BD679 TRANSISTOR TO-126

The BD679 is a silicon NPN Darlington transistor housed in a TO-126 package, designed for general-purpose amplifier and switching applications. This transistor is particularly well-suited for applications requiring high current gain and moderate power dissipation. Its robust construction and versatile characteristics make it a popular choice for both hobbyists and professional engineers. The BD679's Darlington configuration consists of two transistors connected in a way that multiplies the current gain. This results in a very high current gain (hFE), typically in the range of 750 to 20,000, allowing the transistor to drive relatively large loads with a small base current. This high gain makes the BD679 ideal for applications where a weak signal needs to be amplified to drive a motor, relay, or other high-current device.

The TO-126 package provides good thermal performance, allowing the BD679 to dissipate moderate amounts of power. The package is designed for easy mounting on a heatsink, which can further improve its power handling capability. The BD679 has a collector-emitter voltage rating of 60V and a continuous collector current rating of 4A, making it suitable for a wide range of applications. The transistor's saturation voltage is relatively low, which minimizes power dissipation and improves efficiency. The BD679 is commonly used in audio amplifiers, where its high gain allows it to amplify weak audio signals to drive speakers. It is also used in motor control circuits, where it can switch the current to a motor on and off.

Other applications include relay drivers, power supplies, and switching regulators. When using the BD679, it is important to consider its base-emitter voltage and current limitations. The base-emitter voltage should not exceed 5V, and the base current should be limited to prevent damage to the transistor. A resistor is typically used in series with the base to limit the base current. The BD679 is a reliable and versatile transistor that can be used in a wide range of applications. Its high current gain, moderate power dissipation, and robust construction make it a popular choice for both hobbyists and professional engineers.

Whether you are building an audio amplifier, a motor control circuit, or a power supply, the BD679 can provide the performance and reliability you need. Enhance your electronic designs with the BD679 transistor. Order yours today and experience its high gain and versatile performance.