ZIF III CIRCUIT BOARD RETAINERS GENERAL DESCRIPTION DESIGN FEATURES ZIF III retainers are the latest in the state-of-the-art PC board mountable retainers. Unlike other designs on the market, CTS’s ZIF III features a quick, quarter-turn locking mechanism that provides for a positive and fast assembly. Its unique locking design produces a uniform pressure distribution along the PCB edge for the absolute best heat transfer and resistance to extreme shock and vibration. It will not warp your circuit boards unlike some others available in the market. If you have high density PC board mounting applications for military, space, medical, industrial controls, computers and communications, you need ZIF III Circuit Board Retainers. ■ PC BOARD MOUNTABLE ■ POSITIVE 1/4 TURN LOCKING ■ FIELD MAINTAINABLE ■ QUICK AND EASY INSTALLATION ■ SUPERIOR MECHANICAL RETENTION ■ THERMALLY EFFICIENT, 0.9 °C-INCH/WATT COLD PLATE RECOMMENDED GAP: PC BOARD THICKNESS +0.300” TOTAL COMBINED TOLERANCE FOR PCB AND COLD PLATE: ±0.007” THERMAL IMPEDANCE IS 0.9 °C-IN/WATT 1/4 TURN LOCKING NO TORQUE WRENCH REQUIRED PULL OUT FORCE IS 210 LBS FOR A PAIR OF 6 INCH RETAINERS PC BOARD WITH ZIF III RETAINER U.S. Patent No. 5,200,882 14 ORDERING INFORMATION Z 3 A 3 7 S B - 3 - B N L ZIF III DESIGNATION R=Right Hand Part L=Left Hand Part TOP ASSEMBLY OPTION A=Assembled B=Kit SPRING FINISH U=Unplated B=Black Cadmium N=Nickel LENGTH OF HOUSING ASSEMBLY 15=1.50 Inch 22=2.25 Inch 30=3.00 Inch 37=3.75 Inch 45=4.50 Inch 52=5.25 Inch 60=6.00 Inch 67=6.75 Inch 75=7.50 Inch SPRING MATERIAL B=Be Cu ROD TYPE 1=Pin Drive, Aluminum Rod 4.5” Max. 2=Pin Drive, Stainless Steel 3=Slot Drive, Stainless Steel 3.75” Max. 7=3/16 Hex Drive, Stainless Steel S=Type 7 With Painted Indicator Z=1/8” Socket Head Cap, Stainless Steel Rod MOUNTING TYPE S=Screw Mounting (2-56) B=No Holes I=2-56 Helical Insert (Locking) M=Screw Mounting (M3x.05) HOUSING FINISH B=Black Anodize U=Unplated R=Chemical Film SPECIFICATIONS .3125” 7.938mm MOUNTING TYPE .220” 5.558mm 3/16” HEX HEAD .181” 4.597mm .125” 3.175mm .125” ALLEN WRENCH INDICATOR SLOT .250” 6.35mm B PIN DRIVE TYPE 1 & 2 (A) C .250” 6.35mm .12” 3.048mm SCREWDRIVER SLOT TYPE 3 .250” 6.35mm HEX HEAD DRIVE TYPE 7 & S ROD STYLES .150” 3.81mm THERMAL IMPEDANCE BETWEEN PC BOARD AND COLD PLATE IS 1.2 °C IN/WATT 2 PL A ROD (IN UNLOCKED POSITION) TO LOCK TURN ROD 90° CCW (ROD HEX HEAD NOT SHOWN FOR CLARITY) A .15” 3.81mm .32” 8.128mm MAX. SCREW ENGAGEMENT .087 .15” 3.81mm HOUSING ROD SPRING .250” 6.35mm SECTION A—A TOTAL WEIGHT PER ASSEMBLY: ALUMINUM ROD 3.42 GRAM/IN. STAINLESS STEEL 5.23 GRAM/IN. BSC BSC ADIM BDIM C DIM 1.500” 38.10mm 2.250” 57.15mm 3.000” 76.20mm 3.750” 95.25mm 4.500” 114.30mm 5.250” 133.35mm 6.000” 152.40mm 6.750” 171.45mm 7.500” 190.50mm — — — — — — — — — — — — 2.875” 7.03mm 3.250” 82.55mm 3.625 92.08mm 1.250” 31.75mm 2.000” 50.80mm 2.750” 69.85mm 3.500” 88.90mm 4.250” 107.95mm 5.000” 127.00mm 5.750” 146.05mm 6.500” 165.10mm 7.250” 184.15mm BOARD THK. .180” 4.572mm 2 PL BOARD THK. + .300±.007” 7.62±.178mm COLD PLATE LEFT HAND PART LOCK UNLOCK 3/16” SOCKET WRENCH WITH .300 DIA. (IF NECESSARY, MODIFY COLD PLATE TO CLEAR SOCKET WRENCH HEAD ROD (IN LOCKED POSITION) RIGHT HAND PART LOCK UNLOCK Dimensions are for reference use only. Contact CTS for dimensions with tolerances or standard part drawings. All dimensions are in inches unless otherwise noted. 15