Germanium Milliwatt Transistors 2N398 , 2n398 A Voce = 105 V hee = 20 (min) 2N398 USN/JAN fa, - to 1.0 MHz (typ) PNP germanium transistor for high-voltage, audio- CASE 31 frequency applications. (TO-5) All leads isolated MAXIMUM RATINGS Rating Symbol 2N398A 2N358 Unit Collector-Base Voltage Von 105 105 Vde Collector-Emitter Voltage Voro 105 105 Vac Emitter -Base Voltage Veep 50 50 Vde DC Collector Current In 200 100 mA Emitter Current I, 200 100 mA Junction Temperature Ty -65 to +100 ~65 to +85 c Storage Temperature Tete ~65 to +100 ~65 to +85 C Collector Dissipation @ 25C Py 150 50 mW Thermal Resistance, Junction to Air yA max 0.5 1.2 C/mWw ELECTRICAL CHARACTERISTICS (Tc = 25C unless otherwise noted) Characteristics Symbol Min | Typical Max = | Unit Collector-Base Cutoff Current lepo - 12.0 50 uA (Wop = 105 V, I, = 0) Collector-Base Cutoff Current I - 5.0 14 LA Wa, =2.5V, L,=0) CBO cp=2-5V, i, Emitter -Base Cutoff Current lop oO - 3.0 50 BA Ven = 50V, In = 0) Collector-Emitter Saturation Voltage v - 0.11 0, 35 Vde Qo = 5 mAdc; I, = 0,25 mAdc) CE (AT) Base-Emitter Saturation Voltage Vv - 0. 22 0. 40 Vde Gy = 5 mAdc; IL = 0.25 mAdc) BE (GAT) DC Current Transfor Ratio hep 20 65 - - Qo =5 mAdc; Vor = 0.35 Vdc) DC Collector-Emitter Punch-Through Voltage v PT 105 160 - Vade Vopg necessary to obtain Ven of -1 V max, using instrument with Zin > 11 megohm to measure Vp Ep Small-Signal Short-Circuit, Forward Current f b - 1.0 - MHz Transfer Ratio Cutoff Frequency Vop = 6 Vdc; ly = 1 mAdc) 6-12