Features
■ Bushing mount
■ Excellent resolution
■ High rotational life
■ Non-standard features and
specifications available
6637 - Precision Potentiometer
Electrical Characteristics1
Product Dimensions
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)
6637
7/8 " (22 mm) DIA.
2
CW
4.83
(.19)
R
3
1
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
1.57
(.062)
30 °± 3 °
11.25 ± .38
(.443 ± .015)
TYP.
10.317 + .000/- .051
(.4062+.000/-.002)
3/8-32 UNEF-THD
DIA.
Environmental Characteristics1
3.170 + .000/-.008
(.1248+.0000/-.0003)
Operating Temperature Range...................................................................................+1 °C to +125 °C
Storage Temperature Range.....................................................................................-65 °C to +125 °C
Temperature Coefficient Over Storage Temperature Range........................... 500 ppmꢁ°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)
DIA.
22.23
(7/8)
DIA.
45 ° ± 5 °
.25
(.010)
CHAMFER
X
9.53 ± .79
(3/8 ± 1/32)
3.18
(1/8)
22.23 ± .79
(7/8 ± 1/32)
SHAFT SLOT
.81
(.032)
.81
WIDE X
DEEP
(.032)
NOTE: SHAFT SUPPORTED BY FRONT SLEEVE BEARING.
Total Resistance Shift ............................................................................................ 15 ꢀ maximum
IP Rating........................................................................................................................................IP 40
WIPER
2
Mechanical Characteristics1
CW
CCW
3
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 º maximum
Weight..........................................................................................................................................16 gm
Terminals.......................................................................................................................Rear turret type
Soldering Condition....................Recommended hand soldering using Sn95ꢁAg5 no clean solder,
0.025 ” wire diameter. Maximum temperature 399 °C (750 °F) for 3 seconds.
CLOCKWISE
MM
DIMENSIONS:
(IN.)
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.
1At room ambient: +25 °C nominal and 50 % relative humidity, except as noted.
Recommended Part Numbers
Resistance
Part Numbers
(Ω)
6637S-1-102
6637S-1-502
6637S-1-103
1,000
5,000
10,000
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
REV. 06/06
FOR OTHER OPTIONS CONSULT FACTORY.
*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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