MODEL 91 1 3/8 Diameter Single Turn Cermet Trimming Potentiometer ELECTRICAL Standard Resistance Range, Ohms 10 to 2Meg Standard Resistance Tolerance 20% Input Voltage, Maximum 250 Vdc or rms not to exceed power rating Slider Current, Maximum 100mA or within rated power, whichever is less Power Rating, Watts 0.5 at 70C derating to 0 at 125C End Resistance, Maximum 2 Ohms Actual Electrical Travel, Nominal 174 Dielectric Strength 500 Vrms Insulation Resistance, Minimum 1,000 Megohms Resolution Essentially infinite Contact Resistance Variation, Maximum 1% or 1 Ohm, whichever is greater ENVIRONMENTAL 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 0.5 Watts 1,000 hours at 70C (2% RT) Resistance to Solder Heat 260C for 10 sec. (1% RT) MECHANICAL Mechanical Stops Solid Stop Strength 12 oz.-in. (0.085 N-m) Torque, Starting Maximum 5oz.-in. (0.042 N-m) Weight, Nominal .03 oz. (0.85 grams) Specifications subject to change without notice. Model 91 1-83TOP ADJUSTMENT (Inch/mm) Model 91A .375 Arrow Indicates Slider Position. Electrical Adjustments 9.525 .20 May Be Made With A Phillips Or Blade Screwdriver And Is Fingertip Adjustable. Max. Dia. 5.08 .034 .050 Slot: Wide X Deep 0.864 1.270 .385 9.779 For Blade .15 For Phillips Max. Screwdriver Model Number .20 3.81 Screwdriver Marked On This Surface 5.08 .20 .18 Min. 4.57 5.08 Resistance Value (2) Standoffs (2) (3) (1) Marked On This Surface .10 .020 .005 Dia. 2.54 0.508 0.127 .20 .10 Solderable 5.08 2.54 Terminals Model 91B .25 6.35 Max18 4.57 (3) (1) Min. (2) .10 .10 2.54 2.54 .20 5.08 .25 Model 91C 6.35 Max18 4.57 .156 Min. 3.962 (3) (1) (2) .172 .10 4.369 .344 2.54 8.738 .18 Model 91E Min. 4.57 .25 6.35 (2) Max20 5.08 .40 10.2 (3) (1) .10 .015 .005 2.54 0.381 0.127 .20 True Radius (Typ.) 5.08 Model 91 1-84