The 2SA1561 is a PNP Epitaxial Planar Transistor manufactured by Rohm Semiconductor. It's designed for use in audio amplifier applications, particularly in the output stages where high linearity and power handling are required.

Applications

• Audio power amplifiers
• Output stages of audio amplifiers
• Line drivers
• General-purpose amplification
• High-fidelity audio equipment

Features

• PNP Epitaxial Planar Transistor
• High Collector Power Dissipation
• Low Saturation Voltage
• Excellent Linearity
• Complementary to NPN transistor (e.g., 2SC4061)
• Available in TO-126 package

Benefits

• High power output capability suitable for driving speakers.
• Minimal power loss and efficient operation due to its low saturation voltage.
• Accurate and faithful signal amplification because of its excellent linearity.
• Convenient implementation in push-pull amplifier configurations when used with its NPN complement.
• Easy mounting and heatsinking with the TO-126 package.

Additional Details

The 2SA1561 is often paired with an NPN complement, such as the 2SC4061, in push-pull amplifier configurations to deliver high-quality audio amplification. Key specifications include collector-base voltage (VCBO), collector-emitter voltage (VCEO), collector current (IC), and power dissipation (PC). Refer to the Rohm Semiconductor datasheet for detailed electrical characteristics, thermal resistance, and safe operating area information. Proper heatsinking is crucial for reliable operation at high power levels. The transistor's performance is optimized for audio frequencies, providing low distortion and high fidelity sound reproduction.