The 2SA1790J-C is a PNP silicon epitaxial transistor manufactured by Panasonic. It is designed for use in a variety of audio and general-purpose amplifier applications. Its characteristics make it suitable for both low-noise and high-gain amplification stages.

Applications:

• Audio amplifiers (preamplifiers, power amplifiers)
• General-purpose amplification
• Switching circuits
• Driver stages
• Line output stages

Features:

• Low collector-emitter saturation voltage
• High current amplification factor (hFE)
• Excellent linearity
• Low noise figure
• High transition frequency (fT)

Benefits:

• Improved audio quality due to low noise and distortion
• Efficient amplification with low saturation voltage
• Versatile usage in different circuit configurations
• Enhanced signal fidelity
• High reliability and long operational life

Additional Details:

The 2SA1790J-C transistor features a collector-emitter voltage (Vceo) of -50V, a collector current (Ic) of -150mA, and a power dissipation (Pc) of 200mW. It is typically available in a small signal package such as SOT-23 or similar, suitable for compact circuit designs. The device's high hFE ensures that it can provide substantial current gain, while its low saturation voltage minimizes power loss and improves efficiency. Its transition frequency allows it to operate effectively at high frequencies, making it suitable for audio and RF applications. The 'J-C' suffix likely denotes specific gain or packaging characteristics. Always refer to the official Panasonic datasheet for the most accurate and up-to-date specifications.