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