Data Sheet - ComDaC

Anderson Power Products®
Genderless Connector
Wiping action on mate and break
keeps conducting surfaces clean
Detent keeps connectors mated and provides
quick break snap action upon disconnect
Rugged lightweight
polycarbonate housing
If broken under load, arcing is confined to tip a non-conducting area
Low resistance silver or
tin-plated copper contacts
Stainless steel leaf spring provides constant contact pressure
Where Do Contacts Contact?
Although electrical contacts appear to have a large surface area,
only a small portion of that area actually touches the mating part,
because any metal surface — no matter how finely polished or
ground — is never perfectly flat or smooth.
What Makes A Good Connector?
The termination can make the difference between good and poor
connector continuity. This hypothetical example of “good” and
“poor” continuity shows how power loss can seriously impair the
efficiency of an EV. Important are two points of resistance:
Mating Surface
Mating summits or asperities
Peaks on
flat surface
The butt contact conducts
current via three or less
summits or high peaks
(asperities).
1. Rc, the central contact resistance.
2. Rw1 the resistance at two terminations.
A typical sliding connector carries 175A, but when the termination
resistance Rw, rises because of faulty design or assembly, total
resistance rises, too. (See table). Using the basic relationship for
DC power,
P= (I x R) (I) = I²R
Mating Cross Section
Asperities (individual mating spots)
The cylindrical contact,
although it appears to have a
large, ample area, actually
conducts current through no
more than three lines of
contact in this example.
The “good” conductor dissipates, or loses,
P = (175)² (0.00004) = 1.225W
The “poor” conductor loses,
P = (175)² (0.00202) = 61.8W
R w R c R w
Mating line
The sliding contact, when
spring loaded, conducts
current through an entire line
of contact.
Good vs. Poor Connection
Typical Joint R w R c R w R total
Good 0.000010 0.000020 0.000010 0.000040
Poor 0.001000 0.000020 0.001000 0.002020
HEADQUARTERS: 13 Pratts Junction Road, P.O. Box 579, Sterling, MA 01564 T:978-422-3600 F:978-422-3700
EUROPE: Rathealy Road, Fermoy Co. Cork, Ireland T:353-(0)25-32277 F:353-(0)25-32296
ASIA/PACIFIC: IDEAL Anderson Asia Pacific Ltd., Unit 922-928 Topsail Plaza, 11 On Sum Street, Shatin N.T., Hong Kong T:852-2636-0836 F:852-2635-9036
CHINA: IDEAL Anderson Technologies (Shenzhen) Ltd., Block A8 Tantou W. Ind. Par, Songgang Baoan District, Shenzhen, PR. China 51810 T: 86-755-2768-2118 F: 86-755-2768-2218
TAIWAN: IDEAL Anderson Asia Pacific Ltd., Taiwan Branch, 4F.-2, No.116, Dadun 20th St., Situn District, Taichung City 407, Taiwan (R.O.C.) T: 886-4-2310-6451 F:886-4-2310-6460
www.andersonpower.com
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