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 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
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 Characteristics
1
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 Characteristics
1
Mechanical Angle ..........................................................Continuous, Stops (340 ° +8 °, -0 °) available
Stop Strength (applies to -301 with mechanical stops only) ..................................22.6 N-cm (2 lb.-in.)
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.
1
At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
2
2.82 N-cm (4.0 oz.-in.) max. at -40 °C.
Product Dimensions
B
O
U
R
N
S
31
2
30 °±3 °
TYP.
CW
65/6639
6539
6639
3/8 " - 32 UNEF
1
3
CW
CLOCKWISE
CCW
2
WIPER
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
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.)
45° ± 5 ° x
(.010)
CHAMFER
.25
