2n2857 2N3839 npn silicon rf transistors description: the central semiconductor 2n2857 and 2N3839 are silicon npn rf transistors designed for vhf/uhf amplifier, oscillator and converter applications. marking: full part number to-72 case maximum ratings: (t a =25c unless otherwise noted) symbol units collector-base voltage v cbo 30 v collector-emitter voltage v ceo 15 v emitter-base voltage v ebo 2.5 v continuous collector current i c 40 ma power dissipation p d 200 mw power dissipation (t c =25c) p d 300 mw operating and storage junction temperature t j , t stg -65 to +200 c electrical characteristics: (t a =25c unless otherwise noted) 2n2857 2N3839 symbol test conditions min max min max units i cbo v cb =15v - 10 - 10 na i cbo v cb =15v, t a =150c - 1.0 - 1.0 a bv cbo i c =1.0a 30 - 30 - v bv ceo i c =3.0ma 15 - 15 - v bv ebo i e =10a 2.5 - 2.5 - v h fe v ce =1.0v, i c =3.0ma 30 150 30 150 f t v ce =6.0v, i c =5.0ma, f=100mhz 1.0 1.9 1.0 2.0 ghz c ob v cb =10v, i e =0, f=100khz to 1.0mhz - 1.0 - 1.0 pf p o v cb =10v, i c =12ma, f=500mhz 30 - 30 - mw g pe v ce =6.0v, i c =1.5ma, f=450mhz, r s =50 12.5 19 12.5 19 db nf v ce =6.0v, i c =1.5ma, f=450mhz, r s =50 - 4.5 - 3.9 db r b c c v cb =6.0v, i c =2.0ma, f=31.9mhz 4.0 15 1.0 15 ps r1 (31-january 2013) www.centralsemi.com
2n2857 2N3839 npn silicon rf transistors lead code: 1) emitter 2) base 3) collector 4) case marking: full part number to-72 case - mechanical outline www.centralsemi.com r1 (31-january 2013)
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