Model 157 www.vishay.com Vishay Spectrol 7 / " (22.2 mm) Precision Industrial Potentiometer, 8 Bushing And Servo Mount Versions, Conductive Plastic FEATURES • High quality • Rugged one piece metal housing • Long rotational life • Wide operating temperature range • Linearities down to ± 0.25 % special • Optional sealed construction (bushing mount only) • Material categorization: For definitions of compliance QUICK REFERENCE DATA please see www.vishay.com/doc?99912 Sensor type ROTATIONAL, conductive plastic Output type Output by turrets Market appliance Industrial 7 Dimensions / " (22.2 mm) 8 ELECTRICAL SPECIFICATIONS PARAMETER MIL-PRF-39023 TEST PROCEDURES APPLY Resistance 1 k to 100 k Resistance Tolerance ± 20 % Special to ± 10 % Linearity ± 2.0 % Special to ± 0.25 % Temperature Coefficient of Resistance ± 600 ppm/°C Power Rating 1.0 W at 40 °C ambient Derated to 0 W at 125 °C Electrical Angle 340° ± 4° End Voltage 0.5 % maximum Dielectric Withstanding 1000 V , 60 Hz RMS Insulation Resistance 100 M minimum, 500 V DC Output Smoothness 0.1 % MECHANICAL SPECIFICATIONS PARAMETER Weight 0.5 oz. maximum (14 g) Rotation 360° (continuous) Mount BUSHING SERVO Bearing Type Sleeve bearing Ball bearing Operating Torque 0.25 oz. - in (18 g - cm) Starting 0.30 oz. - in (21.6 g - cm) 0.15 oz. - in (10.8 g - cm) Running 0.25 oz. - in (18 g - cm) Mechanical Tolerance (in/mm) (maximum) Shaft Runout (TIR) 0.002" (0.05 mm) 0.002" (0.05 mm) Pilot Dia Runout (TIR) - 0.002" (0.05 mm) Lateral Runout (TIR) 0.005" (0.13 mm) 0.002" (0.05 mm) Shaft End Play 0.006" (0.15 mm) 0.005" (0.13 mm) Shaft Radial Play 0.003" (0.08 mm) 0.002" (0.05 mm) ORDERING INFORMATION/DESCRIPTION 157 B 50K 20 % C BO10 MODEL MOUNTING OHMIC VALUE TOLERANCE ON LINEARITY PACKAGING OHMIC VALUE B = Bushing C: ± 0.25 % Box of 10 pieces S = Servo Revision: 30-Aug-12 Document Number: 57042 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 157 www.vishay.com Vishay Spectrol SAP PART NUMBERING GUIDELINES 157 S 502 M X B10 MODEL STYLE OHMIC VALUE TOLERANCE ON LINEARITY PACKAGING OHMIC VALUE 502 = 5K M: ± 20 % X: ± 2 % Box of 10 pieces DIMENSIONS in inches (millimeters) BUSHING MOUNT: 157B... ± 0.031 ± 0.010 0.875 0.365 (22.22) (9.27) + 0.0000 90° Ø 0.9.52 x 1.57 WIDE - 0.0003 Ø 0.2497 IMPERFECT (6.34) THREAD AREA 157 - XXXX 0.312 XXXΩ ± XX% TERM 1 TERM 3 ± XX% XXXX (7.92) 12 3 XXX Country Ø 0.875 (22.2) MARKING TERM 2 ± 0.010 LOCATING PIN Ø 0.125 0.062 x 0.062 (3.18) 0.176 TERMINAL (1.57 x 1.57) ± 0.015 RADIUS (4.47) 0.345 RETAINER: Ø 0.312 x 0.03 MAX. (8.76) 3 / - 32 UNEF - 2A 8 ± 0.015 0.455 2 CW (11.56) RETAINER 0.062 (1.57) 1 3 Ø 0.20 MAX. x 0.02 MAX. (5.08) 0.062 (1.57) SCHEMATIC Ø 0.1248 Ø 0.050 Ø 0.1245 (1.27) (3.17) SERVO MOUNT: 157S... Ø 0.070 (1.78) Ø 0.750 Ø 0.7500 (19.05) (19.05) TOLERANCES: UNLESS OTHERWISE NOTED. Ø 0.7495 0.062 (1.57) DECIMALS ± 0.005 ANGLES ± 2° ± 0.031 0.500 (12.7) MATERIAL SPECIFICATIONS Housing/Bushing Aluminum, anodized Rear Lid Ceramic Shaft Stainless steel Terminals Solderable Bushing Mount Hardware Lockwasher, internal tooth steel, nickel plated Panel Nut Brass, nickel plated ENVIRONMENTAL SPECIFICATIONS Temperature - 55 °C + 125 °C BUSHING SERVO Rotational Life 5 million shaft revolutions 10 million shaft revolutions Moisture Resistant Yes Vibration 15 g 10 to 2000 Hz Shock 50 g Salt Spray 96 h Load Life 900 h Revision: 30-Aug-12 Document Number: 57042 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 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. 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Material Category Policy Vishay Intertechnology, Inc. hereby certifies that all its products that are identified as RoHS-Compliant fulfill the definitions and restrictions defined under Directive 2011/65/EU of The European Parliament and of the Council of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment (EEE) - recast, unless otherwise specified as non-compliant. Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that all the products identified as being compliant to Directive 2002/95/EC conform to Directive 2011/65/EU. Revision: 12-Mar-12 Document Number: 91000 1