Model 138 www.vishay.com Vishay Spectrol 5 1 / (33.3 mm) Industrial Single Turn, 16 Bushing Mount, Conductive Plastic Potentiometer FEATURES Center tap available Continuous rotation and mechanical stops both standard Suitable model for all types of industrial QUICK REFERENCE DATA applications Sensor type ROTATIONAL, conductive plastic Material categorization: for definitions of compliance Output type Output by turrets please see www.vishay.com/doc 99912 Market appliance Industrial 5 Dimensions 1 / (33.3 mm) 16 ELECTRICAL SPECIFICATIONS PARAMETER MIL-PRF-39023 TEST PROCEDURES APPLY STANDARD SPECIAL Ohmic Value Range 1 k to 50 k 1 k to 50 k Tolerance 10 % 5 % Linearity (independent) STANDARD BEST PRACTICAL 0.5 % 0.25 % Output Smoothness 0.1 % maximum Power Rating 40 C ambient 2 W derated to zero at 125 C Electrical Angle Continuous 345 4 Stops 340 5 Insulation Resistance 1000 M minimum at 500 V DC Dielectric Strength 1000 V , 60 Hz RMS Absolute Minimum Resistance 1.0 % of total resistance Minimum Voltage 0.5 % maximum Temperature Coefficient of Resistance 600 ppm/C maximum MATERIAL SPECIFICATIONS ENVIRONMENTAL SPECIFICATIONS Housing Molded glass filled thermoplastic Vibration 15 g thru 2000 Hz Rear Lid Glass filled thermoset plastic Shock 50 g Shaft Stainless steel, non-magnetic Salt Spray 48 h Brass, plated for solderability, Rotational Life Terminals 2 million non-passivated Shaft Revolutions Mount Hardware Operating Temperature Range -55 C to +125 C Lockwasher Internal Tooth: Steel, nickel plated Note Panel nut: Brass, nickel plated Nothing stated herein shall be construed as a guarantee of quality or durability ORDERING INFORMATION 138 B 20502 XXXX MECHANICAL MODEL STYLE FEATURES VALUE SPECIAL REQUEST OPTIONS 138 B: bushing 0 = continuous 0 = standard 470 = 47 Custom reference 222 = 2.200 2 = stops 1 = center tap 103 = 10 k For ohmic value range see electrical specification Revision: 29-Nov-17 Document Number: 57033 1 For technical questions, contact: sferprecisionpot vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000 Model 138 www.vishay.com Vishay Spectrol PART NUMBER DESCRIPTION (for information only) 138- 2- 1- 502 xxxx MECHANICAL MODEL FEATURES OHMIC VALUE SPECIAL OPTIONS DIMENSIONS in inches (millimeters) 0.031 MODEL 138B/138-... 0.875 (22.22) 0.015 + 0.0000 0.625 - 0.0020 0.4062 MTG. (10.32) (15.88) 0.015 0.015 0.375 60 0.187 0.010 (9.52) 0.032 0.015 (4.75) (0.81) 0.500 + 0.0000 - 0.0003 0.062 (12.70) (1.57) 0.2497 (6.34) BC 0.030 MAX. (0.76) 0.562 (14.27) 0.015 1.312 (33.32) 0.032 (0.81) 3 / - 32 UNEF - 2A 8 0.125 (3.18) 2 0.062 (1.57) CW MTG. SURFACE 3 1 TOLERANCES: UNLESS OTHERWISE NOTED. SCHEMATIC DECIMALS 0.005 ANGLES 2 MECHANICAL SPECIFICATIONS PARAMETER Rotation 360 (continuous) 340 5 stops Bearing Type Sleeve STARTING RUNNING Torque (maximums) 1.0 oz. - in (72 g - cm) 0.7 oz. - in (50.40 g - cm) Runouts (maximums) Shaft Runout (TIR) 0.002 (0.05 mm) Pilot Dia. Runout (TIR) 0.003 (0.08 mm) Lateral Runout (TIR) 0.005 (0.13 mm) Shaft End Play 0.008 (0.20 mm) Shaft Radial Play 0.003 (0.08 mm) Weight 1.0 oz. maximum (28.35 g) Stop Strength 8.0 in - lbs (9.21 kg - cm) (stops version only) POWER RATING CHART 6.0 MARKING 5.0 Units shall be marked with Vishay Spectrol name, model number, resistance and 4.0 tolerance, linearity, terminal identification, and Unit data code Applicable test procedures: Identification 3.0 MIL-R-39023 Example of a marking for a standard part: 2.0 138-2-0-502 1.0 0 20 40 60 80 100 120 140 AMBIENT TEMPERATURE IN C Revision: 29-Nov-17 Document Number: 57033 2 For technical questions, contact: sferprecisionpot vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000 RATED POWER IN W