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
DIA.
.25
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 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Speci cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their speci c applications.
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)
REV. 01/15
Speci cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their speci c applications.