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.

Typical DIGI-KLIP® Contact Styles

Hertzian 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.
