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Commentator

Join Date: Nov 2007
Posts: 69

Circular connector pin terminology

11/13/2007 3:16 PM

What is the difference between say a 36 pin circular connector with shell size say 22 and say a 41 pin circular connector with say shell size 20?

What do the shell sizes and no. of pins actually mean in practical significance?

Thanks!

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Guru

Join Date: Sep 2007
Location: Wrong end of the yellow brick road in Oz
Posts: 930
Good Answers: 15
#1

Re: Circular connector pin terminology

11/14/2007 12:42 AM

guessing your talking about CPC from AMP (Circular Plastic Connector)

The number of pins is quite easy to signify what the differance is, and thats how many pins that specific connector can hold (max)

A 41 pin connector can have 36 pins, but not the other way around.

Now the shell sizing..

From the Tyco Electronics website - http://catalog.tycoelectronics.com/TE/bin/TE.Connect?C=18558&M=HELP&BML=&PID=172183&N=10146&G=G&RQS=C~1^M~BYPN^TCPN~692400-000^RQPN~HEX40L-AC-00-23-A13-3

"The size of connector shell as specified by the manufacturer. It is normally a two digit number between 08 and 24, although certain connectors are obtainable in either larger or smaller sizes. Some use letter codes."

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Commentator

Join Date: Nov 2007
Posts: 69
#2
In reply to #1

Re: Circular connector pin terminology

11/14/2007 8:27 AM

No, what I mean is , can I use a 41 pin instead of a 36 pin?

I mean are 41 pin suposed to be more powerful just because they have more pins?

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Guru

Join Date: Sep 2007
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#4
In reply to #2

Re: Circular connector pin terminology

11/14/2007 1:20 PM

You can as long as the load you try to put through it is not exceeding the maximum permissible for that other connector. More pins in the same shell size often means smaller pins and closer proximity for the solder buckets. This means you may not be able to carry the same amps without deteriorating integrity and or safety.

Check them out before you try unless there is no real risk like with very low voltages and low amps and nothing that can result in a costly breakdown if it goes POP.

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#5
In reply to #2

Re: Circular connector pin terminology

11/15/2007 4:22 PM

Lets say that you are serving 8 guests for dinner. You find that your cutlery is "Service for 12". The dinner comes out the same even if you have knives, forks and spoons not used.

Now if next week you have 16 guests... that is another problem.

Bill

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Guru

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#6
In reply to #5

Re: Circular connector pin terminology

11/15/2007 5:44 PM

and same with the connectors, you don't need to have all the pins used, or inserted, then you get blanking/ID plugs to give each connector a unique ID.

Shells, you have to match up, also the number of available pin positions within each connector.

We have used Shell-23 here with 37 pins, then a 7-pin connector for some power we needed, still in Shell-23 style

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Anonymous Poster
#3

Re: Circular connector pin terminology

11/14/2007 8:50 AM

you have to mate your contacts and your shells. A larger shell number usually indicates a larger connector outer shell size. You'll need to mate pin contacts with receptacle contacts and plug shells with receptacle shells. Usually you'll need to make the shell sizes match for them to mate. I don't know what connectors would mate with unmatched shell sizes but I'd guess not many.

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Guru

Join Date: Feb 2006
Posts: 1763
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#7

Re: Circular connector pin terminology

11/21/2007 7:25 PM

Circular-connectors are a large types & Standards as all the other connectors are, but mostly these are for Severe conditions like Water, Hermetically Sealing; Firm-Holding & like that.
Mostly for Armed-Forces & Aero-nautical environments.
Cheaper [plastic-Shells] may be used in Industry but not Mil-Std.
Mating of Male & Female is through Threads or by 1/4 turn-twist.
Pins may be of the same size & shape or Mixed pin sizes & Types like normal, Coaxial, Power, Shielded etc made for special purpose.
Hermetically-sealed do not have the choice of Inserting or ejection of pins. These are normally Solder lugs.

It depends on your project that how many types are used, but in development following points are considered:

1. Required Standards to abide. Mil-Std, Industrial Std or consumer goods.
2. Economy of cost & Inventory. Normally try to use minimum types.
3. Ease of assembly & repairs
4. Back-up availability.
and more ...

If you can get a catalogue or website of Farnells, RS Components or a renowned vendor you can get more info.

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Anonymous Poster
#8

Re: Circular connector pin terminology

02/02/2008 11:15 AM

You can contact TE area technical specialist team using web-site form.
Tyco started also a live chat, where the actual and future customers can ask the technical sepcialist. You can reach it from the homepage and catalogue pages.

BR, Peter Nagy

Product & Marketing Sepcialist
South-East Europe
Tyco Electronics.

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Participant

Join Date: Mar 2009
Posts: 2
#9

Re: Circular connector pin terminology

03/12/2009 1:43 AM

Try Circular connectors to get more details and catalogs.

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Anonymous Poster
#10

Re: Circular connector pin terminology

07/13/2010 1:24 PM

Shell size is the # of 1/64 increments of the diameter. The secondary number is the max number of contacts. i.e 22/14 size 22 with 14 contacts.

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Anonymous Poster
#11
In reply to #10

Re: Circular connector pin terminology

07/13/2010 1:26 PM

Correction shell size is # of 1/16 increments of diameter, not 1/64.. sorry for the mistype

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