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PL
IA
Features

NT
Bushing mount Excellent resolution High rotational life Non-standard features and specifications available
*R
oH
S
CO
M
6637 - Precision Potentiometer
Electrical Characteristics1
Standard Resistance Range....................................................................................1 K to 100 K ohms Total Resistance Tolerance .........................................................................................................10 % Independent Linearity ...................................................................................................................1 % Effective Electrical Angle .......................................................................................................340 3 End Voltage .................................................................................................................0.5 % maximum Output Smoothness ....................................................................................................0.1 % maximum 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 +125 C....................................................................................................................................0 watt Insulation Resistance (500 VDC)..................................................................1,000 megohms minimum Resolution..................................................................................................................Essentially infinite
Product Dimensions
6637 7/8 " (22 mm) DIA.
URNS BO
2
CW
3
1
4.83 R (.19)
1.57 11.25 .38 (.062) (.443 .015)
Environmental Characteristics1
Operating Temperature Range...................................................................................+1 C to +125 C Storage Temperature Range.....................................................................................-65 C to +125 C Temperature Coefficient Over Storage Temperature Range ...........................500 ppm/C maximum Vibration .........................................................................................................................................15 G Wiper Bounce ...........................................................................................0.1 millisecond maximum Total Resistance Shift ..............................................................................................5 % maximum Voltage Ratio Shift ................................................................................................0.5 % maximum Shock .............................................................................................................................................50 G Wiper Bounce ...........................................................................................0.1 millisecond maximum Total Resistance Shift ..............................................................................................5 % maximum Voltage Ratio Shift ................................................................................................0.5 % maximum Load Life .................................................................................................................1,000 hours, 1 watt Total Resistance Shift ............................................................................................10 % maximum Rotational Life (No Load) .........................................................................10,000,000 shaft revolutions Total Resistance Shift ............................................................................................10 % maximum Moisture Resistance (MIL-STD-202, Method 106) Total Resistance Shift ............................................................................................15 % maximum IP Rating ........................................................................................................................................IP 40
22.23 (7/8) DIA.
30 3 TYP. 10.317 + .000/- .051 DIA. (.4062+.000/-.002) 3/8-32 UNEF-THD 3.170 + .000/-.008 DIA. (.1248+.0000/-.0003)
45 5 .25 X (.010) CHAMFER 9.53 .79 (3/8 1/32) 22.23 .79 (7/8 1/32) SHAFT SLOT .81 .81 (.032) WIDE X (.032) DEEP
3.18 (1/8)
NOTE: SHAFT SUPPORTED BY FRONT SLEEVE BEARING.
2
CCW
WIPER
Mechanical Characteristics
1
Mechanical Angle ................................................................................................................Continuous Torque (Starting & Running) ..............................................................0.40 N-cm (0.5 oz.-in.) maximum Mounting.............................................................................170-200 N-cm (15-18 lb.-in.) maximum Shaft Runout................................................................................................0.025 mm (0.001 in.) T.I.R. Shaft End Play ...............................................................................................0.13 mm (0.005 in.) T.I.R. Shaft Radial Play ...........................................................................................0.13 mm (0.005 in.) T.I.R. Backlash ........................................................................................................................0.1 maximum Weight ..........................................................................................................................................16 gm Terminals.......................................................................................................................Rear turret type Soldering Condition....................Recommended hand soldering using Sn95/Ag5 no clean solder, 0.025 " wire diameter. Maximum temperature 399 C (750 F) for 3 seconds. No wash process to be used with no clean flux. Marking ................................Manufacturer's 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
1
CLOCKWISE
3
CW
DIMENSIONS:
MM (IN.)
At room ambient: +25 C nominal and 50 % relative humidity, except as noted.
Recommended Part Numbers
Part Numbers 6637S-1-102 6637S-1-502 6637S-1-103 Resistance () 1,000 5,000 10,000
BOLDFACE LISTINGS ARE IN STOCK AND READILY AVAILABLE THROUGH DISTRIBUTION. FOR OTHER OPTIONS CONSULT FACTORY. REV. 06/06 *RoHS Directive 2002/95/EC Jan 27 2003 including Annex Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.

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