Product Description

1N4148W is a high-performance small-signal fast-switching diode in a compact DO-35 glass package. It is widely used in signal processing, rectification, protection and switching applications in electronic circuits due to its ultra-fast reverse recovery time of 4ns, low forward voltage drop and high reliability.

Main Technical Parameters

  • Maximum reverse voltage (VR): 100V
  • Average rectified current (IO): 200mA
  • Peak forward surge current (IFSM): 1A
  • Forward voltage drop (VF): 1V@10mA
  • Reverse recovery time (trr): 4ns
  • Junction temperature range (TJ): -65°C to +200°C

Features and Advantages

  • Fast reverse recovery time
  • High reverse voltage
  • Stable forward conduction capability
  • Low forward voltage drop
  • DO-35 small glass package
  • High reliability and consistency

Working Principle

  • Forward bias (on state)
    When the anode voltage is higher than the cathode: the PN junction is turned on and the current flows from the anode to the cathode. The switch is closed, which is equivalent to a low resistance path (the on resistance is usually very small, less than a few ohms).
  • Reverse bias (off state)
    When the cathode voltage is higher than the anode: the PN junction is in the off state and almost no current flows (only a very small leakage current).
    Equivalent to an open circuit.

Typical Applications

  • High-speed switching circuits (logic gates, digital IC drivers)
  • Small signal rectification (detection, peak detection)
  • Voltage clamping and transient protection (TVS replacement)
  • Signal modulation and demodulation (RF applications)

Product Line

For datasheet and more details of 1N4148, please visit the website:

https://en.semiware.com/switching-diode/1n4148

About Semiware
Semiware has a comprehensive product lineup of circuit protection device products. The company leverages its technology in the semiconductor field and application background in end products to serve customers in the electronics, automotive and industrial markets. For more information, please visit semiware official website: https://en.semiware.com/

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