[time-nuts] Power connectors continued
arnold.tibus at gmx.de
Thu Jun 22 20:34:38 EDT 2017
look to this spec. data from Amphenol found @ Mouser as example:
power Contacts: 55 Amperes (per contact)
Signal Contacts: 5 Amperes (per contact)
Power Contacts: .25 milliohms max
Signal Contacts: 20 milliohms max
Insulation Resistance: 5000 Megohms
DWV: 1500V DC
Operating Temperature: -40°C to +105°C
ok, for shure more expensive (LCC17-A3W3SM-2N0,
$ 9.45 per con. one side, solder connection)
http://www.mouser.com/ds/2/276/Mixed_Layout-472362.pdf e.g. for crimped
Not of interest?
But sorry, even being very interesting, I think we should not stress too
much the term 'time' in this discussion here ;-) .
Am 23.06.2017 um 01:33 schrieb Bob kb8tq:
> You can get and use PP’s at 30 to 50A in a 12V circuit without frying them or the cable they are
> attached to. Doing the same with a “Cannon” connector is not at all easy ….You can also bump up
> to the larger PP’s and get into a couple of hundred amps.
>> On Jun 22, 2017, at 6:54 PM, Arnold Tibus <arnold.tibus at gmx.de> wrote:
>> I can second Magnus and want to throw in some more details.
>> Cannon, Deutsch, Bendix, Souriau, Matrix, Amphenol, etc. etc. are (big)
>> companies manufacturing all kind of connectors and are n o t connector
>> type designations! Important are the type numbers of the manufacturer or
>> higher level specification numbers.
>> We used in the aircraft and spacecraft business naturally the military
>> (MS-) numbers listed in the MIL-QPL (or eg. for Spacelab with GSFC spec.
>> no). Most types of connectors are under these numbers available from
>> different manufacturers, of course with different manufacturer in house
>> part numbers. Attention: the 'same' connectors may be bought w/o the
>> Mil.-spec. sheets with somewhat lesser quality. Important details are
>> the max. mating number, the contact resistance (e.g. 20 mOhm) and the
>> max. continuous current, max. Voltage, vibration resistance and
>> reliability etc. Of course, this makes good connectors somewhat
>> 'expensive'. Hirel and non-magnetic gold plated D- subminiture type
>> connectors do survive e.g. the rocket launch phase (high vibrations),
>> vacuum and low temperatures and are still used for space projects.
>> The D-sub series of connectors was introduced by Cannon in 1952. They
>> are still available as standard, hirel, and non-magnetic versions. The
>> contacts were machined contacts forcrimping or soldering connection and
>> made of massive copper with gold finish. (more see e.g.
>> https://en.wikipedia.org/wiki/D-subminiature). Example for the standard
>> 9 pin connector designation (crimp): DEMAM-9S and DEMAM-9P. Today are a
>> big number of companies producing equivalent types. Cheap ones are
>> equipped with contacts made of sheetmetal. Nobody should expect then the
>> same spec. values as reliability, mating numbers, contact power rating etc.
>> It is up to the designer of a product to be informed and select the
>> right quality device for his product ...
>> I hope I could enlight a bit the connector selection and nomenclature point.
>> regards, 73
>> Arnold, DK2WT
>> Am 22.06.2017 um 21:10 schrieb Magnus Danielson:
>>> The second connect has been called "Cannon" and XLR, and is not
>>> generally recogniced as XLR, which is the product range name.
>>> Naming of the first connector as "Cannon" is at least for me and many
>>> others confusing. This is a good example how vendor name for a
>>> connector type is not a good thing. The first connector is a circular
>>> MIL-STD connector (don't remember the correct notation), and this is a
>>> product available from ITT Cannon as well as AMP.
>>> On 06/22/2017 08:42 PM, Mark Spencer wrote:
>>>> Sorry if I have caused any un due confusion thru my perhaps incorrect
>>>> use of the terms "cannon" and "XLR."
>>>> The green connector with 4 separate female contacts is what I
>>>> perhaps in correctly referred to as a "cannon" connector. The silver
>>>> connector with 3 separate female contacts was what I perhaps
>>>> incorrectly referred to as a "XLR" connector.
>>>> Both were in use in my lab powering time nuts gear.
>>>> Mark Spencer
>>>> mark at alignedsolutions.com
>>>> time-nuts mailing list -- time-nuts at febo.com
>>>> To unsubscribe, go to
>>>> and follow the instructions there.
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> and follow the instructions there.
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the time-nuts