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Old 4th June 2008, 12:03 AM   #1
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Default What value for this capacitor ?

can some one help me ?
what value for this capacitor ?

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Old 4th June 2008, 03:09 AM   #2
KP11520 is offline KP11520  United States
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IMO, I would think 75pf and 1000 volts.

Maybe you can find the schematic somewhere (online maybe).

Not sure what SEC means but S is 22% tolerance. You need a more clear answer on that because who knows, SEC might be a manufacturer code.

I hope this helps. Good luck!

Regards//Keith

BTW, what did you use to get a close up picture with that much detail and that sharp and so close?
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Old 4th June 2008, 03:28 AM   #3
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SEC is the mfr. code.
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Old 4th June 2008, 09:05 AM   #4
Elvee is offline Elvee  Belgium
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Hi,

This one is not used as a capacitor, but as a spark-gap (probably 1KV).
LV
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Old 4th June 2008, 09:28 AM   #5
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*the invisible gap now becomes blatantly obvious*

D'OH!

Yeah, CRT boards laying around here have a few of these.
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Old 4th June 2008, 04:22 PM   #6
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thank you
This caps. is from broken network hub.

I use nikon coolpix S200 digital camera 7M pixel and optical zoom.
and cropping this picture because is so big..
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Old 5th June 2008, 06:09 PM   #7
oshifis is offline oshifis  Hungary
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This is not a capacitor, it is a surge voltage protector. It can be found on every network card in PCs, in modems etc. Normally it is open circuit, but for overvoltage it is short circuit. You can not measure it. I've never seen one faulty.
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Old 5th June 2008, 07:20 PM   #8
trodas is offline trodas  Czech Republic
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Well, it is still capacitor by definition. 75pF is not that small capacity... Of couse the main job is the overvoltage protection, but that does not mean the capacitance is not there

Of course, this is just nitpicking
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Old 6th June 2008, 05:20 AM   #9
LK is offline LK  United States
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This part is a spark gap rated for 1,000 volts. As stated above, it to protect the circuit against surge voltages (greater than 1,000 volts). However the capacitance for this part is extremely low .75pF. Under normal operating conditions (no surges) this part has essentially no effect on the circuit. Also as stated above these parts rarely fail. One thing that can cause a problem is if debris or dirt gets into the slit (gap) causing a leakage path. You can clear out an foreign material by simply running a piece of paper through the gap.
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