1N4148WT-7: Overview, Features, and Applications


The 1N4148WT-7 is a small signal switching diode which is widely used in various electronic applications. Here's an overview of its features and typical applications:


Type: Small Signal Switching Diode
Package: SOD-323 (also known as SC-70) Surface Mount Package
Manufacturer: ON Semiconductor
Polarity: This diode is a general-purpose switching diode offering high switching speed and low leakage current.



  1. Fast Switching Speed: The 1N4148WT-7 diode is known for its rapid switch response, making it suitable for high-frequency applications.

  2. High Reverse Voltage Capability: With a maximum reverse voltage rating of 100V, it offers reliable reverse voltage protection.

  3. Low Forward Voltage Drop: This characteristic ensures that when forward-biased, it exhibits minimal voltage drop, enabling efficient signal processing and rectification.

  4. Surface Mount Package: Housed in the SOD-323 package, the diode is designed for convenient surface mount assembly onto printed circuit boards, making it suitable for modern electronics manufacturing processes.

  5. High-Speed Switching: The diode's ability to switch rapidly enables it to efficiently manage high-speed signals.


  1. Signal Demodulation: The 1N4148WT-7 diode is widely used in demodulation circuits to extract modulation from a carrier wave in systems such as radios.

  2. Signal Clipping and Protection: It is employed for clipping and protection applications in circuits where precise voltage levels need to be maintained or protection against voltage spikes or reverse voltage is necessary.

  3. Logic Circuits: Due to its characteristics, it is utilized within logic gates, especially for creating OR and AND logic functions.

  4. Voltage Multipliers: These diodes are commonly used in voltage doubler and multiplier circuits for generating a higher DC voltage from an AC source.

  5. Switching Circuits: They are extensively used in switching applications where their fast switching characteristics are leveraged for efficient control of current flow.

  6. Rectification: The diode is used for rectifying AC signals into DC signals in various electronics applications such as power supplies, battery chargers, and more.

The 1N4148WT-7 diode is an essential component in numerous electronic systems due to its high versatility, making it suitable for a broad range of applications including consumer electronics, telecommunications, automotive systems, and industrial equipment.