TECHNICAL DATA In Common-Base Circuit Small-Signal Forward-Current-Transfer-Ratio Cutoff Frequency (with collector-to-base volts = 12 and emitter ma = 1.5) 30 Me Colleetor-to-Base Capacitance (with collector-to-base volts = 12 and emitter eurrent = 0) ln Common-Emitter Circuit Srmall-Signat Forward Current-Transfer Ratio at 1 kilocycle (with collector-to-emitter volts = 12 and emitter ma = 1.5)...... . 60 Input Resistance with ac output circuit shorted: With collector-to-emitter volts = ~12, emitter ma = 1.5, and signal frequency = 12.5 Me... 2... ee eee . 150 ohms With collector-to-emitter volts = 12, emitter ma = 1.5. and signal frequency = 1.5 Me... 2-0... ccc e ce eee 1350 ohms Output Resistance with ac input circuit shorted: ith collector-to-emitter volts = 12, emitter ma = 1.5, and signal frequency = 12.5 Me... 20... ee eee 4000 ohms With collector-to-emitter volts . i = 1.5, and signal frequency = 1.5 Mi 70000 ohms Power Gain: With coliector-to-emitter volts = 12, emitter ma = 1.5, and signal frequency = 12.5 Me... 02.0. ccc te eee 22 db With collector-to-emitter volts = 12, emitter ma = 1.5, and signal frequency = 1.6 Me... . 2 cece ee eee 45 ab TYPICAL OPERATION IN VIDEO-AMPLIFIER CIRCUIT DC Collector-to-Emitter Voltage... 0.0.00 cece eee eee eens -12 volts DC Emitter Current............ . 5.8 ma Source Impedance............... bee 150 ohms Capacitive Load..............0005 o. seceee . 16 pi Frequency Response. . Puise-Rise Time. . . see . Voltage Gain... 6.2.2 eee weeeee seas . 26 Maximum Peak-to-Peak Output Voltage 20 valts 20 eps to 9 Me 0.089 usec db POWER TRANSISTOR Germanium p-n-p type used in a wide variety of switching and ampli- pe fier applications in industrial and mili- 2 N27 7 tary equipment requiring transistors having high voltage, current, and dis- sipation values. It is used in power- switching, voltage- and current-regulating, de-to-de converter, inverter, power- supply and relay- and solenoid-actuating circuits; and in low-frequency oscillator and audio-amplifier service. This type is designed to provide satisfactory per- formance under extreme environmental conditions of temperature, moisture, and altitude; it is stud-mounted to provide positive heat-sink contact, and has a cold- weld seal to insure reliable performance under severe environmental conditions. JEDEC No. TO-36 package; outline 14, Outlines Section. This type is identical with type 2N173 except for the following items: MAXIMUM RATINGS COLLECTOR-TO-BASE VOLTAGE (with cmitter-to-base volts = 1.5)...... --40 max volts EMITTER-TO-BASE VOLTAGE (with collector open)... 0.0... . eee ee eee eeee --20 max volts CHARACTERISTICS Collector-to-Emitter Breakdown Voltage: . With base short-circuited to emitter and collector amperes = 0.3.... --40 min wolts With base open and collector amperes = 0.3..........000 0000-0 e ee 40 volts With base open and collector amperes = 1.......--..-+--6- 25 min volts Emitter-to-Base Voltage (with colleetor-to-base volts and emitter current = 0)........-..-0+00+ 1 masz volt Collector-to-Emitter Reach-Through Voltage..... --40 min volts Eimitter-Cutoff Current (with ernitter-to-base volts and collector current = 0). 2.0.0.0... 0. eee ete eee eee 1 ma Colleetor-Cutoff Current (with colleetor-to-base volts = 40 and emitter current = 0). 0.0.00 cece ee een teen ene n eens -2 ma 137