1N4148 75V 200mA General Purpose Diode – Datasheet

The 1N4148 Rectifier Diode is a general purpose silicon diode commonly used as a blocking diode or as a rectifier in power supplies that convert AC to DC power. The 1N4148 has a continuous blocking voltage of 75V and can sink up to 200mA of current. The 1N4148 diode has a fast switching speed of 4 ns. The forward voltage drop of the diode is 1.0V.

Features of 1N4148

  • High Reliability
  • Low forward voltage
  • High-speed switching
  • Low reverse leakage current
  • Lead-free finish, RoHS compliant

Pinout of 1N4148

Specification of 1N4148

Package TypeDO-35
Diode Element MaterialSILICON
Reverse Recovery Time4ns
Operating Temperature-Max175.0 Cel
Output Current-Max200 mA
Peak Repeat. Reverse Voltage75 V
Max. Reverse Current (Ir)0.025 mA
Max. RMS Reverse Voltage (Vr)75 V
Max. Forward Voltage Drop (Vf)1.0V
Max Power Dissipation500 mW
Reverse Current5 µA
Average Rectified Current (Io)0.2 A

Uses of 1N4148

The 1N4148 can be used in a variety of electronic applications. It can be used when you need to convert AC power to DC power, it can be used to block power surges to protect electronic components from being burned or damaged, and it can also be used in digital logic circuits. It is also suitable for battery charging circuits, power supply circuits, and voltage doubler circuits.

Advantages of 1N4148

  • Cheap construction
  • Low forward voltage drop
  • Low reverse leakage
  • High forward surge current capability


  • High-speed switching
  • General switching
  • Rectification
  • Components protection
  • Blocking incoming voltage was not required
  • Signal filtering

Equivalent of 1N4148

  • 1N4448, 1N4150, 1N4151, 1N4448WS, 1N914, 1N916A

Leave a Comment