TE Connectivity 163090-2 Contacts To CPC Round Plug-in Connector Nominal current: See data sheet Number of pins: 1 163090-2 Datenbogen

AMP Circular Connectors for
Commercial Signal and Power Applications

9

Catalog 82021

Dimensions are in inches and 

Dimensions are shown for

USA: 1-800-522-6752

South America: 55-11-2103-6000

Revised 7-07

millimeters unless otherwise 

reference purposes only.

Canada: 1-905-470-4425

Hong Kong: 852-2735-1628

specified. Values in brackets

Specifications subject 

Mexico: 52-55-1106-0800

Japan: 81-44-844-8013

www.tycoelectronics.com

are metric equivalents.

to change.

C. America: 57-1-254-4444

UK: 44-208-420-8341

All part numbers

are RoHS Compliant.

The presentation of current-
carrying capacity in AMP 
product specifications includes
two parts:

■

First, a base curve showing
current levels versus T-rise for
a single circuit and the largest
wire size (See figure 1). This
represents the maximum
current capacity of the
contact. The curve is usually
flat up to 75°C ambient and
then drops off. Up to 75°C, the
30°C T-rise limits the amount
of current, and above 75°C
the current must be reduced
to keep the combination of
ambient temperature and 
T-rise from exceeding the
maximum operating tempera-
ture of 105°C.

■

Next are rating factors, a
table of multipliers to account
for connector loading and for
smaller wire sizes (See figure 2).
The designer first determines
the base current for the
ambient conditions of the
application; then multiplies
this base current by the rating
factors to find the current
level for the application’s
loading factor and wire size.

The current-rating method
gives designers practical
values applicable to their appli-
cations. While the specified
current levels for a contact may
be lower than for other testing
methods, they are more practi-
cal and simplify the system
design process.
“Spec-manship” is replaced
by a realistic assessment of the
current-carrying capacity of a
contact under varying condi-
tions of temperature, connector
loading, and wire size.
Specific current-carrying data
based on EOL and % loading is
available from Tyco Electronics.
Please contact your local 
Tyco Electronics Sales Engineer
or call Tyco Electronics.

As previously stated, choosing
the correct connector/contact
combination is fundamental
to the successful function of
all connectors. The Selector
Chart shown at right, is
designed to simplify your choice

*Note: Data is not typical of a
specific CPC connector configu-
ration. For specific current 
rating information based on %
connector loading, contact 
Tyco Electronics.

To demonstrate the method of
specifying current, consider the
following application conditions;
an ambient temperature of 65°C,
a 50% loading of contacts in
the housing, and 20 AWG
[0.6mm

2

] wire.

■

From Figure 1, the base
current rating is 14 ampere
with 18 AWG [0.8mm

2

] wire.

■

Figure 2, the rating factor for
50% loading and 20 AWG
[0.6mm

2

] wire is 0.68.

■

The specific rating for this
application is the product of
the base rating and the rating
factor: 

14 x 0.68 = 9.5 ampere

■

Each of the contacts can
carry 9.5 ampere.

■

However, if the ambient temper-
ature is 80°C the allowable 
T-rise becomes 25°C. The base
current must be lowered to 
12.8 ampere so that the 105°C
maximum operating tempera-
ture is not exceeded. The
current rating then becomes: 

12.8 x 0.68 = 8.7 ampere.

CPC Series 1

✔

✔

✔

✔

CPC Series 2

✔

CPC Series 3

✔

CPC Series 4

✔

✔

✔

✔

CPC Series 5

✔

CPC Series 6

✔

✔

✔

✔

CPC 5015

✔

CMC Series 1

✔

✔

✔

✔

CMC Series 2

✔

CMC Series 3

✔

CMC Series 4

✔

✔

✔

✔

Ambient Temperature (°C)

of connectors and their accept-
able contacts. Once you have
selected the wire size, current-
carrying capacity need,
number of positions required,
and the type of contacts
needed in your choice of
connector, refer to this matrix
for a quick look at exactly what
is acceptable in a given
connector type.