BF494 NPN Medium Frequency Transistor 20V 30mA TO-92 Package

BF494 NPN Medium Frequency Transistor 20V 30mA TO-92 Package

The BF494 is a high-performance NPN silicon transistor designed for medium-frequency (MF) and very high-frequency (VHF) applications. With a collector-emitter voltage of 20V and a collector current of 30mA, it provides excellent gain, low noise performance, and high-frequency response up to 300 MHz.

Encased in a TO-92 plastic package, the BF494 offers low parasitic capacitance and fast switching capability, making it ideal for use in RF amplifiers, oscillators, and mixers for radio, television, and communication equipment. Its stable gain and consistent performance make it a reliable choice for signal amplification and frequency generation circuits in both consumer and industrial electronics.

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Features:

• Transistor Type: NPN Silicon Medium-Frequency Transistor
• Package: TO-92 (compact and reliable design)
• Collector-Emitter Voltage (V_CE): 20V
• Collector Current (I_C): 30mA
• Power Dissipation (P_tot): 250mW (typical)
• Transition Frequency (f_T): Up to 300 MHz
• Low Noise Performance: Ideal for sensitive RF applications
• High Gain & Fast Response: Excellent for high-frequency signal amplification
• Stable Operation: Reliable under varying temperature and voltage conditions
• Compact Package: Easy integration into RF and communication circuits

Applications:

• RF and IF Amplifiers: Used in radio receivers, tuners, and preamplifiers
• Oscillator Circuits: Ideal for frequency generation and signal modulation
• Mixers & Signal Processors: In communication and TV receiver stages
• Antenna Booster Circuits: For radio and VHF signal enhancement
• Switching & Modulation Circuits: Suitable for high-speed signal control
• FM/AM Receiver Circuits: Common in RF and IF amplifier stages
• Educational & Hobby Projects: Great for RF and frequency experimentation

bf494-transistor-datasheet