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MODEL 68 3/8" Square Multiturn Cermet Trimming Potentiometer ELECTRICAL 1 Standard Resistance Range, Ohms Standard Resistance Tolerance Input Voltage, Maximum Slider Current, Maximum Power Rating, Watts End Resistance, Maximum Actual Electrical Travel, Turns, Nominal Dielectric Strength Insulation Resistance, Minimum Resolution Contact Resistance Variation, Maximum ENVIRONMENTAL 10 to 2Meg 10% (<100 Ohms = 20%) 200 Vdc or rms not to exceed power rating 100mA or within rated power, whichever is less 0.5 at 85C derating to 0 at 125C 2 Ohms 20 900 Vrms 1,000 Megohms Essentially infinite 1% or 1 Ohm, whichever is greater Seal Temperature Coefficient, Maximum Temperature Range Thermal Shock Moisture Resistance Shock, 6ms Sawtooth Vibration High Temperature Exposure Rotational Life Load Life at 0.5 Watts Resistance to Solder Heat MECHANICAL 85C Fluorinert(R) (No Leaks) 100ppm/C -55C to +125C 5 cycles, -55C to +125C (1% RT, 1% VR) Ten 24 hour cycles (1% RT, IR 1,000 Megohms min.) 100G's (1% RT, 1% VR) 20G's, 10 to 2,000 Hz (1% RT, 1% VR) 250 hours at 125C (2% RT, 2% VR) 200 cycles (3% RT) 1,000 hours at 70C (2% RT) 260C for 10 sec. (1% RT) Mechanical Stops Torque, Starting Maximum Weight, Nominal Fluorinert(R) is a registered trademark of 3M Company. Specifications subject to change without notice. Clutch Action, both ends 5 oz.-in. (0.035 N-m) .04 oz. (1.13 grams) 1-51 Model 68 TOP ADJUSTMENT (Inch/mm) Model 68W .245 Max. 6.22 .375 .015 9.53 0.38 .15 .02 3.8 0.5 Schematic Diagram This Surface .062 .015 1.58 0.38 Metal Adjustment Screw .090/2.29 Dia. With .020/0.51 Wide X .025/0.64 Min. Depth .12 .02 3.1 0.5 .060 .015 1.52 0.38 .015 0.38 .375 .015 9.53 0.38 Standard Marking This Surface .18 Min. 4.6 (3) (2) (1) .020 .003 Dia. 0.51 0.08 Terminal Pins (3) .045 .015 1.14 0.38 .10 2.5 .10 2.5 .187 .015 4.75 0.38 SIDE ADJUSTMENT (Inch/mm) Model 68P .245 6.22 Max. Schematic Diagram This Surface .18 4.6 Min. Standoff (3) (2) Metal Adjustment Screw .090/2.29 Dia. With .020/0.51 Wide X .025/0.64 Min. Depth (1) .03 Max. 0.8 Meniscus (Typ) .060 .015 1.524 0.38 .10 2.5 .375 .015 9.53 0.38 (3) (2) .12 .02 3.1 0.5 (1) .10 2.5 .10 2.5 .015 .002 Min. 0.38 0.05 .187 .015 4.75 0.38 .020 .003 Dia. 0.51 0.08 Terminal Pins (3) .375 .015 9.53 0.38 .187 .015 4.75 0.38 Standard Marking This Surface .19 .02 4.8 0.5 1-52 Model 68 SIDE ADJUSTMENT (Inch/mm) 1 Model 68X .15 .02 3.8 0.5 .375 .015 9.53 0.38 .245 Max. 6.22 Metal Adjustment Screw .090/2.29 Dia. With .020/0.51 Wide X .025/0.64 Min. Depth Schematic Diagram This Surface Standard Marking This Surface .32 .02 8.1 0.5 .375 .015 9.53 0.38 .020 .003 Dia. 0.51 0.08 Terminal Pins (3) .18 Min. 4.6 (3) (2) (1) .060 .015 1.524 0.38 .045 .015 1.14 0.38 .10 2.5 .187 .015 4.75 0.38 .10 2.5 STANDARD RESISTANCE VALUES, OHMS 10 20 50 100 CIRCUIT DIAGRAM 200 500 1K 2K 5K 10K 20K 25K NOTES 50K 100K 200K 250K 500K 1Meg 2Meg (2) (1) CW (3) Metric equivalents, based on 1 inch = 25.4mm are rounded to the same number of significant figures as in the original English units and are provided for general information only. Tolerances unless otherwise specified: Linear = .01 inches (.25mm) Angular = 2 degrees INCH mm 1-53 Model 68 PACKAGING Standard: Boxes Capacity = = 100 Units (68W) 50 Units (All other styles) Option: Tubes All units oriented with #1 pin to same side. Pin Style Magazine Width Height Length Capacity P 0.57" 0.66" 20.9" 50 Units W 0.33" 0.90" 20.4" 50 Units X 0.33" 0.90" 24.4" 50 Units = = = = Option: Tape & Reel, Ammo Pack (Available only for 68W and 68X) All units oriented with #1 pin to the right of the direction of feed. Seat Plane to Centerline of Sprocket Hole Width Sprocket Capacity Diameter Tape Fold Box Tape Reel Ammo = = = = = = = .71" (18.03 mm) 18 mm Single Hole .50" spacing 1,000 Units 14" (356 mm) 12" (305 mm) 1.8" x 13" x 10" (46mm x 330mm x 254mm) ORDERING INFORMATION Standard: Model Series Pin Style Option: Pin Style 68 P R 10K LF RoHS Compliant Product Code - Optional Resistance Value Resistance Prefix 68 W R 10K LF TB Packaging Option: TB = Tubes (Pin styles P, W, X) 68 W F R 10K LF TR Pin Style Pin Style Suffix: (Used with AP and TR packaging options. Applicable to pin styles W & X only. "F" designates 0.70" lead length.) Packaging Option: AP = Ammo pack TR = Tape & Reel (Pin styles W, X only) Option: 1-54 Model 68 |
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