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kn3904 datasheet (pdf) 1.1. kn3904s.pdf size:71k _kec semiconductor kn3904s technical data epitaxial planar npn transistor general purpose application. switching application. e features l b l dim millimeters low leakage current _ + 2.93 0.20 a b 1.30+0.20/-0.15 : icex=50na(max.) ; @vce=30v, veb=3v. IRF530 MOSFET are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for IRF530 MOSFET. It is used in a variety of analog amplification and switching applications. The 2N3904 is used very frequently in hobby electronics projects, including home-made ham radios, code-practice oscillators and as an interfacing device for microcontrollers .