The 2SC3987 is a silicon NPN transistor manufactured by SANYO. It is generally used for high-frequency power amplification in various electronic devices.

Applications:

• RF Amplifiers: Commonly used in radio frequency amplifiers for boosting signal strength.
• Mobile Communication Devices: Found in cellular phones and other mobile devices for signal amplification in the transmit path.
• Wireless Communication Systems: Used in wireless LAN devices and other wireless communication equipment.
• High-Frequency Oscillators: Suitable for use in oscillator circuits generating signals at high frequencies.

Features:

• High Power Gain: Provides substantial power gain for amplifying signals.
• Low Noise Figure: Ensures minimal noise addition during amplification, preserving signal integrity.
• High Collector Current: Capable of handling significant collector current, allowing for higher power output.
• NPN Silicon Transistor: A standard NPN transistor configuration, widely used and easily integrated into circuits.
• High Transition Frequency: Designed for high-frequency applications with a high transition frequency.

Benefits:

• Enhanced Signal Strength: The high power gain allows for significant signal amplification, leading to improved communication range and clarity.
• Reduced Noise: The low noise figure minimizes the introduction of noise during amplification, resulting in a cleaner and more reliable signal.
• Improved System Performance: The high collector current enables the transistor to handle higher power levels, contributing to improved overall system performance.
• Versatile Use: Suitable for various high-frequency applications, providing design flexibility.

Additional Details:

The 2SC3987 is typically packaged for surface mounting. Important parameters include collector-emitter voltage, collector current, power dissipation, and transition frequency. Designers should refer to the datasheet for precise specifications. It is often used in applications where a compact size and efficient high-frequency power amplification are required.