Oh yes. You will have your usual protection circuits in your device (TVS, zener, fuse, resistor, varistor, etc). That is the normal thing you need to take note anyway. You need to design according to the standards which apply. The lightening barriers add protection to the voltage differential caused by lightening strike. Actually it will not even protect the connected device from direct lightening strike. Xiaofan -----Original Message----- From: Peter [mailto:plp@actcom.co.il] Sent: Wednesday, June 01, 2005 12:40 AM To: Microcontroller discussion list - Public. Subject: RE: [PIC] Pin Protection On Tue, 31 May 2005, Chen Xiao Fan wrote: > Oh yes. Gas arrestors are one of the best device for lighten > protection. The company I am working for have lots of > Over-voltage suppressor (lightning-protection barrier). > > Take a look at my company's web site. > http://www.pepperl-fuchs.com and search for P-LB and K-LB. > The discharge current is up to 10KA. And the minimum firing voltage is 80V so you need something else after the gas arrestors to stop the damage. Peter -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist