1N4001 and 1N5400 series diodes

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a 1N4001 diode

The 1N4001 series (or 1N4000 series[1]) is a family of popular 1.0 A general purpose silicon rectifier diodes commonly used in AC adapters for common household appliances. Blocking voltage varies from 50 to 1000 volts. This diode is made in an axial-lead DO-41 plastic package.[2]

The 1N5400 series is a similarly popular series for higher current applications, up to 3 A. These diodes come in the larger DO-201 axial package.[3]

These are fairly low-speed rectifier diodes, being inefficient for square waves of more than 15 kHz.[4] The series was second sourced by many manufacturers. The 1N4000 series were in the Motorola Silicon Rectifier Handbook in 1966, as replacements for 1N2609 through 1N2617.[5] The 1N5400 series were announced in Electrical Design News in 1968, along with the now lesser known 1.5 A 1N5391 series.[6]

These devices are widely used and recommended.[7][8][9]

The table below shows the maximum repetitive reverse blocking voltages of each of the members of the 1N4000 and 1N5400 series.

Diode part numbers for different currents and voltages[10][11][12]
Voltage 1 A part 3 A part
50 V 1N4001 1N5400
100 V 1N4002 1N5401
200 V 1N4003 1N5402
300 V 1N5403
400 V 1N4004 1N5404
500 V 1N5405
600 V 1N4005 1N5406
800 V 1N4006 1N5407
1000 V 1N4007 1N5408

In the version of these components manufactured for Fairchild Semiconductor by Suzhou, the silicon chip that rectifies the current weighs just 93 micrograms.[13][14][15][16]

Nonstandard uses

Many of the diodes in this family exhibit a change in capacitance with reverse bias and can thus be used by experimenters as makeshift varicap diodes.


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  1. Though some writers and datasheets refer to "1N4000 series", a 1N4000 is a 10-watt Zener diode unrelated to the 1N4001 series of 1 amp rectifiers.
  2. Diodes: 1N4001 - 1N4007 datasheet
  3. "Axial Discretes" (PDF). Diotec Semiconductor AG. 
  4. Wireless World, 88: 75, 1982  Missing or empty |title= (help)
  5. Motorola Silicon Rectifier Handbook 1966.
  6. Electrical Design News, Volume 13, 1968
  7. Gordon McComb (2001). The robot builder's bonanza (2nd ed.). McGraw-Hill Professional. p. 41. ISBN 978-0-07-136296-2. Common diodes are the 1N914, for light-duty signal-switching applications, and the 1N4000 series (1N4001, 1N4002, 1N4003, and 1N4004). 
  8. Home power, Issues 21-32. Electron Connection, Ltd. 1991. p. 173. A good generic diode for 1 Amp or less is the 1N4000 series devices. 
  9. Timothy J. Maloney (1992). Electricity: fundamental concepts and applications. Delmar Publishers. p. 404. ISBN 978-0-8273-4675-8. A Type No. 1N4004 diode, a popular diode for rectifying ac to dc. 
  10. 1N4001–1N4007 Datasheet
  11. 1N5400–1N5408 Datasheet
  12. Robert Diffenderfer (2005). Electronic devices: systems and applications. Thomson Delmar Learning. p. 54. ISBN 978-1-4018-3514-9. 
  13. 1N5401 Certificate of Compliance (PDF), 8 Apr 2011 
  14. 1N5408 Certificate of Compliance (PDF), 8 Apr 2011 
  15. 1N4001 Certificate of Compliance (PDF), 8 Apr 2011 
  16. 1N4007 Certificate of Compliance (PDF), 8 Apr 2011