NTE477 Silicon NPN Transistor RF Power Output Description: The NTE477 is a silicon NPN epitaxial planar type transistor designed for RF power amplifiers in VHF band mobile radio applications. Features: D High power gain: Gpe ≥ 8.2dB @ VCC = 13.5V; VO = 40W; t = 175MHz D Emitter ballasted construction and gold metallization for high reliability, and good performances D Low thermal resistance ceramic package with flange D Ability of withstanding more than 20:1 load VSWR when operated at VCC = 15.2V, PO = 40W, f = 175MHz, TC = 25°C Applications: 30 to 35 watts output power amplifiers in VHF band mobile radio applications. Absolute Maximum Ratings: (TC = +25°C unless otherwise specified) Collector–Base Voltage, VCBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V Emitter–Base Voltage, VEBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4V Collector–Emitter Voltage (RBE = ∞), VCEO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17V Collector Current, IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10A Collector Dissipation, PC TA = +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5W TC = +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75W Junction Temperature, Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +175°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +175°C Thermal Resistance, Junction–to–Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33.3°C/W Thermal Resistance, Junction–to–Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2°C/W Electrical Characteristics: (TC = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Emitter–Base Breakdown Voltage V(BR)EBO IE = 10mA, IO = 0 3 – – V Collector–Base Breakdown Voltage V(BR)CBO IO = 10mA, IE = 0 35 – – V Collector–Emitter Breakdown Voltage V(BR)CEO IO = 0.1A, RBE = ∞ 17 – – V Electrical Characteristics (Cont’d): (TC = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Collector Cutoff Current ICBO VOB = 15V, IE = 0 – – 2.5 mA Emitter Cutoff Current IEBO VEB = 3V, IO = 0 – – 2 mA DC Forward Current Gain hFE VCE = 10V, IC = 0.2A 10 60 180 – Output Power PO VCC = 13.5V Pin = 6W, f = 175MHz 40 45 – W 60 70 – % .205 (5.18) .215 (5.48) .122 (3.1) Dia E B .405 (10.3) Min C E .155 (3.94) .500 (12.7) Dia .005 (0.15) .270 (6.85) .160 (4.06) .725 (18.43) .975 (24.78)