Datasheet
ENGINEERING & GENERAL NOTES
ENGINEERING
NOTES
Plastic Moulding Ma
te
rials
Edac offers a wide range of insulator materials
Inclu
d
ing
polyester, diallyl phthalate,
po
lyphenylene sulphide,
polycarbonate and nylon.
Card
guides
are
moulded
in
polyester or polycarbonate
and
polarizing
keys
are
moulded
in
nylon. If a specific material
is
required
to suit your
application, please cohsUitwith
Edac.
All
of
the
moulding materials
used
by Edac
have
excellent
mechanical, electrical
and
thermal
properties.
Some
of
the
notable differences
between
the
ma
terial characteristics
are
as
follows:
1)
Diallyl phthalate
is
a thermoset material.
All
other
materials
used
are
thermoplastics.
2)
Polypheny'l
ene
sulphide and diallyl phthalate are
capable
or
being
used
in
vapour
phase
or lnfra,
red
soldering
applicaijons
up
to
260
degc.
Frequen
tly
these
materials
ate a
lso
used
in
bum-
in
applications
up
to
150
degrees
Ce
l
sius.
3)
In
general, chemical resistance Is excellent
for
all
of the
materials, except polycarbonate. With polycarbonate,
chemica
ls
such
as
amines, aromatic or halogenated
hydrocarbons, esters
and
ketones should be avoided.
4)
The flammability
rating
is UL
94V-O
for
all materials,
except
for
polycarbonate
which
is
rated at
UL
94V-2
and
nylon which
is
rated at UL 94HB.
Contact Materials
Contact
base
materials
are
either phosphor bronze alloy
CA-51
0
or
copper, nickel,
tin
alloy
CA-725.
These materials
have
been
widely
used
and
accepted
in
the electronics
industry
for
many
years.
They
offer
an
excellent
blend
of
electrical, mechanical
and
corrosion resistance character-
istics
at
a reasonable. cost.
Contact Finish (Plating &
Go
ld Inlay)
The
stahdard contact finishes offered include:
1)
Selective plating-nickel overall followed
by
gold
on
the
contact
mating
area
and
tin alloy
on
the
contact tails
2)
Overall plating - gold over nickel or tin alloy
3)
Gold
alloy inlay - Western Electric alloy
#1
(69%
gold
,
25%
silver
and
6%
palladium) over nickel
on
the malfng
area
and
unplated CA-725 tails
With
this manufacturing flexibility, Edac
can
also
provide
contact finishes to
meet specific requirements.
Examples
of special platings regularly performed include various
plating thicknesses
and
selectively plated gold
on
both
the
mating
area
and
the contact
tail
.
The
majority of
metal
hardware
such
as
threaded inserts,
bushings
and
actuating screws are nickel plated
brass
or
steel. Consult with Edac if specific details
are
required.
naerwn•
rs
waoo
1 r
...
Connectors
recogn
ized
by
UL
and
certHied
by
CSA
(as
indicated
on
the
ihdiv
idual
series
pages)
are
lfsted
uhder
UL
File No.
E62838
&
E215269
and
CSA
File
No.
LA
39927.
Consult with
Edac
if
additional
product
listings
are
required.
Diameters of wire sizes commonly
used
with Edac connec-
tors are summarized
below
.
The
actual strahded wire
diameter
is
dependant
upon
the number of strands
and
in
dividual strand
gau
"
ge.
Gauge
AWG
Diameter of
Solid Wire
Conductor
Diameter of
Stranded
Wire
Conductor
Phosphor bronze alloy
CA-51
0,
(Federal Specification
QQ-8-750,
Grade
A)
consists of 94.8% copper,
5%
tin
and
0.
2%
phosphorus.
18
Copper, nickel, t
in
alloy
CA-725,
(AS
TM
8-
122
, Copper
20
Alloy
UNS
No
.
C72500)
consists of 88.2% copper,
9.5%
22
nickel
and
2.3%
tin.
This material
has
the
added
benefit
of
24
remaining solderable
In
the unplated condition for
an
26
extended
period of time.
28
~
.0403 (1.024)
.
0320
(0.813)
.0253 (0.643)
.0201
(0.511)
.0159 (0.404)
.0
126
(0.320)
.0100 (0.254}
.047
to .
049
(1.19 to
1.24)
.
035
to .
038
(0.89
to
0.97)
.030
to .
031
{0.76
to
0.
79)
.0231o
.024 (0.58
to
0.6'1)
.019 to .
021
(0
.
48
to
0.53)
.015to
.016
(0.38to
0.4
1)
.012(0.30)
Page3
The
insulation diameter
will
vary depending
upon
the
application,
rating
and
material.