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BF494

Part Number	BF494
Manufacturer	Fairchild Semiconductor
Description	NPN RF Transistor
Published	May 3, 2007
Detailed Description	BF494 NPN RF Transistor July 2006 BF494 NPN RF Transistor tm TO-92 1. Collector 2. Emitter 3. Base Ta = 25°C unless ...
Datasheet	BF494 PDF File

Overview

BF494 NPN RF Transistor July 2006 BF494 NPN RF Transistor tm TO-92 1.
Collector 2.
Emitter 3.
Base Ta = 25°C unless otherwise noted Absolute Maximum Ratings * Symbol VCEO VCBO VEBO IC TJ TSTG Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current - Continuous Junction Temperature Storage Temperature Range Parameter Value 20 30 5.
0 30 150 - 55 ~ 150 Unit V V V mA °C °C * These ratings are limiting values above which the serviceability of any semiconductor device may be impaired.
NOTES: 1) These ratings are based on a maximum junction temperature of 150 degrees C.
2) These are steady state limits.
The factory should be consulted on applications involving pulsed or low duty cycle operations www.
DataSheet4U.
com Thermal Characteristics Symbol PD RθJC RθJA Parameter Total Device Dissipation, by RθJA Derate above 25°C Thermal Resistance, Junction to case Thermal Resistance, Junction to Ambient TC = 25°C unless otherwise noted Value 350 2.
8 125 357 Unit mW mW/°C °C/W °C/W Electrical Characteristics* Symbol V(BR)CEO V(BR)CBO V(BR)EBO ICES hFE VCE(sat) VBE(sat) VBE(ON) Parameter Collector-Emitter Breakdown Voltage Collector-Base BreakdownVoltage Emitter-Base Breakdown Voltage Collector-Emitter Sustaining Current DC Current Gain Collector-Emitter Saturation Voltage Base-Emitter Saturation Voltage Base-Emitter On Voltage Conditions IC = 1.
0mA, IB = 0 IC = 10µA, IE = 0 IE = 10µA, IC = 0 VCE = 40V, VEB = 0V VCE = 10V, IC = 1mA IC = 10mA, IB = 5mA IC = 10mA, IB = 5mA VCE = 10V, IC = 10mA Min.
20 30 5.
0 Max.
Units V V V 10 67 222 0.
2 0.
92 650 740 nA V V mV * DC Item are tested by Pulse Test: Pulse Width≤300us, Duty Cycle≤2% ©2006 Fairchild Semiconductor Corporation 1 www.
fairchildsemi.
com BF494 Rev.
A BF494 NPN RF Transistor Package Dimensions TO-92 4.
58 –0.
15 +0.
25 0.
46 14.
47 ±0.
40 ±0.
10 4.
58 ±0.
20 1.
27TYP [1.
27 ±0.
20] 3.
60 ±0.
20 1.
27TYP [1.
27 ±0.
20] 0.
38 –0.
05 +0.
10 3.
86MAX 1.
02 ±0.
10 0.
38 –0.
05 +0.
10 (R2...

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