Features
■ Essentially infinite resolution
■ Excellent rotational life
■ High quality, rugged construction
■ General purpose applications
■ Non-standard features available
■ Cost and space saving
6539/6639 - Precision Potentiometer
Electrical Characteristics1
6539 Servo Mount
6639 Bushing Mount
Product Dimensions
Standard Resistance Range ..............1 K to 100 K ohms ..................1 K to 100 K ohms
Total Resistance Tolerance ................±1ꢀ ꢁ ......................................±1ꢀ ꢁ
Independent Linearity ........................±±.0 ꢁ......................................±±.0 ꢁ
Effective Electrical Angle ....................340 ° +3 °..................................340 ° +3 °
End Voltage ........................................0.ꢀ ꢁ maximum ......................0.ꢀ ꢁ maximum
Output Smoothness............................0.1 ꢁ ........................................0.1 ꢁ
Dielectric Withstanding Voltage (MIL-STD-±0±, Method 301)
Sea Level........................................7ꢀ0 VAC minimum....................7ꢀ0 VAC minimum
Power Rating (Voltage Limited By Power Dissipation or 300 VAC, Whichever is Less)
+70 °C ............................................1.0 watt ....................................1.0 watt
+1±ꢀ °C ..........................................0 watt........................................0 watt
Insulation Resistance (ꢀ00 VDC) ........ꢀ00 megohms minimum ..........ꢀ00 megohms minimum
Resolution ..........................................Essentially infinite ....................Essentially infinite
6539
3.170 +.000/-.008
(.1248+.0000/-.0003)
12.70 ± .38
(.500 ± .015)
1.57
(.062)
DIA. SHAFT
.25
45 ° ± 5 ° x
(.010)
1.57
(.062)
1.57
CHAMFER
19.050+ 000/-.012
(.750+.0000/-.0005)
(.062)
22.23
(.875)
DIA.
19.81
(.780)
DIA.
Environmental Characteristics1
Operating Temperature Range ..........+1 °C to +1±ꢀ °C......................-40 °C to +1±ꢀ °C
Storage Temperature Range ..............-6ꢀ °C to +1±ꢀ °C ....................-6ꢀ °C to +1±ꢀ °C
Temperature Coefficient
.51
(.020)
REF
Over Storage Temperature Range......±ꢀ00 ppmꢂ°C maximum ..........±ꢀ00 ppmꢂ°C maximum
Vibration..............................................1ꢀ G..........................................1ꢀ G
Wiper Bounce ................................0.1 millisecond maximum ........0.1 millisecond maximum
Total Resistance Shift ....................±10 ꢁ ......................................±10 ꢁ
Voltage Ratio Shift..........................±0.ꢀ ꢁ......................................±0.ꢀ ꢁ
Shock..................................................ꢀ0 G..........................................ꢀ0 G
Wiper Bounce ................................0.1 millisecond maximum ........0.1 millisecond maximum
Total Resistance Shift ....................±ꢀ ꢁ ........................................±ꢀ ꢁ
Voltage Ratio Shift..........................±0.ꢀ ꢁ......................................±0.ꢀ ꢁ
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-±0±, Method 106)
12.70 ± .79
(.500 ± .031)
3.18
(.125)
6639
10.317+.000/-.051
(.4062+.000/-.002)
11.25 ± .38
(.443±.015)
DIA.
6.342+.000/-.008
(.2497+.0000/-.0003)
1.57
(.062)
DIA. SHAFT
.25
45 ° ± 5° ±
CHAMFER
(.010)
1.19
1.60
SLOT
X
22.23
(.875)
DIA.
(.047) (.063)
Total Resistance Shift ....................±1ꢀ ꢁ ......................................±1ꢀ ꢁ
IP Rating ............................................IP 40 ........................................IP 40
Mechanical Characteristics1
.25
Mechanical Angle..........................................................Continuous, Stops (340 ° +8 °, -0 °) available
Torque (Starting & Running)2 .....................................................................0.40 N-cm (0.ꢀ oz.-in.) max.
Mounting.............................................................................170-±00 N-cm (1ꢀ-18 lb.-in.) maximum
Shaft Runout..................................................................................................0.13 mm (0.00ꢀ in.) T.I.R.
Lateral Runout ...............................................................................................0.08 mm (0.003 in.) T.I.R.
Shaft End Play...............................................................................................0.13 mm (0.00ꢀ in.) T.I.R.
Shaft Radial Play ...........................................................................................0.13 mm (0.00ꢀ in.) T.I.R.
Pilot Diameter Runout .................................................................................0.06 mm (0.00±ꢀ in.) T.I.R.
Backlash........................................................................................................................0.1 º maximum
Weight ........................................................18 gm (6ꢀ39 Servo Mount), ±4 gm (6639 Bushing Mount)
Terminals......................................................................................................................Rear Turret Type
Soldering Condition....................Recommended hand soldering using Sn9ꢀꢂAgꢀ no clean solder,
0.0±ꢀ ” wire diameter. Maximum temperature 399°C (7ꢀ0 °F) for 3 seconds.
3/8 " - 32 UNEF (.010)
REF
9.53 ± .79
(.375 ± .031)
22.23 ± .76
(.875 ± .03)
3.18
(.125)
65/6639
2
CW
4.83
No wash process to be used with no clean flux.
R
(.19)
Marking .................................................Manufacturer’s name and part number, resistance value and
tolerance, linearity tolerance, wiring diagram, and date code.
3
1
Ganging (Multiple Section Pots) ..................................................................................1 cup maximum
Hardware (6639 only)..................................One lockwasher (H-37-±) and one mounting nut (H-38-±)
is shipped with potentiometer.
30 °± 3 °
1 At room ambient: +25 °C nominal and 50 % relative humidity, except as noted.
TYP.
2 2.82 N-cm (4.0 oz.-in.) max. at -40 °C.
TOLERANCES: EXCEPT WHERE NOTED
Recommended Part Numbers
.51
(.020)
.13
(.005)
DECIMALS: .XX ±
.XXX ±
FRACTIONS: ±1/64
MM
DIMENSIONS:
(IN.)
Part Numbers
Resistance
Resistance
Part Number
(Ω)
Continuous Turn
Mechanical Stops
(Ω)
6639S-1-102 6639S-301-102
6639S-1-202
1,000
2,000
5,000
6539S-1-102
6539S-1-502
6539S-1-103
1,000
5,000
10,000
WIPER
2
6639S-1-502 6639S-301-502
CW
CCW
3
1
6639S-1-103 6639S-301-103 10,000
6639S-1-203
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
20,000
CLOCKWISE
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.
REV. 06/06
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