BAV99LT1G: Overview, Features, and Applications


The BAV99LT1G is a high-speed, low leakage, and low forward voltage drop dual common cathode switching diode in a SOT-23 surface mount package. It contains two diodes which are used for various applications including switching, and rectification. Here’s an overview of its features and common applications:


  • Type: Dual Common Cathode Switching Diode
  • Package: SOT-23
  • Manufacturer: ON Semiconductor / Diodes Inc.


  1. Dual Diodes in a Single Package: The BAV99LT1G features two diodes in one package, offering more compact and space-saving circuit design.

  2. Low Forward Voltage Drop: It has a relatively low forward voltage drop, making it efficient for rectification and signal switching applications.

  3. Fast Switching Speed: This diode is known for its high-speed switching capabilities, rendering it suitable for high-frequency applications.

  4. Low Leakage Current: It has a low reverse current, which is beneficial for applications where low leakage is required.

  5. Surface Mount Package: The SOT-23 package allows for easy integration onto printed circuit boards, making it well-suited for modern electronics manufacturing.


  1. Signal Demodulation: In demodulation circuits where it is utilized to extract modulation from a carrier wave, such as in radio frequency circuits.

  2. Signal Clipping and Protection: Commonly used in clipping or protection circuits, especially in applications where protection against voltage spikes or reverse voltage is needed.

  3. Logic Gates and Circuits: Due to its dual diode nature, the BAV99LT1G can find applications in simple logic gates and circuitry for creating OR and AND logic functions.

  4. Voltage Multipliers: Often found in voltage doubler and multiplier circuits, used to generate higher DC voltages from AC sources.

  5. Switching Applications: Its fast switching characteristics make it useful for switching and general-purpose rectification in a variety of applications.

  6. Oscillator Circuits: Its fast switching speed makes it suitable for use in oscillator circuits, especially in high-frequency or high-speed applications.

  7. Power Management: When used in rectification circuits, the BAV99LT1G assists in converting alternating current (AC) to direct current (DC) in power supplies and various low-power devices.

The BAV99LT1G diode, boasting both fast switching speed and low forward voltage drop, is a versatile component commonly used in a variety of electronics applications including signal processing, rectification, and protection.