2SC945 (C945), NPN General-Purpose Transistor, TO-92

The 2SC945 (commonly marked as C945) is a silicon NPN transistor designed for general-purpose amplification and switching. Due to its high gain and low noise, it’s particularly suitable for small-signal audio applications. It comes in the compact TO-92 through-hole package, making it ideal for analog circuit designs, consumer electronics, and educational projects.

Key Features:

• General-Purpose Switching and Amplification: Commonly used in low-noise audio frequency and signal processing applications.
• High Voltage Tolerance: Handles collector-emitter voltages up to 50V.
• Moderate Current Capacity: Suitable for low to medium current loads up to 150mA.
• High DC Current Gain (hFE): Up to 700, allowing signal amplification with low base drive.
• Low Noise Figure: Optimized for low distortion and minimal noise in audio applications.
• Compact TO-92 Package: Widely used through-hole format for prototyping and low-power applications.

Additional Specifications:

• Type: NPN
• Max Voltage: 50V
• Max Current: 150Ma