2N5457 – NATIONAL SEMICONDUCTOR

The National Semiconductor 2N5457 is a high-performance N-Channel Junction Field-Effect Transistor (JFET) designed for low-noise amplifier and switching applications. Its key advantage lies in its low input capacitance and high transconductance, enabling excellent gain and bandwidth characteristics. Typically operated with drain-source voltages up to 25V, the 2N5457 can handle drain currents up to 10mA. Housed in a through-hole TO-92 package, it’s easily implemented in breadboard prototypes and PCB designs. The device is specified for an operating temperature range of –55°C to 150°C, ensuring reliable performance in diverse environments. Common use cases include preamplifiers for audio equipment, high-impedance buffers, and analog switches. Its high input impedance minimizes loading effects on signal sources.