Features
■ Essentially infi nite resolution
■ Excellent rotational life
■ High quality, rugged construction
■ General purpose applications
■ Non-standard features available
■ Cost and space saving
6539/6639 - Precision Potentiometer
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications
Electrical Characteristics1 6539 Servo Mount 6639 Bushing Mount
Standard Resistance Range................1 K to 100 K ohms......................1 K to 100 K ohms
Total Resistance Tolerance .................. ±15 % .........................................±15 %
Independent Linearity ..........................±2.0 % ........................................±2.0 %
Effective Electrical Angle ..................... 340 ° +3 ° ...................................340 ° +3 °
End Voltage ......................................... 0.5 % maximum .........................0.5 % maximum
Output Smoothness ............................. 0.1 % ..........................................0.1 %
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level .........................................750 VAC minimum .....................750 VAC minimum
Power Rating (Voltage Limited By Power Dissipation or 300 VAC, Whichever is Less)
+70 °C ..............................................1.0 watt.......................................1.0 watt
+125 °C ............................................0 watt..........................................0 watt
Insulation Resistance (500 VDC) ........ 500 megohms minimum .............500 megohms minimum
Resolution............................................Essentially infi nite.......................Essentially infi nite
Environmental Characteristics1
Operating Temperature Range ............+1 °C to +125 °C ........................-40 °C to +125 °C
Storage Temperature Range ...............-65 °C to +125 °C .......................-65 °C to +125 °C
Temperature Coeffi cient
Over Storage Temperature Range ...... ±500 ppm/°C maximum..............±500 ppm/°C maximum
Vibration .............................................. 15 G ...........................................15 G
Wiper Bounce ..................................0.1 millisecond maximum ...........0.1 millisecond maximum
Total Resistance Shift ......................±10 % .........................................±10 %
Voltage Ratio Shift ...........................±0.5 % ........................................±0.5 %
Shock...................................................50 G ...........................................50 G
Wiper Bounce ..................................0.1 millisecond maximum ...........0.1 millisecond maximum
Total Resistance Shift ......................±5 % ...........................................±5 %
Voltage Ratio Shift ...........................±0.5 % ........................................±0.5 %
Load Life ..............................................1,000 hours, 1 watt.....................1,000 hours, 1 watt
Total Resistance Shift ......................±10 % .........................................±10 %
Rotational Life (No Load).....................10,000,000 shaft revolutions ......10,000,000 shaft revolutions
Total Resistance Shift ......................±10 % maximum ........................±10 % maximum
Moisture Resistance (MIL-STD-202, Method 106)
Total Resistance Shift ......................±15 % .........................................±15 %
IP Rating .............................................. IP 40 ...........................................IP 40
Mechanical Characteristics1
Mechanical Angle ..........................................................Continuous, Stops (340 ° +8 °, -0 °) available
Torque (Starting & Running)2 ...................................................................0.40 N-cm (0.5 oz.-in.) max.
Mounting ..............................................................................170-200 N-cm (15-18 lb.-in.) maximum
Shaft Runout.................................................................................................0.13 mm (0.005 in.) T.I.R.
Lateral Runout ..............................................................................................0.08 mm (0.003 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.
Pilot Diameter Runout ................................................................................0.06 mm (0.0025 in.) T.I.R.
Backlash ....................................................................................................................... 0.1 º maximum
Weight ....................................................... 18 gm (6539 Servo Mount), 24 gm (6639 Bushing Mount)
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 Pots) ..................................................................................1 cup maximum
Hardware (6639 only) .................................One lockwasher (H-37-2) and one mounting nut (H-38-2)
is shipped with potentiometer.
1At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
22.82 N-cm (4.0 oz.-in.) max. at -40 °C.
Product Dimensions
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
FOR OTHER OPTIONS CONSULT FACTORY.
Recommended Part Numbers
Part Number Resistance (Ω)
6539S-1-102 1,000
6539S-1-502 5,000
6539S-1-103 10,000
*RoHS COMPLIANT
Part Numbers Resistance (Ω)
Continuous Turn Mechanical Stops
6639S-1-102 6639S-301-102 1,000
6639S-1-202 2,000
6639S-1-502 6639S-301-502 5,000
6639S-1-103 6639S-301-103 10,000
6639S-1-203 20,000
B
O
U
R
N
S
31
2
30 3
TYP.
CW
65/6639
6539
6639
3/8 " - 32 UNEF
13CW
CLOCKWISE
CCW
2WIPER
12.70 .38
(.500 .015)
3.170 +.000/-.008
(.1248+.0000/-.0003)
DIA. SHAFT
45 5 x
(.010
)
CHAMFER
.25
1.57
(.062)
1.57
(.062)
1.57
(.062) 19.050+ 000/-.012
(.750+.0000/-.0005)
19.81
(.780)
DIA.
.51
(.020)
REF
12.70 .79
(.500 .031)
3.18
(.125)
22.23
(.875)
DIA.
11.25 .38
(.443 .015)
1.57
(.062)
22.23
(.875)
DIA.
6.342+.000/-.008
(.2497+.0000/-.0003)
DIA. SHAFT
45 5
(.010) CHAMFER
.25
SLOT (.047) X (.063)
1.19 1.60
10.317+.000/-.051
(.4062+.000/-.002) DIA.
3.18
(.125)
.25
(.010)
REF
9.53 .79
(.375 .031)
22.23 .76
(.875 .03)
R
4.83
(.19)
TOLERANCES: EXCEPT WHERE NOTED
.51 .13
DECIMALS: .XX (.020) .XXX (.005)
FRACTIONS: 1/64
MM
DIMENSIONS: (IN.)
6539/6639 - Precision Potentiometer
Panel Thickness Dimensions
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications
REV. 10/11
10.44 ± .07
(.411 ± .003) DIA.
MM
(INCHES)
DIMENSIONS:
Panel thickness and hole diameters are
recommended for best fit. However, customers
may adjust the dimensions to suit their specific
application.
TOLERANCES: ± 0.127
(.005)
(For Bushing Mount Only)
PANEL
POT
LOCKWASHER
HEX NUT
2.46 - 3.81
(.097 - .150)
