This site may help you http://www.kpsec.freeuk.com/components/tran.htm To try and answer your question. The Vce voltage of 0.2 volts is the result of a low resistance path from the collector to emitter. This how the transistor is designed in order to pass maximum current. Were the Vbe voltage is the forward voltage drop across the base to emitter junction that acts just like a voltage drop across a diode. _______________________________________ Roy Tauranga New Zealand _______________________________________ > > what is the saturation voltage for Vce and Vbe. It > looks like the saturation for Vce is 0.2V?? While Vbe > is 0.85V. I am confused on this part(saturation). > -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.14/131 - Release Date: 12/10/2005 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist