Model 140, 142 Vishay Spectrol 1/2 (12.7mm) Single - Turn Wirewound Precision Potentiometer FEATURES 50 to 20K Bushing or Servo Model 142 Model 140 Servo Mount Bushing Mount ELECTRICAL SPECIFICATIONS PARAMETER STANDARD Total Resistance 50 to 20K Tolerance 5% Absolute Minimum Resistance Linearity x Total Resistance or 0.5 , whichever is greater Linearity (Independent) 1.0% Noise 100 ENR Power Rating 2 watts at 40C ambient derating linearly to zero at 125C Insulation Resistance 1,000M min. 0.500VDC Dielectric Strength 1.000V , 60 Hz RMS Rotation 140 142 320 5 350 + 0 - 4 End Voltage Linearity x total applied voltage for total resistance above 20 2.0% of total applied voltage for 20 and below MATERIAL SPECIFICATIONS ENVIRONMENTAL SPECIFICATIONS Shaft Stainless steel, non magnetic Vibration 20G thru 2000 Hz non-passivated Shock 50g Housing Aluminum, anodized Salt Spray 96 Hours Rear Lid Molded glass filled thermoset plastic Rotational Life 500,000 Terminals Brass, gold plated Shaft Revolutions Mounting Hardware (Model 140 only) Load Life 900 Hours Lockwasher Internal Tooth: Steel, nickel plated. Panel nut: Brass, nickel plated Temperature Range - 55C to + 125C (operating) ORDERING INFORMATION This part number consists of four groups of digits. The first group is the Spectrol model number. The second digit describes the mechani- cal options available. The third digit describes the other optional features which can be supplied. The fourth group is the standard EIA resistance code. Example: 140 - 0 - 0 - 203 140 0 0 203 MODEL MECHANICAL OPTIONS OTHER OPTIONAL RESISTANCE CODE FEATURES Bushing 140 0. Stops, Slotted Shaft (std) 0. Standard Torque 2 = First Significant figure 1. Plain Shaft 1. Center Tap (10K max. Rt) 0 = Second significant figure 2. Shaft Lock 2. High Torque 3 = Number of zeros following 3. Continuous Rotation 3. Sealed Construction 4. Combination 1 & 2 4. Combination 1 & 2 5. Combination 1 & 3 5. Combination 1 & 3 6. Combination 2 & 3 6. Combination 2 & 3 7. Combination 1, 2, & 3 7. Combination 1, 2, & 3 Servo 142 0. Continuous Rotation, 0. Standard Torque Same as above Plain Shaft (std.) 1. Center Tap (10K max. Rt) Example: Part number 140-0-0-203 describes bushing mount 140 with stops, slotted shaft, standard torque and resistance of 20K Document Number: 57039 For technical questions, contact sfer vishay.com www.vishay.com Revision 16-Jul-03 55Model 140, 142 Vishay Spectrol 1/2 (12.7mm) Single - Turn Wirewound Precision Potentiometer DIMENSIONS in inches (millimeters) + 0.0000 0.250 MTG 0.062 WIDE - 0.0003 0.500 (6.10) IMPERFECT + 0.000 0.1248 (12.70) THRO AREA 1/4 - 32 UNEF - 2A - 0.003 (3.17) THREAD 120 TYP 0.133 R (3.38) 0.500 (12.70) 0.187 CW (4.75) 0.056 0.152 0.031 0.015 INTEGRAL SHAFT LOCK (1.42) 0.218 (3.86) (0.79) 0.312 0.031 0.305 0.062 (0.79) (7.92) 0.010 (7.75) (1.57) 0.700 (17.78) MTG FACE BUSHING MOUNT 0.375 0.500 (9.52) (12.70) 150 0.0005 0.062 0.4370 MTG + 0.010 (1.57) + 0.000 0.500 TOLERANCES: UNLESS (11.10) - 0.0003 0.152 0.062 (1.57) (12.70) OTHERWISE NOTED, 0.1248 (3.86) 0.062 (1.57) 0.625 (3.17) DECIMALS 0.005, ANGLES 2 60 (15.88) MTG FACE CENTER TAP AVAILABLE AS SERVO MOUNT SPEC STANDARD FEATURE MECHANICAL SPECIFICATIONS PARAMETER Rotation 140 142 330 5 360 continuous Bearing Type SLEEVE BEARING BALL BEARING Torque (Maximums) Starting 0.2 oz - in (14.40gm - cm) 0.075 oz - in (5.40gm - cm) Running 0.2 oz - in (14.40gm - cm) 0.05 oz - in (3.60gm - cm) Traversing Dead Zone Not applicable 0.20 oz - in (14.40gm - cm) Weight 0.1 oz. maximum (2.84gm) 0.3 oz (8.50gm) maximum Stop Strength 5 in - lbs (5.76 kgm - cm) static (140 only) Runouts (Maximum) 140 142 Shaft (TIR) 0.002 in (0.05cm) 0.002 in (0.05cm) Pilot Dia (TIR) 0.002 in (0.05cm) 0.002 in (0.05cm) Lateral (TIR) 0.003 in (0.08cm) 0.002 in (0.05cm) Shaft End Play 0.006 in (0.15cm) 0.004 in (0.10cm) Shaft Radial Play 0.003 in (0.08cm) 0.002 in (0.05cm) POWER RATING CHART RESISTANCE ELEMENT DATA MAXIMUM MAXIMUM STD CURRENT VOLTAGE WIRE 2 RESISTANCE RESO- OHMS AT 40C ACROSS TEMP. VALUES LUTION PER AMBIENT COIL COEF. ( ) (%) TURN (mA) (V) (ppm/C) 1 50 0.542 0.271 200.0 10.0 20 100 0.431 0.431 141.0 14.1 20 200 0.361 0.722 100.0 20.0 20 0 0 20 40 60 80 100 120 140 160 500 0.312 1.56 63.2 31.6 20 AMBIENT TEMPERATURE IN (C) 1K 0.255 2.55 44.7 44.7 20 MARKING 2K 0.197 3.94 31.6 63.2 20 Unit Units shall be marked with manufacturers 5K 0.170 8.50 20.0 100.0 20 Identification name, model number, resistance value & 10K 0.147 14.7 14.1 141.0 20 tolerance, circuit diagram, terminal 20K 0.105 21.0 10.0 200.0 20 identification, linearity & date code www.vishay.com For technical questions, contact sfer vishay.com Document Number: 57039 56 Revision 16-Jul-03 RATED POWER IN (WATTS)