2N2857 2N3839 www.centralsemi.com DESCRIPTION: NPN SILICON RF TRANSISTORS 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 =25C unless otherwise noted) A SYMBOL UNITS Collector-Base Voltage V 30 V CBO Collector-Emitter Voltage V 15 V CEO Emitter-Base Voltage V 2.5 V EBO Continuous Collector Current I 40 mA C Power Dissipation P 200 mW D Power Dissipation (T=25C) P 300 mW C D Operating and Storage Junction Temperature T , T -65 to +200 C J stg ELECTRICAL CHARACTERISTICS: (T =25C unless otherwise noted) A 2N2857 2N3839 SYMBOL TEST CONDITIONS MIN MAX MIN MAX UNITS I V=15V - 10 - 10 nA CBO CB I V =15V, T=150C - 1.0 - 1.0 A CBO CB A BV I=1.0A 30 - 30 - V CBO C BV I=3.0mA 15 - 15 - V CEO C BV I=10A 2.5 - 2.5 - V EBO E h V =1.0V, I=3.0mA 30 150 30 150 FE CE C f V =6.0V, I=5.0mA, f=100MHz 1.0 1.9 1.0 2.0 GHz T CE C C V =10V, I =0, f=100kHz to 1.0MHz - 1.0 - 1.0 pF ob CB E P V =10V, I=12mA, f=500MHz 30 - 30 - mW o CB C G V =6.0V, I =1.5mA, f=450MHz, R=50 12.5 19 12.5 19 dB pe CE C S NF V =6.0V, I =1.5mA, f=450MHz, R=50 - 4.5 - 3.9 dB CE C S r C V =6.0V, I=2.0mA, f=31.9MHz 4.0 15 1.0 15 ps b c CB C R1 (31-January 2013)2N2857 2N3839 NPN SILICON RF TRANSISTORS TO-72 CASE - MECHANICAL OUTLINE LEAD CODE: 1) Emitter 2) Base 3) Collector 4) Case MARKING: FULL PART NUMBER R1 (31-January 2013) www.centralsemi.com