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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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15th Oct 2018, 6:09 pm | #1 |
Dekatron
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
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Voltage rating of these caps pls?
The 10nF ones are marked:
A100 103K C9727 The 1uF ones are marked: A1C 105M I’d be interested in the manufacturer too if anyone can help Thank you
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Al |
15th Oct 2018, 8:07 pm | #2 |
Octode
Join Date: May 2003
Location: Belper Derbyshire
Posts: 1,906
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Re: Voltage rating of these caps pls?
I have some identical ones here (black cased) that are 63V rated
Christopher Capener
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Interests in the collection and restoration of Tefifon players and 405 line television |
15th Oct 2018, 10:31 pm | #3 |
Dekatron
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
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Re: Voltage rating of these caps pls?
Thanks Chris, that’s great.
To be clear, is that for both types? Cheers!
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Al |
16th Oct 2018, 5:51 am | #4 |
No Longer a Member
Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
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Re: Voltage rating of these caps pls?
I'm pretty sure the 103's are 100V types. I have seen these before used in mil spec gear in circuits running over 50V.
As for the 105's anybody's guess. For something like those I wouldn't push them over 50v. Though the A1C might indicate 100v, but unless a reference could be found, I'd not risk it. The 1 could be a multiplier and the C 100. |
16th Oct 2018, 1:53 pm | #5 |
Heptode
Join Date: Dec 2014
Location: Lincoln, Lincolnshire, UK.
Posts: 583
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Re: Voltage rating of these caps pls?
I would have to double check, but I have fairly similar types which appear to be 100V DC but only 63V AC (which sounds sensible considering peak to peak).
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16th Oct 2018, 5:14 pm | #6 |
Heptode
Join Date: Mar 2009
Location: Portsmouth, Hampshire, UK.
Posts: 674
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Re: Voltage rating of these caps pls?
This is an AVX MR061C103KTA 0.3" square 0.2" pitch which looks very similar to your first cap. (10n 100v 10% X7R)
Catalog is here, details on page 32. Your second looks like an AVX SR series but the marking doesn't make sense to me. If I had to guess I'd say A for AVX, 1 for 100V, C for X7R (although Z5U is more usual for 1uF). Warm the cap up to around 60C, if the capacity drops like a stone it's Z5U. Jim |