MODEL 89 1 3/4 Rectangular Multiturn Cermet Trimming Potentiometer ELECTRICAL Standard Resistance Range, Ohms 10 to 2Meg Standard Resistance Tolerance 10% (<100 Ohms = 20%) Input Voltage, Maximum 200 Vdc or rms not to exceed power rating Slider Current, Maximum 100mA or within rated power, whichever is less Power Rating, Watts 0.75 at 85C derating to 0 at 125C End Resistance, Maximum 2 Ohms Actual Electrical Travel, Turns, Nominal 20 Dielectric Strength 1,000 Vrms Insulation Resistance, Minimum 1,000 Megohms Resolution Essentially infinite Contact Resistance Variation, Maximum 1% or 1 Ohm, whichever is greater ENVIRONMENTAL Seal 85C Fluorinert (No Leaks) Temperature Coefficient, Maximum 100ppm/C Operating Temperature Range 55C to +125C Thermal Shock 5 cycles, 55C to +125C (1% RT, 1% VR) Moisture Resistance Ten 24 hour cycles (1% RT, IR 100 Megohms Min.) Shock, 6ms Sawtooth 100Gs (1% RT, 1% VR) Vibration 20Gs, 10 to 2,000 Hz (1% RT, 1% VR) High Temperature Exposure 250 hours at 125C (2% RT, 2% VR) Rotational Life 200 cycles (3% RT) Load Life at 0.75 Watts 1,000 hours at 70C (2% RT) Resistance to Solder Heat 260C for 10 sec. (1% RT) MECHANICAL Mechanical Stops Clutch Action, both ends Torque, Starting Maximum 5 oz.-in. (0.035 N-m) Weight, Nominal .05 oz. (1.4 grams) Fluorinert is a registered trademark of 3M Company. Specifications subject to change without notice. Model 89 1-77LOW PROFILE (Inch/mm) Model 89P and 90P .093 .01 Metal Adjustment Screw: Dia. With 2.36 0.25 .025 .005 .031 .005 Model No. And Wide X Deep Slot 0.635 0.127 0.787 0.127 Resistance Value Marked On This Or Opposite .19 .75 .060 .015 Surface 4.83 C 19.05 1.524 0.381 L .25 Solderable .175 6.35 Min. Terminal Pins (3) 4.445 .185 .015 (1) (2) (3) 4.669 0.381 .015 .005 0.381 0.254 .021 .003 Dia20 .050 .015 0.533 0.076 Typ. 5.08 .015 .50 .125 .015 1.270 0.381 .10 0.381 12.70 3.175 0.381 2.54 Standoff 2 Places Model 89P dimensions applicable to all other models except as noted. Model 89W (1) (2) (3) .100 .015 .20 2.540 0.381 .20 5.08 5.08 .50 .125 .015 12.70 3.175 0.381 Model 89X (1) (2) (3) .30 0.25 .050 .015 7.62 0.635 1.270 0.381 .10 .70 2.54 17.78 Model 89 1-78