The 2SA1287 is a PNP silicon epitaxial transistor manufactured by ISAHAYA Electronics Corporation. It is designed for use in audio amplifier and switching applications. This transistor is known for its high current gain and low saturation voltage, making it suitable for driving loudspeakers and other high-current loads.

Applications

• Audio Amplifiers (Output Stage)
• Switching Circuits
• Power Amplifiers
• Line Drivers
• DC-DC Converters

Features

• PNP Silicon Epitaxial Transistor
• High Current Gain (hFE)
• Low Saturation Voltage (VCE(sat))
• High Collector Current (IC)
• Complementary to NPN Transistors (e.g., 2SC3247)

Benefits

• High-Quality Audio Reproduction
• Efficient Switching Performance
• Ability to Drive High-Current Loads
• Versatile Usage in Various Electronic Circuits

Additional Details

The 2SA1287 is commonly used in the output stage of audio amplifiers to deliver power to the loudspeakers. Its high current gain ensures that it can amplify the audio signal without significant distortion. The low saturation voltage minimizes power loss, improving the amplifier's efficiency. The datasheet provides critical parameters, including the collector-emitter voltage (VCEO), collector current (IC), power dissipation (PC), and current gain (hFE). These parameters should be carefully considered when designing circuits using the 2SA1287. It's often used in conjunction with its NPN complement, such as the 2SC3247, in push-pull amplifier configurations. The package type is usually a TO-126 or similar for effective heat dissipation.