Help with capacitor markings (pic attached)

scoob8000 · 30th November 2008, 08:12 PM

Hi all, I've got two MTX class D amp's that I'm going to attempt to repair.

I'm having some time trying to identify a few capacitors.

I'm not sure if the 7 is a 7 or some type of company logo.

Several of their markings from the tops:
7 1N0J 100
7 100NJ100

Figured a picture may help.

Netlist · 30th November 2008, 08:24 PM

You are looking at a 100nF (NanoFarad) 100V capacitor.
The '7' is most likely not a seven but a logo.

/Hugo

scoob8000 · 1st December 2008, 05:13 AM

Thanks for the reply!

100n makes sense for 100 nano farad.

Some googling leads me to believe the J is the tolerance? 5%

Following that convention, I'm still stumped by 1N0J. Is the zero some sort of multiplier making the 1 mean one nanofarad?

Here is one of my search results, not sure if I'm going in the right direction or not.

es44 · 1st December 2008, 05:43 AM

Look at the "n" as a dot, or expressed another way: If it had said 1n5, then it would have been a 1.5 nF capacitor. Continue down that line if you please... 2n2, 4n7 etc.

Best regards
Ebbe

poynton · 1st December 2008, 05:45 AM

The '7' looks more like an italic 'T'

Another photo may help.

Andy

Netlist · 1st December 2008, 06:46 AM

Scoob,

Every type - film, ceramic, electrolytic, SMD - has his own code or standard to mark the parts.

Look here and you'll find out more about it.
The J is indeed 5%.
Your 1N0 would be 1nF to me. In doubt, I always measure.

/Hugo

scoob8000 · 1st December 2008, 02:29 PM

Much thanks.

Before I posted I did find one site that referred to the N as the decimal, but what threw me off was they would put a trailing zero on a 1nf and not the 100nf.

I think I've got my parts list all figured out and ready to order.

Thanks again

es44 · 1st December 2008, 02:42 PM

Quote:

Originally posted by scoob8000

Before I posted I did find one site that referred to the N as the decimal, but what threw me off was they would put a trailing zero on a 1nf and not the 100nf.
Thanks again

That's because you won't see a 100.5nF capacitor, that way of marking capacitors first starts at <10nF.( at least the ones i've seen ), after 10n there's no use for a decimal.

You're right, it's a jungle out there

Best regards
Ebbe

scoob8000 · 18th December 2008, 07:55 PM

Why do I keep getting stumped on this.. Here's another one..

.047K100

Is that .047 nanofarads or .047 picofarads?

I get the K100 (10%, 100 volt)

es44 · 19th December 2008, 04:54 AM

Quote:

Originally posted by scoob8000
Why do I keep getting stumped on this.. Here's another one..

.047K100

Is that .047 nanofarads or .047 picofarads?

I get the K100 (10%, 100 volt)

That's a 0.047uF, or 47nF.

Best regards
Ebbe

30th November 2008, 08:12 PM	#1
scoob8000 diyAudio Member Join Date: Nov 2008	Help with capacitor markings (pic attached) Hi all, I've got two MTX class D amp's that I'm going to attempt to repair. I'm having some time trying to identify a few capacitors. I'm not sure if the 7 is a 7 or some type of company logo. Several of their markings from the tops: 7 1N0J 100 7 100NJ100 Figured a picture may help.

1st December 2008, 05:45 AM	#5
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	The '7' looks more like an italic 'T' Another photo may help. Andy __________________ If it ain't broke, break it !! Then fix it again. It's called DIY !

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30th November 2008, 08:24 PM	#2
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	You are looking at a 100nF (NanoFarad) 100V capacitor. The '7' is most likely not a seven but a logo. /Hugo

1st December 2008, 05:13 AM	#3
scoob8000 diyAudio Member Join Date: Nov 2008	Thanks for the reply! 100n makes sense for 100 nano farad. Some googling leads me to believe the J is the tolerance? 5% Following that convention, I'm still stumped by 1N0J. Is the zero some sort of multiplier making the 1 mean one nanofarad? Here is one of my search results, not sure if I'm going in the right direction or not.

1st December 2008, 05:43 AM	#4
es44 diyAudio Member Join Date: Apr 2005 Location: Fredericia, DK	Look at the "n" as a dot, or expressed another way: If it had said 1n5, then it would have been a 1.5 nF capacitor. Continue down that line if you please... 2n2, 4n7 etc. Best regards Ebbe

1st December 2008, 06:46 AM	#6
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Scoob, Every type - film, ceramic, electrolytic, SMD - has his own code or standard to mark the parts. Look here and you'll find out more about it. The J is indeed 5%. Your 1N0 would be 1nF to me. In doubt, I always measure. /Hugo

1st December 2008, 02:29 PM	#7
scoob8000 diyAudio Member Join Date: Nov 2008	Much thanks. Before I posted I did find one site that referred to the N as the decimal, but what threw me off was they would put a trailing zero on a 1nf and not the 100nf. I think I've got my parts list all figured out and ready to order. Thanks again

18th December 2008, 07:55 PM	#9
scoob8000 diyAudio Member Join Date: Nov 2008	Why do I keep getting stumped on this.. Here's another one.. .047K100 Is that .047 nanofarads or .047 picofarads? I get the K100 (10%, 100 volt)