BSS138PW,115: Overview, Features, and Applications

The BSS138PW,115 is an N-channel enhancement mode field-effect transistor (FET) designed for general purpose switching and amplification. Manufactured by Nexperia, this component is typically used across various electronic applications. Here's an overview of its features and typical applications:


  • Type: N-channel Enhancement Mode Field-Effect Transistor (FET)
  • Package: SOT323
  • Manufacturer: Nexperia
  • Polarity: It is a unipolar device, conducting current in one direction through the control of gate-to-source voltage.



  1. Enhancement Mode: The FET operates in the enhancement mode, necessitating a positive voltage on the gate with respect to the source to allow current flow between the drain and source terminals.

  2. Low Threshold Voltage: With a low threshold voltage, it can be readily activated with low gate-to-source voltage, making it ideal for low-power applications.

  3. Small Package: The SOT323 package allows for compact surface-mount assemblies, making it suitable for small form-factor electronic devices.

  4. Low Input and Output Capacitance: These characteristics enable efficient integration into high-frequency applications and help minimize the capacitive loading of driving circuits.

  5. High Speed Switching: The FET features fast switching characteristics, making it suitable for high-speed applications.


  1. Signal Switching: Commonly employed for signal switching in various electronic systems, especially in low-power and portable devices where space and power efficiency are crucial.

  2. Level Shifting: Due to its low threshold voltage, it is suitable for level-shifting applications, aiding in interfacing between different voltage domains.

  3. Load Switching: Used as a switch to control power supply to various sub-circuits, particularly in battery-operated and portable devices, aiding in efficient power management.

  4. Signal Amplification: In low-power and moderate-frequency applications, the BSS138PW,115 can be used for signal amplification, leveraging its FET properties.

  5. Oscillator Circuits: Utilized in oscillator and waveform generation circuits, particularly in low-power or small-scale integrated systems, where efficient power utilization is critical.

  6. Voltage Regulation: It can be employed in voltage regulator circuits, particularly in low-power applications where low threshold voltage and small form factor are advantageous.

The BSS138PW,115 FET is widely used in various digital and analog circuits, especially in portable devices, and applications where space and power efficiency are critical.

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