# Nichicon aluminum electrolyic capacitor identification

**URL:** <https://forum.digikey.com/t/nichicon-aluminum-electrolyic-capacitor-identification/59219>\
**Category:** Capacitors\
**Tags:** nichicon, cross-reference, part-identification, aluminum-electrolytic-capacitors\
**Created:** [August 20, 2025, 7:14pm UTC](https://forum.digikey.com/t/nichicon-aluminum-electrolyic-capacitor-identification/59219 "2025-08-20T19:14:45Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![davhavranek](https://avatars.discourse-cdn.com/v4/letter/d/13edae/32.png) [@davhavranek](https://forum.digikey.com/u/davhavranek)\
**Post date:** [August 20, 2025, 7:14pm UTC](https://forum.digikey.com/t/nichicon-aluminum-electrolyic-capacitor-identification/59219/1 "2025-08-20T19:14:45Z")

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Hi, I need some help identifying part numbers.

I have a J2 10C WJ aluminum electrolyic capacitor

I think they are a Nichicon capacitor.

What I think so far.

J2 is the lot number

I can’t figure out the 10 ? is it the capacitance ? 10 uf ?

is the C the voltage 10 volts ?

is the WJ the series ? and is it in fact a Nichicon capacitor ?

I also need.

1. 1R 100 6.3v = 1R lot no. 100 capacitance and 6.3 volts

2. 1S 22 6.3 = 1S lot no. 22 capacitance and 6.3 volts

3. 1N 47 6.3 = 1N lot no. 47 capacitance and 6.3 volts

4. again J2 10C WJ = J2 10 capacitance ? C voltage ? and WJ series ?

I’m looking for proper part numbers and or a cross reference for the above items, part numbers.

Your help would be very appreciated.

Thank You ,

David

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**Author:** ![Rob\_Johnson](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rob\_Johnson](https://forum.digikey.com/u/Rob_Johnson)\
**Post date:** [August 20, 2025, 7:37pm UTC](https://forum.digikey.com/t/nichicon-aluminum-electrolyic-capacitor-identification/59219/2 "2025-08-20T19:37:05Z")

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Hello, welcome to the TechForum!

Here is a [list of capacitors](https://www.digikey.com/en/products/filter/aluminum-electrolytic-capacitors/58?s=N4IgjCBcoGwJxVAYygMwIYBsDOBTANCAPZQDaIALAAxwDMdIAuoQA4AuUIAymwE4CWAOwDmIAL6EATFQoJoIFJAw4CxMiEmSABAFaAYiEIUA7LoOEwVKmcPhr%252Bpqw6QQAVUH82AeVQBZXOjYAK68uOJSVMZyyGhYeIQkkOQwAHS0WgBqtpaZjiDsnO6ePv6BIWESIAC0kogKUHxBqonkAKxMYpW1SQroLB1AA) I was able to find in our system for these values, but you will need to confirm the physical size of your parts to confirm which ones will work for you.

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<div class="post-metadata">

**Author:** ![davhavranek](https://avatars.discourse-cdn.com/v4/letter/d/13edae/32.png) [@davhavranek](https://forum.digikey.com/u/davhavranek)\
**Post date:** [August 20, 2025, 8:26pm UTC](https://forum.digikey.com/t/nichicon-aluminum-electrolyic-capacitor-identification/59219/3 "2025-08-20T20:26:45Z")

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Hi Rob, Thank you for your time.

Could you tell me if I’m reading the capacitor properly?

1-3 are pretty straight forward but, no. 4 has me confused.

I need to confirm is 10C in fact 10 uf and the C in fact 10 volts ?

J2 10C WJ

Thanks,David

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**Author:** ![Klint\_12443](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/klint_12443/32/56741_2.png) [@Klint\_12443](https://forum.digikey.com/u/Klint_12443)\
**Post date:** [August 20, 2025, 9:32pm UTC](https://forum.digikey.com/t/nichicon-aluminum-electrolyic-capacitor-identification/59219/4 "2025-08-20T21:32:09Z")

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Hello davhavranek,

The WJ is the series, the JC is the lot code, 10 is the capacitance value, and C means it is rated for 16V. This information is outlined on Nichicon’s [datasheet](https://www.nichicon.co.jp/english/products/pdf/e-wj.pdf) for the WJ series:

 ![image](https://global.discourse-cdn.com/digikey/original/3X/9/a/9a3b5a259fc4b499dcf5bd4299c7b5002848bcd5.png)

Unfortunately, as evidenced [HERE](https://www.digikey.com/en/products/filter/aluminum-electrolytic-capacitors/58?s=N4IgTCBcDaIO4CsCMBhJAGEBdAvkA), these are obsolete and no longer available. There are, however plenty of substitutes to choose from using the link below.

> **[DigiKey Component Cross Reference Tool](https://www.digikey.com/en/cross-reference?search=UWJ1C100MCL1GB)**

Regards,  
Klint

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<div class="post-metadata">

**Author:** ![davhavranek](https://avatars.discourse-cdn.com/v4/letter/d/13edae/32.png) [@davhavranek](https://forum.digikey.com/u/davhavranek)\
**Post date:** [August 21, 2025, 12:44pm UTC](https://forum.digikey.com/t/nichicon-aluminum-electrolyic-capacitor-identification/59219/5 "2025-08-21T12:44:20Z")

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Hi Klint,  
Thanks for the clarification. I guess I had brain freeze! I guess I couldn’t get over the fact that the other caps I was looking for were 6.3 volts and that one was 16 volts.  
Thank very much for help and time.  
Much appreciated,  
David