Features Non-standard features and speci cations In nite resolution element available Standard linearity: 1.0 % Extended temperature range: -65 C to +125 C Extended life version (6538) Output smoothness: 0.1 % standard Molded-in rear terminals 6537/6538 - 22 mm Precision Potentiometer 1 Product Dimensions Electrical Characteristics 6537 6538 Standard Resistance Range................1 K to 100 K ohms......................1 K to 100 K ohms 6537 Total Resistance Tolerance ..................10 % .........................................10 % 12.70 .38 Independent Linearity ..........................1 % ...........................................1 % (.500 .015) Effective Electrical Angle .....................340 3 ...................................340 3 1.57 End Voltage .........................................0.5 % maximum .........................0.5 % maximum 3.170+.000/-.008 DIA. (.062) (.1248+.0000/-.0003) Output Smoothness .............................0.1 % ..........................................0.1 % 1.57 Dielectric Withstanding Voltage (MIL-STD-202, Method 301) .25 (.062) 45 5 x CHAMFER Sea Level .........................................750 VAC minimum .....................750 VAC minimum (.010) 1.57 Power Rating (Voltage Limited By Power Dissipation or 300 VAC, Whichever is Less) (.062) +70 C ..............................................1 watt..........................................1 watt +125 C ............................................0 watt..........................................0 watt 22.23 Insulation Resistance (500 VDC) ........1,000 megohms minimum ..........1,000 megohms minimum (.875) Resolution............................................Essentially in nite.......................Essentially in nite DIA51 REF. (.020) 1 Environmental Characteristics 19.050+.000/-.012 Operating Temperature Range ............-40 C to +125 C .......................-40 C to +125 C 3.18 (.75+.0000/-.0005) Storage Temperature Range ...............-65 C to +125 C .......................-65 C to +125 C (.125) DIA. Temperature Coef cient Over Storage Temperature Range ......500 ppm/C maximum..............500 ppm/C maximum 12.70 .80 19.81 Vibration ..............................................15 G ...........................................15 G (.375 .031) (.780) DIA. Wiper Bounce ..................................0.1 millisecond maximum ...........0.1 millisecond maximum Total Resistance Shift ......................5 % maximum ..........................5 % maximum 4.80 Voltage Ratio Shift ...........................0.5 % maximum .......................0.5 % maximum R (.19) Shock...................................................50 G ...........................................50 G Wiper Bounce ..................................0.1 millisecond maximum ...........0.1 millisecond maximum Total Resistance Shift ......................5 % maximum ..........................5 % maximum Voltage Ratio Shift ...........................0.5 % maximum .......................0.5 % maximum 30 3 Load Life ..............................................1,000 hours, 1 watt.....................1,000 hours, 1 watt TYP. Total Resistance Shift ......................10 % maximum ........................10 % maximum 6538 BALL BEARING Rotational Life (No Load).....................10,000,000 shaft revolutions ......20,000,000 shaft revolutions 12.70 .38 Total Resistance Shift ......................10 % maximum ........................10 % maximum (.475 .015) Moisture Resistance (MIL-STD-202, Method 106) 1.57 Total Resistance Shift ......................15 % maximum ........................10 % maximum (.062) 1.57 IP Rating ..............................................IP 40 ...........................................IP 50 (.062) .25 45 15 x 1.57 1 (.010) Mechanical Characteristics CHAMFER (.062) Mechanical Angle ................................ Continuous ................................Continuous Torque (Starting & Running) ..................0.40 N-cm (0.5 oz.-in.) max.....0.18 N-cm (0.25 oz.-in.) max. 22.23 0.38 Shaft Runout........................................ 0.025 mm (0.001 in.) T.I.R.......0.025 mm (0.001 in.) T.I.R. (.875 .015) Lateral Runout ..................................... 0.08 mm (0.003 in.) T.I.R.........0.08 mm (0.003 in.) T.I.R. DIA. Shaft End Play ..................................... 0.13 mm (0.005 in.) T.I.R.........0.13 mm (0.005 in.) T.I.R51 REF. (.020) Shaft Radial Play ................................. 0.13 mm (0.005 in.) T.I.R.........0.08 mm (0.003 in.) T.I.R. Pilot Diameter Runout ......................... 0.06 mm (0.0025 in.) T.I.R.......0.06 mm (0.0025 in.) T.I.R. 19.050+.000/-.012 Backlash .............................................. 0.1 maximum ...........................0.1 maximum (.75+.0000/-.0005) Weight ................................................. 18 gm .........................................18 gm 3.18 0.38 DIA. Terminals ...................................................................................................... Molded-in rear turret type (.125 .015) Soldering Condition 12.70 .38 19.81 (.500 .031) Manual Soldering .................................96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire (.780) 370 C (700 F) max. for 3 seconds DIA. Wave Soldering ........................................................ 96.5Sn/3.0Ag/0.5Cu solder with no-clean ux 260 C (500 F) max. for 5 seconds 5.08 R Wash processes ..................................................................................................Not recommended (.020) Marking ................................................. Manufacturers name and part number, resistance value and tolerance, linearity tolerance, wiring diagram, and date code. Ganging (Multiple Section Pots.) .................................................................................1 cup maximum 45 5 Hardware ........................................................................................................... No hardware included 1 At room ambient: +25 C nominal and 50 % relative humidity nominal, except as noted. TOLERANCES: EXCEPT WHERE NOTED .25 .13 DECIMALS: .XX .XXX (.020), (.005) Recommended Part Numbers FRACTIONS: 1/64 MM Part Number Resistance ( ) Part Number Resistance () DIMENSIONS: (IN.) 6538S-1-102 1,000 6537S-1-102 1,000 6537S-1-502 5,000 6538S-1-202 2,000 WIPER 2 6538S-1-502 5,000 6537S-1-103 10,000 6538S-1-103 10,000 CCW CW 3 1 BOLDFACE LISTINGS ARE IN STOCK AND READILY AVAILABLE THROUGH DISTRIBUTION. CLOCKWISE FOR OTHER OPTIONS CONSULT FACTORY. *RoHS Directive 2015/863, Mar 31, 2015 and Annex. REV. 10/19 WARNING Specications are subject to change without notice. Users should verify actual device performance in their specic Cancer and Reproductive Harm applications. 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