MODEL 44 1 4mm Square Multiturn Surface Mount Cermet Trimming Potentiometer ELECTRICAL Standard Resistance Range, Ohms 10 to 2Meg Standard Resistance Tolerance 10% (<100 Ohms = 20%) Input Voltage, Maximum 300 Vdc or rms not to exceed power rating Slider Current, Maximum 100mA or within rated power, whichever is less Power Rating, Watts 0.25 at 85C derating to 0 at 150C End Resistance, Maximum 1% or 2 Ohms, whichever is greater Actual Electrical Travel, Turns, Nominal 9 Dielectric Strength 600Vrms Insulation Resistance, Minimum 1,000 Megohms Resolution Essentially infinite Contact Resistance Variation, Maximum 1% or 3 Ohms, whichever is greater ENVIRONMENTAL Seal 85C Fluorinert (No Leaks) Temperature Coefficient, Maximum 100ppm/C (<100 Ohms = 250ppm/C) Operating Temperature Range 65C to +150C Thermal Shock 5 cycles, 65C to +150C (2% RT, 1% VR) Moisture Resistance Ten 24 hour cycles (2% RT, IR 10 Megohms Min.) Shock, 6ms Sawtooth 100Gs (1% RT, 1% VR) Vibration 20Gs, 10 to 2,000 Hz (1% RT, 1% VR) Rotational Life 200 cycles (3% RT, 1% CRV) Load Life at 0.25 Watts 1,000 hours at 85C (2% RT, 1% CRV) Resistance to Solder Heat 260C for 10 sec. (1% RT) Temperature Exposure, Maximum 215C for 3 min. (1% RT) Solderability Per MIL-STD-202, Method 208 MECHANICAL Mechanical Stops Clutch action, both ends Torque, Starting Maximum 3 oz.-in. (0.021 N-m) Weight, Nominal .01 oz. (0.3 grams) Fluorinert is a registered trademark of 3M Company. Specifications subject to change without notice. Model 44 1-21TOP ADJUSTMENT (Inch/mm) SIDE ADJUSTMENT (Inch/mm) Model 44W Model 44J .008.003 Solderable Solderable .008.003 3X 3X .203.076 Terminals .203.076 Terminals (1) .025 .025 .100 3X 3X (1) .63 .63 2.54 (2) .190 .190 4.83 4.83 (2) .100 (3) .061 2.54 .061 .113 .113 1.56 .200 (3) 1.56 2.87 2.87 5.08 Metal Adjustment Metal Adjustment .198 .209 Screw .056/1.42 Dia. Screw .056/1.42 Dia. 5.03 5.31 with .020/.51 wide x .022 with .020/.51 wide x .180 .015/.38 deep slot .55 .015/.38 deep slot 4.57 .138 .147 3.51 .154 3.73 3.91 .063 .039 .032 3X 3X 1.60 .99 .81 SOLDER PAD LAYOUT (Inch/mm) Model 44G .051 .114 2X 1.30 .079 2.90 2.01 (1) .025 3X .63 Model 44W .100 .190 .100 .060 3X 2.54 4.83 1.52 2.54 (2) .061 .157 .120 (3) 1.56 3.99 3.05 .079 3X 2.01 Metal Adjustment .229 Screw .056/1.42 Dia. 5.82 Model 44J with .020/.51 wide x .180 .090 .015/.38 deep slot .079 4.57 2.01 .051 2.29 2X 1.30 .154 .205 3.91 5.21 .051 3X 1.30 .008.003 .024 3X .203.076 .61 Solderable .079 .090 Terminals Model 44G .051 2.29 2.01 2X 1.30 STANDARD RESISTANCE VALUES, OHMS 10 100 1K 10K 50K 250K 2Meg 20 200 2K 20K 100K 500K 50 500 5K 25K 200K 1Meg Model 44 1-22