Features
■ Bushing mount
■ Excellent resolution
■ High rotational life
■ Non-standard features and specifi cations available
6637 - Precision Potentiometer
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi 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 specifi c applications.
Electrical Characteristics
1
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 infi nite
Environmental Characteristics
1
Operating Temperature Range ................................................................................. -40 °C to +125 °C
Storage Temperature Range .................................................................................... -65 °C to +125 °C
Temperature Coeffi cient 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
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 º maximum
Weight ........................................................................................................................................ 16 gm
Terminals ..................................................................................................................... Rear turret type
Soldering Condition
Manual Soldering .................................96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire
370 °C (700 °F) max. for 3 seconds
Wave Soldering ........................................................ 96.5Sn/3.0Ag/0.5Cu solder with no-clean fl ux
260 °C (500 °F) max. for 5 seconds
Wash processes ..................................................................................................Not recommended
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
At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
Product Dimensions
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
FOR SERVO MOUNT VERSION AND OTHER OPTIONS
CONSULT FACTORY.
Recommended Part Numbers
Part Number Resistance (Ω)
6637S-1-102 1,000
6637S-1-502 5,000
6637S-1-103 10,000
B
O
U
R
N
S
31
2
30 °° 3 °
TYP.
CW
1
3
CW
CLOCKWISE
CCW
2
WIPER
3/8-32 UNEF-THD
22.23 ° .79
(7/8 ° 1/32)
45 ° ° 5 °
X
CHAMFER
NOTE: SHAFT SUPPORTED BY FRONT SLEEVE BEARING.
6637
7/8 " (22 mm) DIA.
4.83
(.19)
R
1.57
(.062)
.25
(.010)
11.25 ° .38
(.443
° .015)
22.23
(7/8)
DIA.
10.317 + .000/- .051
(.4062+.000/-.002)
DIA.
DIA.
3.170 + .000/-.008
(.1248+.0000/-.0003)
9.53 ° .79
(3/8 ° 1/32)
SHAFT SLOT
(.032)
WIDE X
(.032)
DEEP
.81
.81
3.18
(1/8)
*RoHS COMPLIANT
