The 2SC4928 is a silicon NPN epitaxial planar transistor manufactured by Hitachi, Ltd. It is primarily designed for high-frequency power amplifier applications, commonly used in VHF and UHF bands. Known for its high power gain and capability to handle significant power dissipation, it is suitable for demanding amplifier circuits.

Applications:

• VHF/UHF Power Amplifiers: Specifically designed for use in power amplifier circuits operating in the VHF (Very High Frequency) and UHF (Ultra High Frequency) bands.
• Radio Transmitters: Employed in radio transmitter output stages to amplify signals before transmission.
• Mobile Communication Devices: Utilized in RF sections of mobile communication devices for power amplification.
• High-Frequency Oscillators: Suitable for incorporation into high-frequency oscillator circuits.

Features:

• High Power Gain: Provides a significant power gain, enhancing signal strength in amplifier applications.
• High Collector Power Dissipation: Capable of handling substantial power dissipation, making it suitable for high-power applications.
• High Transition Frequency: Exhibits a high transition frequency, enabling operation in high-frequency circuits.
• Low Feedback Capacitance: Features low feedback capacitance, which improves stability and performance.

Benefits:

• Enhanced Signal Amplification: Delivers improved signal amplification in high-frequency power amplifiers.
• Increased Power Output: Allows for greater power output, making it ideal for transmitter applications.
• Improved Efficiency: Provides efficient power amplification, reducing power consumption.
• Reliable Operation: Offers stable and reliable operation within specified operating conditions.

Technical Specifications:

The specific technical specifications, such as collector-emitter voltage (VCEO), collector current (IC), and power dissipation (PC), can vary based on the manufacturing batch and should be verified using the manufacturer's datasheet. Typical values for similar transistors in this class may include a VCEO of around 60V, an IC of around 6A, and a PC of around 40W. Consult the official datasheet for precise values.

This transistor is commonly housed in a through-hole package, often a TO-220. Proper heatsinking is essential to manage heat dissipation effectively, particularly when operating at higher power levels. Always refer to the manufacturer's datasheet for optimal usage and application guidelines, encompassing biasing and thermal management recommendations to ensure the component's proper functionality and longevity.