BAS21 DComponents DIODE GP 200V 200MA SOT23-3


The BAS21 is a general-purpose switching diode commonly used in electronic circuits. Here is an overview of the BAS21 diode from DComponents:


BAS21 Diode Overview:

  • Manufacturer: DComponents
  • Part Number: BAS21
  • Type: General-Purpose Switching Diode
  • Package: SOT23-3 (Surface-Mounted Device Package with 3 leads)
  • Voltage Rating: 200V
  • Current Rating: 200mA
  • DataSheet

    BAS21 PDF

Key Features:

  • Switching Diode: Designed for high-speed switching applications.
  • Voltage Rating: Capable of withstanding up to 200V in the reverse direction.
  • Current Rating: Rated for handling up to 200mA of continuous forward current.
  • Package Type: SOT23-3 is a compact surface-mount package ideal for SMD applications.


The BAS21 diode is commonly used in various electronic circuits for tasks such as:

  • Rectification: Converting AC to DC in power supplies.
  • Signal Demodulation: Extracting baseband signal from a modulated carrier.
  • Signal Clipping: Limiting signal amplitude in waveform shaping circuits.
  • Protection Circuits: Overvoltage protection and reverse polarity protection.
  • Voltage Multiplier Circuits: Used in charge pump circuits and voltage doublers.

Working Principle:

  • The BAS21 diode operates similarly to standard diodes, allowing current flow in one direction and providing a barrier against reverse current flow.
  • In switching applications, it facilitates rapid switching transitions due to its high-speed characteristics.

Suggested Projects:

  • Voltage Regulators: Designing voltage regulation circuits.
  • Signal Conditioning: Employing in signal conditioning and amplification circuits.
  • LED Drivers: Driving LEDs in lighting applications.
  • Voltage Clamp Circuits: Protecting sensitive components from overvoltage conditions.
  • Frequency Mixer Circuits: Used in RF signal processing applications.


  • Refer to the datasheet provided by DComponents for detailed specifications, thermal characteristics, and application guidelines specific to the BAS21 switching diode.
  • Ensure that the diode's voltage and current ratings align with the requirements of your circuit for reliable performance.

The BAS21 switching diode from DComponents is a versatile component suitable for various electronic applications, offering high-speed switching capabilities and a voltage rating of 200V, making it a useful choice for tasks requiring rapid signal processing and rectification.