Diode - 1N34A Germanium

Diode - 1N34A Germanium

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The 1N34A Germanium diode is an old standby in electronics. Widely used for detecting the rectifying efficiency or for switching on a radio, TV or stereo etc.


  • Flat junction capacitance
  • High mechanical strength


  • AM/FM detectors
  • Ratio detectors
  • FM discriminators
  • TV audio detectors
  • RF input proves
  • TV video detectors

Note: This is a surplus item. Due to the age of the components, the leads will have varying amounts of oxidation which may need to be removed.

Item ID:
Breakdown Voltage (V(BR))65 V
Forward Voltage Current (IF)4 mA min, 2 mA typical
Forward Voltage Drop (VF)1.0 V
Junction Capacitance (CJ)≤ 1 pF
Junction temperature (Tj)75°C
Operating And Storage Temperature (TJ, TSTG)-55°C to 75°C
Peak Forward Current (IFM)150 mA
Peak Non-repetitive Forward Surge Current (IFSM)0.5 A
Peak Repetitive Forward Surge Current (IFSR)200 mA
Peak Repetitive Inverse Voltage (PIV)65 V
Peak Reverse Voltage (VRM)45 V
Rectification Efficiency (nr)55 %
Rectified Output Current, average (IO)50 mA
Reverse Current (IR)≤ 100 μA
Reverse Leakage @ 10 V (IR)30 μA
Reverse Leakage @ 50 V (IR)500 μA
Reverse Voltage (VR)20 V
Surge Forward Current (Isurge)500 mA
Packaging Information
Packaging Dimensions2.5 in. × 1.1 in. × 1.1 in.
Weight (Packaging)0.0002 lbs.
PDF: Specification SheetAll Models
PNG: Vf CurvesAll Models

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet523.86 KB
PNG: Vf Curves Vf Curves168.25 KB
Questions? Contact us at [email protected], or give us a call at 480-820-5411

Product Reviews

4.75 out of 5 based on 8 reviews
jaspinwall - March 15th, 2024
3 out of 5

These are actually 1N270 diodes and not 1N34A. They clearly have the green cathode marking and the product images show curve traces that indicate these are 1N270s and not 1N34A. I'm giving them 3 stars because 1N270s are awesome too, but for anyone who is looking specifically for 1N34A diodes, that is not what these are.

Eric Hr - January 26th, 2024
5 out of 5

Probably the best low hassle germanium diode for use in guitar pedals. Use two in series to replace one Si diode as hard clippers and get more "hair". If you mix brands of 1N34A it works even better. You can also just add one AN34A to the Si diode in most pedals to give you more clean output, but the distortion has a bit more bite to it. Great for making asymmetrical clippers. The diodes you buy here will be the real deal vintage old stock. These are not "fakes" that are simular to Ge diodes. These are the real ones you want. You might even have to clean the leads before soldering becuase they have been in the box since 1972...

Dennis H. - January 17th, 2024
5 out of 5

Great price for a classic detector diode!

James G - January 2nd, 2024
5 out of 5

Nice diodes. I use them all the time for experimental receiver circuits.

Donald Martin - July 20th, 2023
5 out of 5

Ordered and received Diode - 1N34A package in a timely manner. Quality tests on them were excellent. Well done Antique Electronic Supply. My new parts source. Thank you.

Edward Vignati - April 18th, 2023
5 out of 5

I've dealt with antique electronic supply company many times over the years, excellent products, great prices at second to none customer service. Thank you for all you do

KR Doyle - March 4th, 2022
5 out of 5

Just what I needed

Manuel - May 3rd, 2015
5 out of 5

Wow! Just like my crystal radio of my youth. This diode worked
great in the radio circuit and it sure took me back! Great product and I'm happy I coud find this item on your online store. Thanks!
Manuel in New Mexico

Substitute Products

The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.