Small Signal NPN Transistors TO-72 Case TYPE NO. DESCRIPTION VCBO VCEO VEBO ICBO @ VCB (V) (V) (V) µA) (µ MIN MIN MIN MAX hFE @ IC @ VCE (V) (mA) MIN (V) MAX VCE (SAT) @ IC (V) (mA) MAX fT Cob (MHz) *Ccb (pF) MIN MAX 2N917 RF/IF OSCILLATOR 30 15 3.0 0.001 15 20 -- 3.0 1.0 0.5 3.0 500 1.7 2N917A RF/IF OSCILLATOR 30 15 3.0 -- -- 20 200 3.0 10 -- -- 600 1.7 2N918 RF/IF OSCILLATOR 30 15 3.0 0.01 15 20 -- 3.0 1.0 0.4 10 600 1.7 2N998 DARLINGTON 100 60 15 0.01 90 10 5.0 1.8 100 60 30 2N2857 VHF/UHF OSC 30 15 2.5 0.01 15 30 150 3.0 1.0 -- -- 1,000 1.0* 2N2865 RF/IF OSCILLATOR 25 13 3.0 0.01 15 20 200 4.0 10 0.4 10 600 2.5 2N3478 VHF/UHF LOW NOISE 30 15 2.0 0.02 1.0 25 150 2.0 8.0 -- -- 750 1.0* 2N3839 VHF/UHF AMPL/OSC 30 15 2.5 0.01 15 30 150 3.0 1.0 -- -- 1,000 1.0* 2N5179 VHF/UHF AMPL/OSC 20 12 2.5 0.02 15 25 250 3.0 1.0 0.4 10 900 1.0* BFY90 VHF/UHF AMPL/OSC 30 15 2.5 0.01 15 20 125 25 1.0 -- -- 1,000 1.5* 1,600 8,000 Shaded areas indicate Darlington. Dual Transistors TO-71 Case PD @ TA=25oC=360mW Total (Both Die Equal Power) TYPE NO. DESCRIPTION VCBO VCEO VEBO ICBO @ VCB (V) (V) (V) (nA) (V) MIN MIN MIN MAX hFE @ IC @ VCE VCE (SAT) @ IC (mA) (V) (V) (mA) MIN MAX MAX MATCHING hFE VBE % (mV) CEN741 NPN LOW NOISE 45 45 6.0 10 45 150 600 0.01 5.0 0.35 1.0 20 5.0 CEN832 PNP LOW NOISE 60 60 5.0 10 50 150 450 1.0 5.0 0.25 1.0 20 5.0 69 w w w. c e n t r a l s e m i . c o m