Features
■ Bushing mount
■ Shaft supported by front sleeve bearing
■ Non-standard features and
specifications available
6657 - Precision Potentiometer
Electrical Characteristics1
Product Dimensions
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 ꢀ
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 ................................................................................................................................1.5 watts
+125 °C....................................................................................................................................0 watt
Insulation Resistance (500 VDC)..................................................................1,000 megohms minimum
Resolution ................................................................................................................Essentially infinite
1.57
(.062)
10.317+.000/-.051
(.4062+.000/-.002)
DIA. SHAFT
16.46 ± .38
(.648 ± .015)
3/8 "-32 UNEF-2ATHD
6.345 +.000/-.008
(.2498 +.0000/-.0003)
33.34
(1-5/16)
DIA.
DIA. SHAFT
45 ° ± 5 °
.38
X
(.015)
CHAMFER
Environmental Characteristics1
9.53 ± .79
(3/8± 1/32)
Operating Temperature Range...................................................................................+1 °C to +125 °C
Storage Temperature Range.....................................................................................-65 °C to +125 °C
Temperature Coefficient Over Storage Temperature Range........................... 500 ppmꢁ°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, 1.5 watts
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)
3.18
(1/8)
22.23 ± .79
(7/8 ± 1/32)
SHAFT SLOT
1.19
WIDE
(.047)
1.60
(.063)
DEEP
X
2
CW
6.35
(.25)
R
3
1
Total Resistance Shift ............................................................................................ 15 ꢀ maximum
IP Rating........................................................................................................................................IP 40
Mechanical Characteristics1
30 ° ± 3 °
TYP.
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 ° maximum
Weight..........................................................................................................................................32 gm
Terminals.......................................................................................................................Rear turret type
Soldering Condition....................Recommended hand soldering using Sn95ꢁAg5 no clean solder,
0.025 ” wire diameter. Maximum temperature 399 °C (750 °F) for 3 seconds.
TOLERANCES: EXCEPT WHERE NOTED
.51
(.02),
.13
(.005)
DECIMALS: .XX ±
FRACTIONS: ±1/64
.XXX ±
MM
(IN.)
DIMENSIONS:
No wash process to be used with no clean flux.
WIPER
2
Marking ................................Manufacturer’s name and part number, resistance value and tolerance,
linearity tolerance, wiring diagram, and date code.
Ganging (Multiple Section Potentiometers).................................................................1 cup maximum
Hardware ....................................................One lockwasher (H-37-2) and one mounting nut (H-38-2)
is shipped with each potentiometer.
CW
CCW
3
1
CLOCKWISE
1At room ambient: +25 °C nominal and 50 % relative humidity, except as noted.
Recommended Part Numbers
Resistance
Part Number*
(Ω)
6657S-1-102
6657S-1-202
6657S-1-502
6657S-1-103
1,000
2,000
5,000
10,000
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
REV. 06/06
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.
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