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参数资料
型号： 207378-6
厂商： Tyco Electronics
元件分类： 输入/输出连接器
英文描述： 5mm (.197") Centerline, 600 V, 14 A max. (Metrimate)
中文描述： Metrimate连接器
文件页数： 34/64页
文件大小： 5860K
代理商： 207378-6
AMP Metrimate
Pin and Socket Connectors
4
Catalog 82045
Dimensions are in millimeters
Dimensions are shown for
USA: 1-800-522-6752
South America: 55-11-3611-1514
Revised 06-08
and inches unless otherwise
reference purposes only.
Canada: 1-905-470-4425
Hong Kong: 852-2735-1628
specified. Values in brackets are
Specifications subject
Mexico: 01-800-733-8926
Japan: 81-44-844-8013
www.tycoelectronics.com
equivalent U.S. Customary Units.
to change.
C. America: 52-55-5-729-0425
UK: 44-141-810-8967
NOTE: All part numbers
are RoHS Compliant
Can a contact rated at
10 amperes carry 10 amperes?
Maybe yes, but probably not.
The reason lies in the test
conditions used to rate the
contact. If these conditions do
not adequately reflect the
application conditions, the
actual allowable current lev-
els may be lower than speci-
fied levels. For example,
many manufacturers, includ-
ing Tyco Electronics, test a
single contact in air. This
gives an accurate measure of
the basic current-carrying
capacity of the contact. Use
the contact alone in air and it
can certainly carry 10
amperes. Use it in a multi-
position connector sur-
rounded by other
current-carrying contacts or
in high ambient tempera-
tures, and the contact should
carry less current.
Similarly, as the contact ages
and stress relaxation, environ-
mental cycling, and other
degradation factors take their
toll, the contact's current-car-
rying capacity decreases. A
prudent design must set cur-
rent levels for such end-of-
design-life (EODL)
conditions.
Practical current-carrying
capacity is not an absolute,
but an application-dependent
condition.
New Method Simplifies
Ratings
To help the designer set the
appropriate current level,
Tyco Electronics has devel-
oped a method of specifying
current-carrying capacity.
This method takes into
account the various applica-
tion factors that influence
current rating.
The method can be
summarized as follows:
The contact is aged to
EODL conditions by dura-
bility cycling, thermal
cycling, and environmental
exposure.
The contact's resistance
stability is verified.
The current necessary to
produce the specified tem-
perature rise is measured.
This T-rise is usually 30
°C.
A rating factor is deter-
mined to allow derating of
multiple contacts in the
same housing and for dif-
ferent conductor sizes.
Temperature
One other factor influencing
current levels is the maximum
operating temperature, for
example, 105
°C. If the appli-
cation has a high ambient
temperature (over 75
°C) the
contact's T-rise is limited by
the maximum operating tem-
perature. For example, an
application temperature of
90
°C limits the contact T-rise
to 15
°C. Since current pro-
duces heat (the I2R law), the
current must be lowered to
limit the T-rise.
A contact's T-rise depends
not only on its I2R Joule heat-
ing, but also on its ability to
dissipate the heat. Consider a
contact in a multi-contact
housing. Joule heating in
multiple contacts will raise
the local ambient tempera-
ture. Since the contact will
not be able to dissipate its
own heat as well by convec-
tion, the maximum
T-rise will be realized at a
lower current level. Conse-
quently, the allowable current
level must be lower to main-
tain an acceptable T-rise.
For a given connector, the
current level will be set by
the loading density. A con-
nector containing 50% cur-
rent-carrying contacts will
permit higher currents (per
contact) than a connector
will at 75% loading. The load-
ing percentage assumes an
even distribution of contacts
within the housing. If all 10
contacts are grouped
together in one section of a
20-position connector, the
loading density may
approach 100%.
The Importance of EODL
As stated, T-rise in a contact
depends on both resistance
and current. As it ages, a
contact's resistance will
increase. The contact
designer will specify a maxi-
mum resistance for the con-
tact, this level is the
end-of-design-life resistance.
Before the contact is tested
for current, Tyco Electronics
subjects it to a sequence of
tests that exercise many
major failure mechanisms and
thereby simulates EODL con-
ditions. Conditioning includes
mating cycling, industrial
mixed-flowing gases, humid-
ity and temperature cycling,
and vibration to sequentially
introduce wear, corrosion,
stress relaxation, and
mechanical disturbance.
Presentation
The presentation of current-
carrying capacity in Tyco
Electronics product specifica-
tions includes two parts:
First, a base curve showing
current levels versus T-rise
for a single circuit and the
largest wire size. This rep-
resents the maximum cur-
rent capacity of the
Current Rating
Verification
Performance Characteristics (Continued)
P
erf
ormanc
e
Char
act
eris
tics
相关PDF资料
PDF描述
207378-7 5mm (.197") Centerline, 600 V, 14 A max. (Metrimate)
207396-1 5mm (.197") Centerline, 600 V, 14 A max. (Metrimate)
207397-1 5mm (.197") Centerline, 600 V, 14 A max. (Metrimate)
207398-6 5mm (.197") Centerline, 600 V, 14 A max. (Metrimate)
207398-7 5mm (.197") Centerline, 600 V, 14 A max. (Metrimate)
相关代理商/技术参数
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