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97-3108A-12

Amphenol® 97 Series Connectors

Amphenol Aerospace 

Guide to Selecting a Connector

In selecting a connector, it first must be

determined if a non-environmental 97 A

or B Series 5015 type is required or if an

environmental MS-5015 Class E, F, or

R type* is required.

If determined that the general duty,

non-environmental 97 series is the

choice - then this catalog is appropriate

to your needs

The following 8 steps apply to for­

mulation of a part number.**

1

How many wires are you

going to connect?

What gauge?

These two questions are important, be-

cause they indicate which insert you

need. There are literally hundreds to

choose from.

The insert arrangements for solder

contact connectors are illustrated on

pages 6-11. The inserts most often used

are highlighted on these pages.

Here’s an example of how to choose

an insert arrangement. Say you want to

connect eight 16-ga. wires, - first find

the section of arrangements contain­ing

8 contacts. Insert number 20-7 is the

one you want because it contains eight

16-ga. contacts and it is one of the most

often used. The one you choose might

depend on your space or voltage re-

quirements. The voltage capacity of

each insert is listed under its diagram.

If you have more than one wire size

to connect, the method is essentially the

same. Actually, the insert configura­tions

for multiple-size wires are a lot more

flexible than they appear. That’s be-

cause you can always solder a smaller

wire to a larger contact. How­ever, sol-

dering a large wire to a small contact

isn’t recommended because of size and

current requirements.

2

What if several identical

connectors have different

functions?

Here’s a situation to watch out for. You

have four identical receptacles on a

panel. One carries high current loads.

The others have low current functions.

A plug mated with the wrong receptacle

(cross-mating) could ruin your valu­able

equipment.

To avoid cross-mating, you can order

identical inserts positioned in both the

plugs and receptacles at vari­ous angles

from standard. These variat­ions from

standard position are called alternate

insert positions, and are described on

page 12.

3 What kind of receptacle do

you need?

For Wall Mounting   Use a wall recep­

tacle, type 3100. The elongated back of

this receptacle extends through thick

wall material. It is threaded to accept

standard hardware fittings.

For Unmounted Applications   Use

the cable receptacle, type 3101.

For Box or Panel Mounting   Use the

box receptacle, type 3102. This recep­

tacle’s back is short to conserve space.

It is not threaded on the back end and is

used when no accessories such as

clamps are needed.

4 What kind of plug do

you need?

For ordinary situations   The straight

plug, type 3106 meets most connector

requirements. However  .  .  .

when space is critical   you may want

to consider using an angle plug, type

3108. This type plug lets the cable enter

your equipment at a right angle.

5

Which connector gets the

socket? - the receptacle or

the plug?

You’re at the point where you desig­nate

which inserts are used with which

shells. Either pin or socket inserts can

be used with plugs or receptacles.

Here’s a good rule of thumb. Order

the sockets for the connector at the

“hot” side of the circuit. By having sock­

ets at the power source, there’s little

chance that a wayward finger or screw­

driver will short the circuit or cause per-

onal injury.

The designation for sockets is sim­ply

S in a part number, following the insert

code number. For pins, the des­ignation

is P. Therefore, the 20-7P insert would

have pin contacts, while the 20-7S in-

sert would have socket contacts.

6

What type of plating is

pre­ferred?

If you prefer the standard olive cad­

mium, non-reflective, electrically con­

ductive finish, then no suffix number is

required. Other plating variations are

available, including environmentally

friendly zinc alloy. See how to order in-

structions for the various plating fin­

ishes offered for 97 Series solder con­

nectors on page 18.

7 Do you need any

accessories?

Accessories - cable clamps, protection

caps and chains, conduit adapters,

and panel gaskets are shown on pages

28-32.

* If an environmental type SAE AS50151, F or RClass is required, then

the catalog that should be consulted is IC-5 AC and SAE AS50151

Threaded Cylindrical Connectors. See www.amphenol-industrial.com

for on-line catalogs or contact Amphenol, Sidney, NY.

2

** These steps are for solder type connectors which are described in detail

on pages 3-18. If a crimp type connector is needed, the same steps ap-

ply, however, you should consult pages 19-27 for details on 97 Series

connectors with crimp contacts.

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