C1815 (2SC1815) NPN Transistor TO-92

The C1815 (2SC1815) is a reliable, general‑purpose NPN bipolar junction transistor (BJT) in a compact TO‑92 package. Designed for small‑signal audio amplification, high‑frequency stages, and switching tasks, it offers dependable performance for both electronics engineers and hobbyists building circuits with other microcontroller platforms.

✅ Key Features

• High-voltage handling for small-signal stages, suitable for a wide range of electronics components and modules.
• Excellent frequency response with stable gain, ideal for AF and high-frequency signal paths.
• Low-noise performance for clean audio pre-amplification and sensitive detector stages.
• Robust construction and proven reliability for long service life.
• Compact TO‑92 package 🧩 for easy breadboarding and through‑hole assembly.

🧠 Technical Details

• Product Category: Bipolar Junction Transistor (BJT)
• Polarity/Type: NPN, small‑signal, general‑purpose
• Model: C1815 (also known as 2SC1815)
• Package: TO‑92, through‑hole
• Voltage capability: Suitable for moderate/high small‑signal voltage applications
• Frequency traits: High gain‑bandwidth with stable, low‑noise operation

🚀 Typical Applications

The C1815 Transistor TO‑92 is versatile and fits a broad range of circuits, including:

• Audio frequency amplification (preamps, tone stages, small‑signal gain blocks)
• Color TV vertical deflection driver/signal stages
• Switching and general‑purpose amplification in control and sensor interfaces
• Microcontroller I/O buffering for Arduino, Raspberry Pi, and other microcontroller boards
• Signal conditioning in RF/IF and oscillator driver stages

🔌 Integration Tips for Arduino/Raspberry Pi

• Use a base resistor to limit current (value depends on desired collector current and gain).
• Observe polarity and orientation of the TO‑92 package during assembly.
• Keep leads short in high‑frequency stages to minimize stray capacitance.

📄 Datasheet

For detailed electrical characteristics, absolute maximum ratings, and typical curves, refer to the official C1815 / 2SC1815  datasheet from the manufacturer.