BF240, BF241 Characteristics at Tamb = 25 °C Symbol Min. Typ. Max. Value hFE hFE 67 36 -220 125 -Base Emitter Voltage at VCB = 1 0 V, lc = 1 mA VBE 650 700 740 mV Collector Cutoff Current at VCB = 20 V ICBO -100 nA Thermal Resistance Junction to Ambient RlhA -420" K/W Collector Base Breakdown Voltage at lc = 1 0 /uA V(BH)CBO 40 -V Collector Emitter Breakdown Voltage at lc = 2 mA V(BR)CEO 40 -V Emitter Base Breakdown Voltage at IE = 1 0 ^A V(BH)EBO 4 -V Gain Bandwidth Product at VCB = 10V, lc = 1 mA, f= 100MHz fj -430 400 -cre -0.27 -PF at VCB = 10V, lc = 1 mA gs = 5 mS, t = 200 kHz ys = (6.6 -j 3.3) mS, f = 1 00 MHz F F -1.5 1.6 3.5 dB dB Output Admittance at VCB = 10 V, lc = 1 mA, f = 10.7 MHz at VCB = 10 V, lc = 1 mA, f = 470 kHz g« g« -10.5 8.3 DC Current Gain at VCE -1 0 V, lc = 1 mA Feedback Capacitance at VCB= 10 V, lc = 1 mA, f = 1 MHz BF240 BF241 BF240 BF241 fr _ MHz MHz Noise Figure (emitter grounded) 11 Valid provided that leads are kept at ambient temperature at a distance of 2 mm from case pS Ms
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