PL
IA
N
T
Features
■
Bushing mount
■
Shaft supported by front sleeve bearing
■
Non-standard features and specifications available
*R
oH
S
CO
M
6657 - Precision Potentiometer
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 %
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
Product Dimensions
1.57
(.062)
16.46
±
.38
(.648
±
.015)
10.317+.000/-.051
(.4062+.000/-.002)
DIA. SHAFT
3/8 "-32 UNEF-2ATHD
33.34
(1-5/16)
DIA.
6.345 +.000/-.008
(.2498 +.0000/-.0003)
DIA. SHAFT
45
° ±
5
°
.38
X
(.015)
CHAMFER
9.53
±
.79
(3/8± 1/32)
3.18
(1/8)
22.23
±
.79
(7/8
±
1/32)
SHAFT SLOT
1.19
WIDE
(.047)
1.60
DEEP
X
(.063)
Environmental Characteristics
1
Operating Temperature Range ................................................................................. -40 °C to +125 °C
Storage Temperature Range .................................................................................... -65 °C to +125 °C
Temperature Coefficient 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, 1.5 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)
Total Resistance Shift .............................................................................................±15 % maximum
IP Rating ....................................................................................................................................... IP 40
UR
BO
NS
2
CW
3
1
6.35
R
(.25)
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 ° maximum
Weight ........................................................................................................................................ 32 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 flux
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 cup 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.
30
° ±
3
°
TYP.
TOLERANCES: EXCEPT WHERE NOTED
.51
.13
DECIMALS: .XX
±
.XXX
±
(.02),
(.005)
FRACTIONS:
±1/64
MM
DIMENSIONS:
(IN.)
2
CCW
WIPER
1
CLOCKWISE
3
CW
Recommended Part Numbers
Part Number*
Resistance (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.
FOR OTHER OPTIONS CONSULT FACTORY.
ROHS IDENTIFIER:
L = COMPLIANT
BLANK = NON-COMPLIANT
*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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