Quoting "Alan B. Pearce" : >> Of course for most general purpose low frequency switching applications, >> the newer types are wonderful, especially as you get up in current into >> the hundreds of mA or A. > > Your saying that, this lunchtime I was perusing the latest issue of > Electronics Weekly, where there is a press release from STMicroelectronics > for the STV250N55F3 Mosfet. > > 250A, 1.5mohm PowerSO-10 package rated for 300W @ 25C. > > Suggested uses high current electric traction applications such as fork lift > trucks, wheelchairs and electric bikes ... > > Impressive looking package in the pictures. > > Press release at > http://www.st.com/stonline/stappl/cms/press/news/year2008/p2308.htm > > Data at > http://www.st.com/stonline/stappl/productcatalog/app?path=/comp/stcom/PcStComRPNTableView.onClickOfRPNLink&code=185326 > (link from press release) > > Hmm $2.50 ea @ 10k quantity. Tempted to get some samples, just to have the > chunky package kicking around ... 27A each for those tiny little leads? Not for long I suspect. The 75A test rating is a bit more realistic at least for a short time (8A/lead). 250A and 2.2m ohms is 138W! It also needs a pretty beefy gate driver (multiple A) to get it to switch fast (100nC). Still, quite an incredible device-- and nice high Vds (55V). 50 years ago you could have been burned as a witch for having technology like that! Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" s...@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist