2N3819 N-Channel JFET – Low Noise Transistor for RF & Audio Amplification

The 2N3819 is a high-input-impedance N-Channel JFET (Junction Field Effect Transistor) ideal for low-noise signal amplification in audio, RF, and instrumentation circuits. Its versatility and reliability make it a favorite in analog applications.

⚙️ Key Features

• 🔇 Low noise figure – excellent for sensitive signal paths
• 🔋 High input impedance for minimal signal loading
• ⚡ Drain-source voltage up to 25V
• 📦 TO-92 package for easy integration in through-hole designs
• 🌐 Ideal for high-frequency and analog circuits

📦 Typical Applications

• 🎧 Audio preamplifiers
• 📡 RF amplifiers and tuners
• 🧪 Test and measurement instrumentation
• 📐 Low-level signal detection and buffering

With its low noise performance and stable operation, the 2N3819 JFET is a go-to component for analog designers and hobbyists alike.