Discussion in 'Troubleshooting and Repair' started by LectricCircuit, Apr 14, 2017.

1. ### LectricCircuit

33
2
Apr 7, 2017
Can someone tell me what this is? Some kind of capacitor I'm assuming. Could be completely wrong on that lol but also please instruct me on how to read it's specs by the numbers on it. I tried typing the numbers in a google search but came back with nothing. It has a plus sign on top then the numbers 330 below that and then j67 below the numbers. My old iPhone camera couldn't focus in up close.

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5,165
1,087
Dec 18, 2013
330 uF Tantalum capacitor, not sure on the voltage rating though.

3. ### davennModerator

13,798
1,939
Sep 5, 2009
what high rating ?

J = 6.3V

Edit:
you may have been thinking that the J was the tolerance
this would have been correct if the J immediately followed the value eg 330J unless there is a gap
eg 330 J then it is a voltage rating
and for yet another variation .... if the J precedes the 330 eg J 330 it is also a voltage rating

when the J is on the next line, I have found ( with lots of searching) that it is the voltage rating

in the OP's example the 67 following the J are most likely a manuf date code

Last edited: Apr 15, 2017
Arouse1973 likes this.

33
2
Apr 7, 2017
Thank u

5. ### elebish

177
12
Aug 16, 2013
330 uf is a lot of capacitance for that size cap! Just a thought!

6. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

25,482
2,830
Jan 21, 2010
That 330 may be 33uF. Often when you see these three digit codes, the last digit is the power of ten to multiple it by.

Just to make life more interesting, a capacitor can be marked in uF or pF., So 33uF may be marked as 33, 330, or 336. Typically values under 10uF are marked in pF, so 2.2uF is 225, and 0.1uF = 100nF = 100,000pF is 104.

7. ### elebish

177
12
Aug 16, 2013
Right Steve! Caps below 1 ufd are generally marked in pfds. I do believe it is a tantalum since the positive end is marked instead of the negative end. Tantalums usually have a large ufd value respect to size but voltage ratings are low and the leakage rates are very low, about the same as paper caps at the rated voltage. Don't use tantalums in place of regular electrolytics, even though the specs may be the same! The voltage rating refers to the dc that can be blocked but does not refer to the ac peak (spikes) value that may be present. Ed.