S N R Features Bushing mount Excellent resolution High rotational life Non-standard features and speci cations available 6637 - Precision Potentiometer 1 Electrical Characteristics Product Dimensions Standard Resistance Range....................................................................................1 K to 100 K ohms 6637 Total Resistance Tolerance ......................................................................................................... 10 % 7/8 (22 mm) DIA. Independent Linearity ................................................................................................................... 1 % Effective Electrical Angle .......................................................................................................340 3 2 End Voltage .................................................................................................................0.5 % maximum CW 4.83 Output Smoothness .....................................................................................................0.1 % maximum R (.19) 31 Dielectric Withstanding Voltage (MIL-STD-202, Method 301) Sea Level .............................................................................................................750 VAC minimum Power Rating (Voltage Limited By Power Dissipation or 300 VAC, Whichever is Less) +70 C ......................................................................................................................................1 watt 1.57 30 3 +125 C ....................................................................................................................................0 watt (.062) 11.25 .38 TYP. Insulation Resistance (500 VDC) ................................................................1,000 megohms minimum (.443 .015) 10.317 + .000/- .051 DIA. Resolution.................................................................................................................Essentially in nite (.4062+.000/-.002) 3/8-32 UNEF-THD 1 Environmental Characteristics 3.170 + .000/-.008 DIA. 22.23 (.1248+.0000/-.0003) Operating Temperature Range .................................................................................-40 C to +125 C (7/8) 45 5 Storage Temperature Range ....................................................................................-65 C to +125 C DIA25 Temperature Coef cient Over Storage Temperature Range ...........................500 ppm/C maximum X (.010) Vibration ........................................................................................................................................15 G CHAMFER Wiper Bounce ...........................................................................................0.1 millisecond maximum Total Resistance Shift ...............................................................................................5 % maximum 9.53 .79 Voltage Ratio Shift .................................................................................................0.5 % maximum (3/8 1/32) 3.18 Shock.............................................................................................................................................50 G (1/8) 22.23 .79 Wiper Bounce ...........................................................................................0.1 millisecond maximum (7/8 1/32) Total Resistance Shift ...............................................................................................5 % maximum SHAFT SLOT Voltage Ratio Shift .................................................................................................0.5 % maximum .81 .81 WIDE X DEEP (.032) (.032) Load Life .................................................................................................................1,000 hours, 1 watt Total Resistance Shift .............................................................................................10 % maximum NOTE: SHAFT SUPPORTED BY FRONT SLEEVE BEARING. Rotational Life (No Load)......................................................................... 10,000,000 shaft revolutions Total Resistance Shift .............................................................................................10 % maximum Moisture Resistance (MIL-STD-202, Method 106) WIPER 2 Total Resistance Shift .............................................................................................15 % maximum IP Rating .......................................................................................................................................IP 40 CCW 3 CW 1 1 Mechanical Characteristics CLOCKWISE Mechanical Angle ............................................................................................................... Continuous Torque (Starting & Running) .............................................................0.40 N-cm (0.5 oz.-in.) maximum Recommended Part Numbers Mounting ..............................................................................170-200 N-cm (15-18 lb.-in.) maximum Shaft Runout...............................................................................................0.025 mm (0.001 in.) T.I.R. Part Number Resistance () Shaft End Play ..............................................................................................0.13 mm (0.005 in.) T.I.R. 6637S-1-102 1,000 Shaft Radial Play ..........................................................................................0.13 mm (0.005 in.) T.I.R. 6637S-1-502 5,000 Backlash ....................................................................................................................... 0.1 maximum 6637S-1-103 10,000 Weight ........................................................................................................................................ 16 gm Terminals ..................................................................................................................... Rear turret type BOLDFACE LISTINGS ARE IN STOCK AND READILY Soldering Condition AVAILABLE THROUGH DISTRIBUTION. Manual Soldering .................................96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire FOR SERVO MOUNT VERSION AND OTHER OPTIONS 370 C (700 F) max. for 3 seconds CONSULT FACTORY. Wave Soldering ........................................................ 96.5Sn/3.0Ag/0.5Cu solder with no-clean ux 260 C (500 F) max. for 5 seconds Wash processes ..................................................................................................Not recommended Marking ................................ Manufacturers name and part number, resistance value and tolerance, linearity tolerance, wiring diagram, and date code. Ganging (Multiple Section Potentiometers) ...................................................................1 up maximum Hardware ...................................One lockwasher (H-37-2) and one mounting nut (H-38-2) is shipped with each potentiometer. 1 At room ambient: +25 C nominal and 50 % relative humidity nominal, except as noted. *RoHS Directive 2015/863, Mar 31, 2015 and Annex. WARNING Specications are subject to change without notice. Users should verify actual device performance in their specic Cancer and Reproductive Harm applications. The products described herein and this document are subject to specic legal disclaimers as set forth on the www.P65Warnings.ca.gov last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. U O B *RoHS COMPLIANT 6637 - Precision Potentiometer Panel Thickness Dimensions 2.46 - 3.81 (.097 - .150) PANEL HEX NUT 10.44 .07 DIA. (.411 .003) LOCKWASHER POT Panel thickness and hole diameters are recommended for best fit. However, customers may adjust the dimensions to suit their specific application. 0.127 MM DIMENSIONS: TOLERANCES: (.005) (INCHES) Asia-Pacific: Tel: +886-2 2562-4117 Email: asiacus bourns.com EMEA: Tel: +36 88 885 877 Email: eurocus bourns.com The Americas: Tel: +1-951 781-5500 Email: americus bourns.com www.bourns.com REV. 10/19 Specications are subject to change without notice. Users should verify actual device performance in their specic applications. The products described herein and this document are subject to specic legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.