Hopefully this isn't too much of a shopping question. I am looking for off-the-shelf silicon carbide P-N junction diodes, but all I can find are Schottky ones. Do P-N version ones even exist commercially?


1 Answer 1


SiC pn diodes are not commercially manufactured for one simple reason:

They have a forward voltage of about 3 to 4 volts.

For almost any purpose, either a silicon pn diode or a SiC schottky is a better choice. Despite the famous leakiness of schottky diodes, SiC ones (due to the properties of silicon carbide) tend to have leakage currents more in line with the leakage of a silicon pn diode than a silicon schottky.

If, for some reason, you truly need a SiC pn diode, it may be possible to use the the body diode of a SiC MOSFET where you've tied gate to source. The gate-drain junction of a SiC JFET might work as well, though these are not usually rated for much if any forward current.

  • \$\begingroup\$ There are also BJTs, or there were, if you're so inclined; genesicsemi.com/sic-junction-transistor/GA10SICP12-263/… for example. Which could be B-E strapped, usable up to Vcbo and Ibmax. \$\endgroup\$ Dec 5, 2023 at 17:07
  • 1
    \$\begingroup\$ @TimWilliams I don't think any of those are still manufactured, though. They were briefly useful in the rare cases you needed an all-SiC (for temperature ratings, probably) normally-off device, but now that you can get true SiC MOSFETs (and not just Si MOSFETs cascoded with SiC JFETs), their niche in the market is basically gone. \$\endgroup\$
    – Hearth
    Dec 6, 2023 at 1:29

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.