1N4937 600V 1A Fast Recovery Diode – Datasheet

The 1N4937 diode is a fast recovery diode with low forward voltage drop and high surge current capability. The 1N4937 rectifier is rated for 1A continuous current and up to 30A peak surge current. The reverse voltage is 600V and the maximum reverse recovery time is 200ns. The 1N4937 is ideal for use in DC power supplies, inverters, and switched voltage converter circuits.

Features of 1N4937

  • Low forward voltage drop
  • High current capability
  • High reliability
  • High surge current capability
  • High efficiency
  • Diffused junction

Pinout of 1N4937

Specification of 1N4937

Package TypeDO-41
Diode Element MaterialFast Recovery
Output Current-Max1.0 A
Peak Repeat. Reverse Voltage600 V
Max. Reverse Current (Ir)0.005 mA
Max. Forward Voltage Drop (Vf)1.1 V
Average Rectified Current (Io)1.0 A
Peak RMS Reverse Voltage420 V
Max. Reverse Recovery time200 ns


  • Switching mode power supply (SMPS)
  • DC power supplies
  • Inverters
  • Adapters
  • TV
  • Monitor

Equivalent of 1N4937

  • 1N4933, 1N4934, 1N4935, and 1N4936

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