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Old 26th February 2008, 09:23 PM   #1
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Default 4 lead capacitor

I've just bought a load of BHC caps off of Ebay, and very nice they are too.
But, they have 4 leads.
What is the pinout for 4 legged capacitors? Is one of them -ve, the remainder +ve?

Cheers,
Phil
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Old 27th February 2008, 06:50 AM   #2
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1= positive(+)
5= negative(-)
2 and 3= nothing(for solid connection on the board)
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Old 27th February 2008, 07:52 AM   #3
pooge is offline pooge  United States
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2 input leads, 2 output leads

check their website for terminal location.

got any to spare?
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Old 27th February 2008, 08:49 AM   #4
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Quote:
Originally posted by pooge
2 input leads, 2 output leads

check their website for terminal location.

got any to spare?
I've got the same caps and you don't need pin2 and 3 it's only for secure connection.
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Old 27th February 2008, 09:03 AM   #5
pooge is offline pooge  United States
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Well, it depends on which model you are talking about. If it is the 4 terminal series like the following, they are not just supports:

http://www.bhc.co.uk/pdf/aln20s.pdf
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Old 27th February 2008, 09:55 AM   #6
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Phil,do you've a pic of the capacitor or can you give the exact numbers?
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Old 27th February 2008, 10:46 AM   #7
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Hi,
I'll try and sort out a photo later on.
It does indicate that pin 2 should be negative (although pin 2 appeared ambiguous last time I looked), so I assume the others are either all positive, or just one, and the remaining two are support.
BTW meanman,
"1= positive(+)
5= negative(-)
2 and 3= nothing(for solid connection on the board)"
Did you mean 4=negative?

Thanks for all the replies. I don't think its anything like pooge suggested, but I could well be wrong.

Its a 4100uF 70V electrolytic, and its blue

Cheers,
Phil
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Old 27th February 2008, 12:17 PM   #8
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Here's the picture of them used on Ebay, if it helps.
I'll take a more sensible picture tonight.
Attached Images
File Type: jpg bhc_caps.jpg (18.2 KB, 216 views)
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Old 27th February 2008, 12:27 PM   #9
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When you look at the pins are there no numbers stamped in?
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Old 27th February 2008, 12:47 PM   #10
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Yes there are numbers, but if I recall, it quotes one of them as negative, and the rest are not described.
Anyway, they look like they're maybe ALP10A caps, so I'll see if I can find the datasheet.
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