Board Retainer Configuration Part Number Series: ZIF

CTS
®
DESIGN FEATURES
QUICK LOCKING ACTION
UNIFORM HEAT TRANSFER
COMPLETE INTERCHANGEABILITY
VISUAL INDICATION OF LOCK/UNLOCK
GENERAL DESCRIPTION
TECHNICAL ASSISTANCE-CUSTOM DESIGNS
The ZIF retainer is a totally self-contained, precision
assembly that provides a highly effective thermal interface
between the circuit board and coldwall. Board lengths
between 1-1/2” and 12” can be accommodated.
A ZIF retainer consists of:
(1) an aluminum housing
(2) a rod/cam assembly constructed from an aluminum
or stainless steel double flat rod extrusion. The ZIF
rod assembly is driven by one of three options: pin,
hex-head or screwdriver slot
(3) a beryllium copper spring
ZIF retainers are mounted to any flat metal surface (coldwall).
The standard configuration is attached with 4-40 hardware.
However, the retainer housing can be supplied with tapped
holes for M3x.5 metric hardware, or left undrilled with only
index pins for vacuum brazing, dip brazing or epoxy bonding.
Our engineering staff has extensive experience in the
packaging of ZIF retainers. Modification of standard
housings, cams and spring configurations for special
design applications is frequently possible. We welcome the
opportunity of providing you with the assistance needed to
solve all of your thermal management problems.
SPECIFICATIONS
The ZIF cam detent design gives added assurance that a
PCB will remain securely locked in position even under
extreme vibration and shock levels. Detent action occurs
during the final 15 degrees of cam rotation and virtually
eliminates any possibility of the cam unlocking under
environmental stress.
ZIF OPERATION
To Lock
To Unlock
Housing
Cam Shaft
Unlocked,
ZeroInsertion
Force (ZIF)
Position
Locked, Maximum
Clamping Force
Position
Spring
Circuit Board or
Thermal Management
Frame
Coldwall or
Mounting Surface
(
)
3°C-inch
WATT
Clamping pressure is not only
essential to heat transfer, but
also a critical requirement for
retention of PCBs under severe
shock and vibration. ZIF retainers
have been subjected to the most
extreme test conditions specified
in MIL-STD-810C. Nominal
retention force for a circuit
board held captive by a pair of
ZIF retainers (I/O connector
excluded) is shown in the graph.
FOR MECHANICAL RETENTION
PER PAIR
RETENTION FORCE
Improving the thermal conductivity of circuit board retainers
enhances system performance
by increasing the reliability of
electronic components and circuit
modules. Extensive testing of
ZIF retainers in the CTS
Engineering Test Laboratory
demonstrates that they have
the best thermal performance
of any circuit board retainer
available.
11
CTS
®
ORDERING INFORMATION - STANDARD ZIF
Z A S 1 1 1 - 062 - 1 5
R* - B B U
ZIF Designation
Spring Plating
U=Unplated
B=Black Cadmium
N=Nickel
Assembly Option
A=Assembled K=Kit
Mounting Method
B=Brazed
S=Screws 4-40
M=Metric Screws (M3x0.5)
Housing Series
1=Without Pins
2=With .062x.040
Extended Aluminum Index Pins
Rod Assembly
1=Pin Drive, Aluminum Rod (6” Max.)
2=Pin Drive, Steel Rod
3=Slot Drive, Steel Rod (4.5” Max.)
4=1/4 Hex Drive, Aluminum Rod
7=3/16 Hex Drive, Steel Rod
S=3/16 Hex Drive, Steel Rod
Z=1/8” Socket Head Cap, Steel Rod
Rod Plating
B=Black Anod. Aluminum Rods
P=Passivated, Steel Rods
Housing Plating
B=Black Anodize
U=Unplated
R=Chem. Film
R=Right Hand Part
L=Left Hand Part
Assembly Length in .5” Increments x 2
Ex: 7.5”=15
*All assembled ZIFs must have a left or right designation.
Any kit with a 1/4 inch hexhead drive must have a left or right designation.
Spring Series
1=Current Design
Visual identification slot painted yellow.
Board Thickness (±.005 Max.)
.031”
.050”
.062”
.084”
ROD STYLES
.093”
.125”
.25”
6.3mm
B
C
Visual Identification Slot
.31”
7.9mm
A±.005
.25”
6.3mm
*.50”
12.7mm
SCREW MOUNTED
PARTS ONLY
Fig. 1
(Pin Drive)
.04”
9.1mm
.12”
3.2mm
3/16” HEX
.15”
3.8mm
Fig. 4
(3/16” Hexhead Drive)
TYPE 1 HOUSING
+.002
DIA. x
—.001
.125 MIN DEEP
(2 PLC ALL PARTS)
*.25”
6.3mm
.062”
*E
*F
Fig. 2
(Screwdriver Slot Drive)
.25”
6.3mm
1/8” INTERNAL
HEX W/ PAINTED
INDICATOR
.385±.010”
9.78±.25mm
*G
(LOCATING PIN HOLES)
*H
K REF
.25”
6.3mm
L MAX
*J
*TOLERANCE ±.005
.22”
5.6mm
1/4” HEX”
Fig. 5
(1/8” Socket Head Cap)
.20”
5.1mm
.175-.195”
4.45-4.95mm
BOARD INSERTION DEPTH
Fig. 3
(1/4” Hexhead Drive)
ROD TYPE
DESIG. FIG. NO. MATERIAL
.040”
1.02mm
ON TYPE 2
HOUSING ONLY
ZIF HOUSING DIMENSIONS
MAX. SPRING LENGTH
ZRA1
ZRA2
ZRA3
1
1
2
aluminum
steel
steel
6 inches
10.5 inches
4.5 inches
ZRA4
ZRA7
ZRAS
3
4
4
aluminum
steel
steel
10.5 inches
10.5 inches
10.5 inches
ZIF circuit board retainers BOARD
are available in several standard THICK
.031”
configurations. When ordering .79mm
standard ZIF assemblies, kits .050”
1.27mm
or individual components, .062”
please refer to the ZIF identi- 1.57mm
.084”
fication number guide shown 2.13mm
above. Custom ZIF retainers .093”
will be assigned special part 2.36mm
.125”
number identification.
3.17mm
K
REF
L
MAX
.094”
.400”
2.39mm
10.16mm
.075”
.400”
1.90mm
10.16mm
.063”
.400”
1.60mm
10.16mm
.063”
.422”
1.60mm
10.72mm
.079”
.447”
2.01mm
11.34mm
.082”
.478”
2.08mm
12.11mm
A
LENGTH
SPRING
DESIGNATION LENGTH ±.005
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
1.5
1.5
1.5
3
3
3
4.5
4.5
4.5
6
6
6
7.5
7.5
7.5
9
9
9
10.5
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.50
9.00
9.50
10.00
10.50
B
C
D
.75
1.00
1.25
.75
1.00
1.25
.75
1.00
1.25
.75
1.00
1.25
2.25
2.50
2.75
3.75
4.00
4.25
5.25
—
—
—
1.5
1.5
1.5
3.0
3.0
3.0
4.5
4.5
4.5
3.0
3.0
3.0
1.5
1.5
1.5
—
.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.50
9.00
9.50
All dimensions are in inches unless otherwise noted.
12
TYPE 2 HOUSING
.062 x .040”
1.57 x 1.02mm
EXTENDED ALUMINUM
INDEX PINS
4-40 MOUNTING HOLES NO. OF
E
F G H
J MNTG.HOLES
1.25 —
1.75 —
2.25 —
1.50 2.75
1.75 3.25
2.00 3.75
2.25 4.25
1.75 3.25
2.00 3.50
2.00 4.00
2.25 4.25
2.50 4.50
2.00 3.75
2.00 4.00
2.25 4.25
2.50 4.50
2.00 3.75
2.00 4.00
2.25 4.25
—
—
—
—
—
—
—
4.75
5.25
5.75
6.25
6.75
5.50
6.00
6.25
6.50
5.75
6.00
6.25
—
—
—
—
—
—
—
—
—
—
—
—
7.25
7.25
8.25
8.75
7.50
8.00
8.25
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
9.25
9.75
10.25
2
2
2
3
3
3
3
4
4
4
4
4
5
5
5
5
6
6
6
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