MODEL 68 1 3/8” Square Multiturn Cermet Trimming Potentiometer ELECTRICAL 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 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 85°C derating to 0 at 125°C 2 Ohms 20 900 Vrms 1,000 Megohms Essentially infinite 1% or 1 Ohm, whichever is greater ENVIRONMENTAL 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 85°C Fluorinert® (No Leaks) ±100ppm/°C –55°C to +125°C 5 cycles, –55°C to +125°C (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 125°C (2% ∆RT, 2% ∆VR) 200 cycles (3% ∆RT) 1,000 hours at 70°C (2% ∆RT) 260°C for 10 sec. (1% ∆RT) MECHANICAL Mechanical Stops Torque, Starting Maximum Weight, Nominal Clutch Action, both ends 5 oz.-in. (0.035 N-m) .04 oz. (1.13 grams) Fluorinert® is a registered trademark of 3M Company. Specifications subject to change without notice. 1-51 Model 68 TOP ADJUSTMENT (Inch/mm) .375 ± .015 9.53 ± 0.38 Model 68W .15 ± .02 3.8 ± 0.5 .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 .062 ± .015 1.58 ± 0.38 .060 ± .015 1.52 ± 0.38 .12 ± .02 3.1 ± 0.5 .375 ± .015 9.53 ± 0.38 .015 0.38 .020 ± .003 Dia. 0.51 ± 0.08 Terminal Pins (3) Standard Marking This Surface .18 Min. 4.6 (3) (2) (1) .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. .18 4.6 Min. Standoff Schematic Diagram This Surface (3) (2) Metal Adjustment Screw .090/2.29 Dia. With .020/0.51 Wide X .025/0.64 Min. Depth .015 ± .002 Min. 0.38 ± 0.05 .020 ± .003 Dia. 0.51 ± 0.08 Terminal Pins (3) .187 ± .015 4.75 ± 0.38 .375 ± .015 9.53 ± 0.38 .10 2.5 (3) (2) .12 ± .02 3.1 ± 0.5 (1) .19 ± .02 4.8 ± 0.5 .060 ± .015 1.524 ± 0.38 .10 2.5 1-52 .375 ± .015 9.53 ± 0.38 .187 ± .015 4.75 ± 0.38 (1) .03 Max. 0.8 Meniscus (Typ) .10 2.5 Standard Marking This Surface Model 68 SIDE ADJUSTMENT (Inch/mm) 1 Model 68X .375 ± .015 9.53 ± 0.38 .15 ± .02 3.8 ± 0.5 .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 .375 ± .015 9.53 ± 0.38 .32 ± .02 8.1 ± 0.5 .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 .10 2.5 .187 ± .015 4.75 ± 0.38 STANDARD RESISTANCE VALUES, OHMS 10 20 50 100 200 500 1K 2K 5K 10K 20K 25K 50K 100K 200K 250K 500K 1Meg 2Meg NOTES CIRCUIT DIAGRAM (2) (1) (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. INCH mm Tolerances unless otherwise specified: Linear = ± .01 inches (.25mm) Angular = ± 2 degrees CW 1-53 Model 68 PACKAGING Standard: Boxes Capacity Option: 100 Units (68W) 50 Units (All other styles) Tubes All units oriented with #1 pin to same side. Pin Style Magazine Width Height Length Capacity Option: = = = = = = 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 Tape & Reel, Ammo Pack (Available only for 68W and 68X) All units oriented with #1 pin to the right of the direction of feed. Tape Reel Ammo Seat Plane to Centerline of Sprocket Hole Width Sprocket Capacity Diameter Tape Fold Box = = = = = = = .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: 68 P R 10K LF Model Series RoHS Compliant Product Code - Optional Resistance Value Resistance Prefix Pin Style Option: 68 W R 10K LF TB Pin Style Packaging Option: TB = Tubes (Pin styles P, W, X) 68 W F R 10K LF TR Option: 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.) 1-54 Packaging Option: AP = Ammo pack TR = Tape & Reel (Pin styles W, X only) Model 68