue, May 24, 2011 at 12:20 AM, V G wrote: > On Mon, May 23, 2011 at 10:01 PM, Denny Esterline w= rote: > >> Uhm... still no mounting holes... >> > > It's not finished yet! I'll be sure to put appropriate mounting holes for > M3 hex standoffs. > > > >> I don't know what you're doing with the TO220 parts, but anything that >> needs >> a package that big will likely not be happy with those skinny little >> traces. >> > > Those are specifically BUZ71 N channel MOSFETs. The MOSFETS switch a 12V = AC > relay. It doesn't actually take /that/ much power and the MOSFET won't ev= en > get a little warm because the relay won't that /that/ much power. I just > found that that particular MOSFET was suitable for my needs. > > And BUZ71 is only available in that package: > http://ca.mouser.com/Search/Refine.aspx?Keyword=3Dbuz71 > > Specifically, they're being used to switch this relay: > http://futurlec.com/Relays/PR12VDCSPST.shtml > > - Coil Power: 1200 mW > - Nominal Voltage: 12Vdc > - Coil Resistance: 120ohm > > Could you please suggest an alternative N channel MOSFET suitable for thi= s > use? The gate is being switched at 3.3V. > Anyway, I agree, I don't think a TO220 MOSFET is required. The relay only needs 100mA, so I'm going to switch to a SOT223 package. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .