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Old 27th October 2005, 08:34 PM   #1
ichiban is offline ichiban  United States
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Default Help me spec this SCR?SRC capacitor

I have a cap I purchached in the late '80's
it has these markings
SCR PC2500
25uF +-10%
250V (what looks like a sinewave) 85'C
7.85
I'm wondering if its volts (250V) are AC as I suspect
and what would be its rating max. be in a DC voltage.
Would like to use it for power supple filtering.

Can't seem to find any info on the net.

Thanks in advance
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Old 27th October 2005, 09:11 PM   #2
Netlist is offline Netlist  Belgium
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In a nutshell:
25uF is the capacitance.

+-10% is the tolerance of the capacity.

250V with the sinewave ~ should be the AC voltage rating.
It's a bit odd as normally, one would expect a DC voltage sign.

85C: meaning it is tested for a certain lifetime a 85C, i.e. 2000 hours. Roughly, when temperature drops with xC the lifetime will double. Other will have to fill in the 'x'.

7.85: no idea.

Depending on what power supply you want to filter, 25uF is not a lot for say something like pass amps. There, you would think of something between 20000 and 200000uF.

/Hugo
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Old 28th October 2005, 07:00 AM   #3
ichiban is offline ichiban  United States
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Default Would be using it as a bypass

Would be using it as a bypass in an HarmonKardon Citation V.
for the driver stage which was changed to a cascoded diffamp
w/ccs running at 400 volts at the plate load. Need to know if
this cap is rated for 400v at least. The Solen site only lists PA
and PB nolonger the PC!? series of caps. I'll be dropping a
line to their sales dept which I would have done to start with
if I knew it was a Solen, which I think manufactued the SRC.
Thanks much for your reply.
=================================================
Depending on what power supply you want to filter, 25uF is not a lot for say something like pass amps. There, you would think of something between 20000 and 200000uF.

/Hugo [/B][/QUOTE]
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Old 28th October 2005, 09:30 AM   #4
Netlist is offline Netlist  Belgium
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Good approach.
Unless you are perfectly sure it is rated +400V I would consider buying one. The cost of a small cap is not worth the trouble.

/Hugo
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Old 28th October 2005, 08:34 PM   #5
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7.85 means build in July 1985
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