CONTACT STYLE CHOICES
All DIGI-KLIP® free-standing
card edge contacts are designed for use in “board-to-board” interconnect
applications. There are four series from which to choose, and all of them
are provided pre-loaded on disposable injection molded carrier strips for
mass mounting, alignment and soldering.
SRP SERIES:
standard single row applications; for 0.062" daughter card mating; available
in increments of 0.100", 0.150" and 0.156".
DRP SERIES:
standard dual row applications; for 0.062" daughter card mating; available
in increments of 0.100", 0.150" and 0.156".
SMA SERIES:
micro-miniature single row applications; for 0.062" daughter card mating;
available in increments of 0.050" and 0.100".
SMP SERIES:
micro-miniature single row applications; for 0.031" daughter card mating;
available in increments of 0.050" and 0.100"
Performance Specifications for High-Speed Applications
The following parameters are expressed for the SRP series DIGI-KLIP®
contact as a typical example of the performance of these products in high
speed digital switching environments.
Hertizan Stress
This calculation, expressed in thousands of pounds per
square inch, has come to be recognized as a more valid predictor of reliability
than normal force for demanding interconnect applications. Hertzian stress
is a formula which incorporates normal force with such factors as actual contact
surface area, mating component geometries and the modulus of elasticity of
surface finishes. A minimum Hertzian stress value of 250 Kpsi has been established
for prediction of long term reliability in a single contact design.
Performance Values Comparison
Three significant measurements can strongly affect the
performance of an interconnect system in today's high speed/low level switching
applications. These are: adjacent contact capacitance, inductance and propagation
delay (contact rise time). The chart depicted below shows a comparison of
these values between an SRP series contact and several other popular card
edge contact profiles.
