DO NOT BUY TE Connectivity, DO NOT BUY Datasheet - Page 8

• Manufacturer Part Number: DO NOT BUY
• Manufacturer: TE Connectivity
• Type: Guide Pinr

Specifications of DO NOT BUY

• Product Length (mm): 21.08mm
• Product Depth (mm): 6.35mm
• Lead Free Status / RoHS Status: Not Compliant

8
The presentation of current-
carrying capacity in AMP
product specifications includes
two parts:
Practical Values
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 realis-
tic and simplify the system
design process.
“Spec-manship” is replaced
by a realistic assessment of the
current-carrying capacity of a
Connector/Contact
Acceptability
As previously stated, choosing
the appropriate connector/con-
tact combination is fundamental
to the successful function of all
connectors. The Selection Chart,
shown at right, is designed to
simplify your choice of connec-
tors and their acceptable
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.
Dimensions are shown for reference
purposes only.
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 cur-
rent 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.
Contact Selection Chart
M Series
Pin and Socket Connectors
Note: Data is not typical of a
specific M Series connector
configuration. 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
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 Corporation.
Please contact your local Sales
Engineer or call Tyco
Electronics Corporation.
Presentation—Example of New Current Rating Format
Dimensions are in inches and mil-
limeters unless otherwise specified.
Values in brackets are metric equiva-
lents.
Connector
From Figure 1, the base cur-
rent rating is 14 ampere with
18 AWG [0.8mm
Figure 2, the rating factor for
50% loading and 20 AWG
[0.6mm
The specific rating for this appli-
c a t i o n is the product of the
base rating and the rating factor:
Each of the contacts can
carry 9.5 ampere.
However, if the ambient tem-
perature 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:
M Series
M Series
Special
Type
12.8 x 0.68 = 8.7 a m p e r e .
14 x 0.68 = 9.5 ampere
2
] wire.
2
] wire is 0.68.
Type I
Type II
2
] wire.
High Current
Type II/III+
Graph shows the relationship between base current, ambient
temperature, and contact T-rise.
Rating factors allow the base current to be adjusted for various
connector loading and wire sizes.
Type III+
Specifications subject to change.
Type III+
Posted
Type XII
High Current
Type XII
Figure 1
Figure 2
Technical Support Center
1-800-522-6752
www.tycoelectronics.com
Mini-Coax
Sub-Mini
Coax
Catalog 82003
Revised 3-01