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GbX®
Frequently Asked Questions
Electrical
What is the
current rating of the signal pins?
1 amp per contact
What is
the current rating of the power pins?
6 amps per contact
What is the
current rating of the shields?
1 amp per contact
Mechanical
What is the
per-pin insertion / mating force?
40 Grams nominal per contact (+20 -10)
What is the
normal force per signal contact?
60 Grams nominal, 40 Grams EOL (end of life)
What mating
forces should I expect with the 4-pair?
Approximately 25 lbs per 25 position connector
What kind
of complaint press-in forces should I expect with the 4-pair?
3.5 - 6 lbs per pin
How much wipe under
load do I get with the GbX connector?
Signal 3.0mm (5.55 contact), 2.0mm (4.55 contact), 1.0mm(3.55
contact) minimum, shield 3.8mm minimum
How long
can my daughtercard connector assembly be before I need to
split it and use a joiner module?
Up to 304mm (12 inches) long
Do I have to use
end-caps or guide pins in my configuration?
End caps must be used in a connector pattern that does not
have power or guide modules at the ends. This is done in order
to cover up the exposed metal on the wafer and protect the
end wafers. Guide pins are strongly recommended at both ends,
with a design guideline of one guide module minimum for assemblies
under 150mm (six inches) long, and two guide modules for assemblies
150mm and greater. For daughtercards weighing 8lbs or greater
please contact our applications engineers.
The daughtercard
connector is press-fit. Do I still need screws through my
daughtercard?
Yes, for joiners, guide modules and end modules
The connector
does not look symmetrical. Do I need special right-hand and
left-hand polarizing/guidance modules on the backplane?
Yes. There are right-hand and left-hand polarizing/guidance
modules.
What is the minimum
card-slot pitch for the GbX connector?
5-pair 1.25" minimum (30mm)
4-pair 1.00" minimum (24.7mm)
3-pair .80" minimum (20mm)
How long are the
press-fit tails?
2.28 millimeters
What are
the minimum and maximum printed board thicknesses required
for the GbX connectors?
1.60mm minimum thickness. There is no stated maximum since
the board fabricator is restricted by the manufacturing aspect
ratio for the daughterboard & backplane.
Assembly
Where do I
find information on the assembly and reworking tooling available
for the GbX connector?
It's listed on the GbX website under the Tooling/Repair
section. The Teradyne backplane assembly tooling was designed
concurrently with the GbX connectors. We strongly recommend
that you use this tooling because it has been tested and verified
to provide the proper orientation, sequencing and engagement
with the backplane module.
What is
the maximum insertion force required for my connector?
The maximum insertion force varies by configuration, but the
maximum insertion force per compliant pin for both the GbX
daughtercard and backplane connectors is 10 pounds.
Are there any
special press requirements?
Yes, in certain larger connector configurations into certain
board finishes. More information can be found in the technical
bulletin (TB-2094) which is located in the Technical
Bulletin section of the GbX web page. For further information
you may also contact your local field
applications engineer.
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