At a hamfest I picked up a bunch of what I think are axial lead tubular
metal case tantalum capacitors by Kemet. Case size B and C. I'm going to
call Kemet tomorrow but in the mean time I wonder if anyone can decipher the
code the capacitance and voltage.
+M 39003 01-2035 7440MB 31433 JM, it measures 70 microfarads
+M390003 01-2021 7452MD 31433 MW , it measures 17 microfards
M390003 01-K 2017 7426MA 31433 JA, it measures 33 microfarads

From the Kemet website I know that M390003 is mil-spec and the 31433 is the
source code whatever that means. I think the last two letters are the date
code but the 01-XXX and XXMX escape me but I'd guess it's the stuff I want
to know! Any help appreciated.

73
Hank WD5JFR

After several calls to the factory I was able to find someone who had a book
on the codes. Here's what he gave me when he figured out what number was
important.
2116 = 1uF @ 50V
2064 = 6.8uF @ 35V
2139 = 18uF @ 50V
2031 = 22 uF @ 15V
2017 = 33uF @ 10V
2004-J = 47uF @ 6V
2035 = 68uF @ 15V
2021 = 100uF @ 10V
I've measured several on two different capacitor meters and all read close
to what the factory told me. I wonder why they coded the values with
numbers that don't make any sense? Military intellligence?
73
Hank WD5JFR

"Henry Kolesnik" wrote in message
news
At a hamfest I picked up a bunch of what I think are axial lead tubular
metal case tantalum capacitors by Kemet. Case size B and C. I'm going to
call Kemet tomorrow but in the mean time I wonder if anyone can decipher
the
code the capacitance and voltage.
+M 39003 01-2035 7440MB 31433 JM, it measures 70 microfarads
+M390003 01-2021 7452MD 31433 MW , it measures 17 microfards
M390003 01-K 2017 7426MA 31433 JA, it measures 33 microfarads

From the Kemet website I know that M390003 is mil-spec and the 31433 is
the
source code whatever that means. I think the last two letters are the
date
code but the 01-XXX and XXMX escape me but I'd guess it's the stuff I want
to know! Any help appreciated.

73
Hank WD5JFR

In article om,
"Henry Kolesnik" wrote:

After several calls to the factory I was able to find someone who had a book
on the codes. Here's what he gave me when he figured out what number was
important.
2116 = 1uF @ 50V
2064 = 6.8uF @ 35V
2139 = 18uF @ 50V
2031 = 22 uF @ 15V
2017 = 33uF @ 10V
2004-J = 47uF @ 6V
2035 = 68uF @ 15V
2021 = 100uF @ 10V
I've measured several on two different capacitor meters and all read close
to what the factory told me. I wonder why they coded the values with
numbers that don't make any sense? Military intellligence?
73
Hank WD5JFR

The numbers, like 2116, are just sequencial numbers on a very large
table that covers many pages in a manual. The numbers make sense
when you have the manual.

Al

--
There's never enough time to do it right the first time.......

On Mon, 08 Mar 2004 21:44:10 GMT Al wrote:

In article om,
"Henry Kolesnik" wrote:

After several calls to the factory I was able to find someone who had a book
on the codes. Here's what he gave me when he figured out what number was
important.
2116 = 1uF @ 50V
2064 = 6.8uF @ 35V
2139 = 18uF @ 50V
2031 = 22 uF @ 15V
2017 = 33uF @ 10V
2004-J = 47uF @ 6V
2035 = 68uF @ 15V
2021 = 100uF @ 10V
I've measured several on two different capacitor meters and all read close
to what the factory told me. I wonder why they coded the values with
numbers that don't make any sense? Military intellligence?

The numbers, like 2116, are just sequencial numbers on a very large
table that covers many pages in a manual. The numbers make sense
when you have the manual.

Okay, but why pick an identifiction method that requires a manual?
Most other components this size, including theirs, just have the
relevant numbers printed on them.

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------

In article ,
Jim Adney wrote:

On Mon, 08 Mar 2004 21:44:10 GMT Al wrote:

In article om,
"Henry Kolesnik" wrote:

After several calls to the factory I was able to find someone who had a
book
on the codes. Here's what he gave me when he figured out what number was
important.
2116 = 1uF @ 50V
2064 = 6.8uF @ 35V
2139 = 18uF @ 50V
2031 = 22 uF @ 15V
2017 = 33uF @ 10V
2004-J = 47uF @ 6V
2035 = 68uF @ 15V
2021 = 100uF @ 10V
I've measured several on two different capacitor meters and all read close
to what the factory told me. I wonder why they coded the values with
numbers that don't make any sense? Military intellligence?

The numbers, like 2116, are just sequencial numbers on a very large
table that covers many pages in a manual. The numbers make sense
when you have the manual.

Okay, but why pick an identifiction method that requires a manual?
Most other components this size, including theirs, just have the
relevant numbers printed on them.

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------

OK, let me give you a few example lines from the manual:

uF Case tol. Failure Rate (%/1000hrs) DC Leakage in uA
Code % 1.0 0.1 0.01 0.001 25C 85C 125C

5.6 A 5 5001 5201 5401 5601 0.3 6 7.5
5.6 A 10 2241 2481 2721 2961 0.3 6 7.5
6.8 A 5 5002 5202 5402 5602 0.3 6 7.5
6.8 A 10 2242 2482 2722 2962 0.3 6 7.5
6.8 A 20 2243 2483 2723 2963 0.3 6 7.5

So a M38003/01-5001 is unique. I left out the dissipation factor for
simplicty.

As you can see, there is much more information in this code number than
just the capacitance value and the voltage. When a component is bought
to this specification, it will meet it. If you buy a random FF uF VV
volt capacitor, you have no clue as to what you have with respect to
leakage, reliability, dissipation factor and the like.

al

--
There's never enough time to do it right the first time.......

On Tue, 09 Mar 2004 14:28:56 GMT Al wrote:

In article ,
Jim Adney wrote:

Okay, but why pick an identifiction method that requires a manual?
Most other components this size, including theirs, just have the
relevant numbers printed on them.

OK, let me give you a few example lines from the manual:

uF Case tol. Failure Rate (%/1000hrs) DC Leakage in uA
Code % 1.0 0.1 0.01 0.001 25C 85C 125C

5.6 A 5 5001 5201 5401 5601 0.3 6 7.5
5.6 A 10 2241 2481 2721 2961 0.3 6 7.5
6.8 A 5 5002 5202 5402 5602 0.3 6 7.5
6.8 A 10 2242 2482 2722 2962 0.3 6 7.5
6.8 A 20 2243 2483 2723 2963 0.3 6 7.5

So a M38003/01-5001 is unique. I left out the dissipation factor for
simplicty.

As you can see, there is much more information in this code number than
just the capacitance value and the voltage. When a component is bought
to this specification, it will meet it. If you buy a random FF uF VV
volt capacitor, you have no clue as to what you have with respect to
leakage, reliability, dissipation factor and the like.

I have a similar page here from the Sprague/Vishay catalog. In this
case it just happens to be for some caps which I picked up surplus
which are marked M39006/25-xxxx.

In this case the xxxx code pins down the tolerance and failure rate,
just as the Kemet does above (note that everything else above is the
same.) OTOH, the Sprague/Vishay caps are also labeled with their C and
V ratings, as well as the tolerance. Only the failure rate is left
unexplained. There is also an H-code for high vibration which you
might need the catalog page to interpret.

BTW, both manufacturers have a code for an M failure rate, which is
1.0% per 1000 hours. I find it hard to believe that anyone would buy
such a device, especially the military. The ones I got were the R
rate, .01% per 1000 hours. Those are the best that they offer and I'll
bet those are the only ones that ever get sold.

So I still don't think it's too much to ask that the most important
data be printed out separately.

Obviously, I don't tend to think like the military....

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------

On Tue, 09 Mar 2004 14:28:56 GMT Al wrote:

In article ,
Jim Adney wrote:

Okay, but why pick an identifiction method that requires a manual?
Most other components this size, including theirs, just have the
relevant numbers printed on them.

OK, let me give you a few example lines from the manual:

uF Case tol. Failure Rate (%/1000hrs) DC Leakage in uA
Code % 1.0 0.1 0.01 0.001 25C 85C 125C

5.6 A 5 5001 5201 5401 5601 0.3 6 7.5
5.6 A 10 2241 2481 2721 2961 0.3 6 7.5
6.8 A 5 5002 5202 5402 5602 0.3 6 7.5
6.8 A 10 2242 2482 2722 2962 0.3 6 7.5
6.8 A 20 2243 2483 2723 2963 0.3 6 7.5

So a M38003/01-5001 is unique. I left out the dissipation factor for
simplicty.

As you can see, there is much more information in this code number than
just the capacitance value and the voltage. When a component is bought
to this specification, it will meet it. If you buy a random FF uF VV
volt capacitor, you have no clue as to what you have with respect to
leakage, reliability, dissipation factor and the like.

I have a similar page here from the Sprague/Vishay catalog. In this
case it just happens to be for some caps which I picked up surplus
which are marked M39006/25-xxxx.

In this case the xxxx code pins down the tolerance and failure rate,
just as the Kemet does above (note that everything else above is the
same.) OTOH, the Sprague/Vishay caps are also labeled with their C and
V ratings, as well as the tolerance. Only the failure rate is left
unexplained. There is also an H-code for high vibration which you
might need the catalog page to interpret.

BTW, both manufacturers have a code for an M failure rate, which is
1.0% per 1000 hours. I find it hard to believe that anyone would buy
such a device, especially the military. The ones I got were the R
rate, .01% per 1000 hours. Those are the best that they offer and I'll
bet those are the only ones that ever get sold.

So I still don't think it's too much to ask that the most important
data be printed out separately.

Obviously, I don't tend to think like the military....

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------

In article ,
Jim Adney wrote:

On Mon, 08 Mar 2004 21:44:10 GMT Al wrote:

In article om,
"Henry Kolesnik" wrote:

After several calls to the factory I was able to find someone who had a
book
on the codes. Here's what he gave me when he figured out what number was
important.
2116 = 1uF @ 50V
2064 = 6.8uF @ 35V
2139 = 18uF @ 50V
2031 = 22 uF @ 15V
2017 = 33uF @ 10V
2004-J = 47uF @ 6V
2035 = 68uF @ 15V
2021 = 100uF @ 10V
I've measured several on two different capacitor meters and all read close
to what the factory told me. I wonder why they coded the values with
numbers that don't make any sense? Military intellligence?

The numbers, like 2116, are just sequencial numbers on a very large
table that covers many pages in a manual. The numbers make sense
when you have the manual.

Okay, but why pick an identifiction method that requires a manual?
Most other components this size, including theirs, just have the
relevant numbers printed on them.

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------

OK, let me give you a few example lines from the manual:

uF Case tol. Failure Rate (%/1000hrs) DC Leakage in uA
Code % 1.0 0.1 0.01 0.001 25C 85C 125C

5.6 A 5 5001 5201 5401 5601 0.3 6 7.5
5.6 A 10 2241 2481 2721 2961 0.3 6 7.5
6.8 A 5 5002 5202 5402 5602 0.3 6 7.5
6.8 A 10 2242 2482 2722 2962 0.3 6 7.5
6.8 A 20 2243 2483 2723 2963 0.3 6 7.5

So a M38003/01-5001 is unique. I left out the dissipation factor for
simplicty.

As you can see, there is much more information in this code number than
just the capacitance value and the voltage. When a component is bought
to this specification, it will meet it. If you buy a random FF uF VV
volt capacitor, you have no clue as to what you have with respect to
leakage, reliability, dissipation factor and the like.

al

--
There's never enough time to do it right the first time.......

On Mon, 08 Mar 2004 21:44:10 GMT Al wrote:

In article om,
"Henry Kolesnik" wrote:

After several calls to the factory I was able to find someone who had a book
on the codes. Here's what he gave me when he figured out what number was
important.
2116 = 1uF @ 50V
2064 = 6.8uF @ 35V
2139 = 18uF @ 50V
2031 = 22 uF @ 15V
2017 = 33uF @ 10V
2004-J = 47uF @ 6V
2035 = 68uF @ 15V
2021 = 100uF @ 10V
I've measured several on two different capacitor meters and all read close
to what the factory told me. I wonder why they coded the values with
numbers that don't make any sense? Military intellligence?

The numbers, like 2116, are just sequencial numbers on a very large
table that covers many pages in a manual. The numbers make sense
when you have the manual.

Okay, but why pick an identifiction method that requires a manual?
Most other components this size, including theirs, just have the
relevant numbers printed on them.

-
-----------------------------------------------
Jim Adney
Madison, WI 53711 USA
-----------------------------------------------

In article om,
"Henry Kolesnik" wrote:

After several calls to the factory I was able to find someone who had a book
on the codes. Here's what he gave me when he figured out what number was
important.
2116 = 1uF @ 50V
2064 = 6.8uF @ 35V
2139 = 18uF @ 50V
2031 = 22 uF @ 15V
2017 = 33uF @ 10V
2004-J = 47uF @ 6V
2035 = 68uF @ 15V
2021 = 100uF @ 10V
I've measured several on two different capacitor meters and all read close
to what the factory told me. I wonder why they coded the values with
numbers that don't make any sense? Military intellligence?
73
Hank WD5JFR

The numbers, like 2116, are just sequencial numbers on a very large
table that covers many pages in a manual. The numbers make sense
when you have the manual.

Al

--
There's never enough time to do it right the first time.......