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Old 6th September 2008, 09:00 AM   #1
Puffin is offline Puffin  United Kingdom
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Default Stupid Question

Is the right leg of both of these tants+
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Old 6th September 2008, 09:26 AM   #2
ratza is offline ratza  Romania
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Yes.
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Old 6th September 2008, 02:04 PM   #3
Nuuk is offline Nuuk  United Kingdom
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Not a stupid question Puffin, but a silly thread title!

Remember when the next person comes looking for an answer to the same question, it helps to be able to see the subject in the thread title. "Stupid question" doesn't tell us anything but "Tantalum capacitor polarity question" speaks volumes!
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Old 6th September 2008, 02:20 PM   #4
Puffin is offline Puffin  United Kingdom
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Got you curious though, didn't it!
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Old 6th September 2008, 10:25 PM   #5
bichi is offline bichi  United States
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Correct, right legs in your pictures are positive (+) leads.
- most tantalum capacitor marking/bar indicate positive (+) lead
- which is opposite to most aluminum electrolytics, where marking/bar indicate negative (-) lead

Typical dipped tantalum marking, lifted from KEMET literature below.

See page 63, KEMET dipped tantalum:
http://www.kemet.com/kemet/web/homep...570A50016090E/$file/F3100_TaDipRad.pdf

ps: no such thing as a stupid question...
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File Type: jpg tant radial polarity marking.jpg (19.1 KB, 254 views)
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Old 6th September 2008, 11:10 PM   #6
Puffin is offline Puffin  United Kingdom
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Thanks Guys.
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Old 8th September 2008, 05:18 PM   #7
AndrewT is offline AndrewT  Scotland
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Puffin,
Yes, stupid thread title!
Go and ask, nicely, if the mods will retitle your thread for us.
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Old 8th September 2008, 05:53 PM   #8
BWRX is offline BWRX  United States
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That sounds better, no?
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Old 8th September 2008, 05:58 PM   #9
timpert is offline timpert  Netherlands
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Just my 2 cents here:

In many electronic parts, the longer lead is the positive lead (provided that they are unclipped). This is true for both tants and normal electrolytics.

Better be safe than sorry: tants can pop nastily if they are connected in reverse polarity, so there's no need to be ashamed for checking before mouting them!
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Old 8th September 2008, 06:09 PM   #10
Nuuk is offline Nuuk  United Kingdom
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If only the rest of the world was so easy to put right!
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