1N4001 50V 1A General Purpose Diode – Datasheet

The 1N4001 Rectifier Diode is a general-purpose silicon diode commonly used as a blocking diode or as a rectifier in power supplies converting AC power to DC power. The 1N4001 has a continuous blocking voltage of 50V and can carry up to 1A of current. The forward voltage drop of the diode is 1.1V.

1N4001 diode has a maximum current rating of 1A and can withstand peaks up to 30A. Therefore, it can be used in circuits rated less than 1A. The reverse current is 5uA and can be ignored. It can withstand reverse voltage spikes up to 50V.

Features of 1N4001

  • High Reliability
  • Diffusion crossing
  • High current capability
  • Low forward voltage
  • Drop surge protection up to 30A peak
  • Low reverse leakage current
  • Lead-free finish, RoHS compliant

Pinout of 1N4001

Specification of 1N4001

Package TypeDO-41
Diode Element MaterialSILICON
Peak Surge Current (8.3mS)30.0 A
Operating Temperature-Max175.0 Cel
Output Current-Max1.0 A
Peak Repeat. Reverse Voltage50 V
Max. Reverse Current (Ir)0.01 mA
Max. RMS Reverse Voltage (Vr)35 V
Max. Forward Voltage Drop (Vf)1.1V
Max Power Dissipation3 W
Reverse Current5 µA

Uses of 1N4001

1N4001 diode can be used in many general-purpose applications. It can be used to build a bridge rectifier, an integral part of DC power supplies that convert AC to DC. It can also be used for clipper applications, reverse current blocking in various component protection circuits, logic gates, etc.

Advantages of 1N4001

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


  • Power supply for electronic equipment
  • Battery charging circuit
  • Adapter
  • Rectifier circuit
  • Switching device
  • Purpose of short-circuit protection

Alternatives of 1N4001

  • 1N4002, 1N4003, 1N4004, 1N4005, 1N4006, and 1N4007

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