The ON Semiconductor 2SC3661 is a versatile NPN epitaxial silicon transistor designed for use in a wide range of electronic applications. This high-quality bipolar junction transistor (BJT) is well-suited for audio frequency amplifier applications and is recognized for its reliable performance and efficiency.

The 2SC3661 features a collector-emitter voltage (Vceo) of 50V, which allows it to handle moderate power levels while maintaining its structural integrity. Its collector current (Ic) rating of 100mA makes it suitable for signal amplification in audio circuits and other low to medium current applications. Additionally, the device boasts a collector power dissipation (Pc) of 400mW, contributing to its robustness and ability to perform consistently over a wide temperature range.

With a transition frequency (ft) of 120MHz, the 2SC3661 is capable of operating at higher frequencies, which is advantageous for applications requiring fast switching and signal processing capabilities. The high gain bandwidth product ensures that the transistor can amplify signals with minimal distortion, making it an excellent choice for high-fidelity audio applications.

The hFE or DC current gain of the 2SC3661 ranges from 70 to 700, providing a broad amplification factor that can be utilized in various circuit designs. This range of current gain also allows for greater flexibility in matching the transistor to specific circuit requirements, ensuring optimal performance.

ON Semiconductor's commitment to quality is evident in the 2SC3661, which is designed and manufactured to meet the stringent requirements of the electronic components industry. The device is available in a TO-92 package, a widely used and easily mountable package that simplifies the assembly process for electronic equipment manufacturers.

In summary, the 2SC3661 NPN transistor from ON Semiconductor is a reliable and efficient solution for designers looking to enhance their audio amplification circuits and other electronic applications that require a high-performance NPN transistor.