Models 3750 and 3751 are currently
available, although not recommended
for new designs.
Features
■ Servo mount
■ Excellent resolution
■ Non-standard features and specifications
available
■ Small diameter
■ High rotational life
3750/3751 - Precision Potentiometer
Electrical Characteristics1
3750 Wirewound Element 3751 Hybritron¤ Element
3750/3751
28.40 ± .38
(1.118 ± .015)
Standard Resistance Range ..............100 to 100 K ohms ..................1 K to 100 K ohms
Total Resistance Tolerance ................±± ꢀ ........................................±10 ꢀ
Independent Linearity ........................±0.ꢁ± ꢀ....................................±0.ꢁ± ꢀ
Effective Electrical Angle ....................3600 ° +10 °, -0 ° ....................3600 ° +10 °, -4 °
Absolute Minimum Resistance/..........1 ohm or 0.1 ꢀ maximum........Minimum voltage
3.18 + .25/ - .13
(.125 + .010/– .005)
1.57 + .25/ - .13
(.062 + .010/ - .005)
1.57 + .25/ - .03
(.062 + .010/- .005)
Minimum Voltage
(whichever is greater)
0.ꢁ ꢀ maximum
9.53 + .00/ - .03
(.375 + .010/- .005)
Noise ..................................................±00 ohms ENR maximum ........Output smoothness 0.1± ꢀ
maximum
Dielectric Withstanding Voltage (MIL-STD-ꢁ0ꢁ, Method 301)
12.70 + .30/- .20
(.500 + .010/- .007)
Sea Level........................................1,000 VAC minimum ................1,000 VAC minimum
Power Rating (Voltage Limited By Power Dissipation or 31± VAC, Whichever Is Less)
+70 °C ............................................1 watt........................................1 watt
+1ꢁ± °C ..........................................0 watt........................................0 watt
Insulation Resistance (±00 VDC) ........1,000 megohms minimum........1,000 megohms minimum
Resolution ............................................See recommended part nos. ....Essentially infinite
10.16
DIA. MAX.
(.400)
30.16
9.53 ± .80
(3/8 ± 1/32)
MAX.
(1-3/16)
Environmental Characteristics1
Operating Temperature Range ..........+1 °C to +1ꢁ± °C......................+1 °C to +10± °C
Storage Temperature Range ..............-6± °C to +1ꢁ± °C ....................-±± °C to +10± °C
Temperature Coefficient Over
5.08 + .25/ - .12
(.20 + .010/- .005)
3.18 ± .40
(1/8 ± 1/64)
Storage Temperature Rangeꢁ ........±±0 ppm/°C maximum/unit......±100 ppm/°C maximum/unit
Vibration..............................................ꢁ0 G..........................................ꢁ0 G
Wiper Bounce ................................0.1 millisecond maximum ........0.1 millisecond maximum
Shock..................................................100 G........................................100 G
Wiper Bounce ................................0.1 millisecond maximum ........0.1 millisecond maximum
Load Life ............................................1,000 hours, 1 watt ..................1,000 hours, 1 watt
Total Resistance Shift ....................±ꢁ ꢀ maximum........................±± ꢀ maximum
Rotational Life (No Load)....................1,000,000 shaft revolutionsꢁ ....10,000,000 shaft revolutionsꢁ
Total Resistance Shift ....................±± ꢀ maximum........................±± ꢀ maximum
Moisture Resistance (MIL-STD-ꢁ0ꢁ, Method 103, Condition B)
10.71
(27/64)
2.375 + .000/- .008
(.0935 + .000/- .0003)
12.7 ± .40
(1/2 ± 1/64)
Total Resistance Shift ....................±ꢁ ꢀ maximum........................±± ꢀ maximum
IP Rating ............................................IP 40 ........................................IP 40
Mechanical Characteristics1
TOLERANCES: EXCEPT WHERE NOTED
Stop Strength...............................................................................................14 N-cm (ꢁ0 oz-in.) minimum
Mechanical Angle ......................................................................................................3600 ° +ꢁ0 °, -0 °
Torque
.25
(.010)
MM
(IN)
.13
(.005)
DECIMALS: .XX ±
.XXX ±
DIMENSIONS:
Starting .................................................................................................0.3± N-cm (0.± oz.-in.) max.
Running ................................................................................................0.ꢁ1 N-cm (0.3 oz.-in.) max.
Shaft Runout..................................................................................................0.08 mm (0.003 in.) T.I.R.
Lateral Runout ...............................................................................................0.08 mm (0.003 in.) T.I.R.
Shaft End Play...............................................................................................0.13 mm (0.00± in.) T.I.R.
Shaft Radial Play ...........................................................................................0.0± mm (0.00ꢁ in.) T.I.R.
Pilot Diameter Runout ...................................................................................0.0± mm (0.00ꢁ in.) T.I.R.
Backlash........................................................................................................................1.0 ° maximum
Weight...................................................................................................................Approximately 8.± G
Terminals ...........................................................................................................Gold-plated turret lugs
Soldering Condition....................Recommended hand soldering using Sn9±/Ag± no clean solder,
0.0ꢁ± ” wire diameter. Maximum temperature 399 °C (7±0 °F) for 3 seconds.
FRACTIONS: ±1/64
WIPER
2
CW
CCW
3
1
CLOCKWISE
No wash process to be used with no clean flux.
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
1At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
2Consult manufacturer for complete specification details.
Recommended Part Numbers
BOLDFACE LISTINGS ARE IN STOCK AND READILY
Part Number
Resistance (Ω)
1,000
Resolution
0.05
0.04
0.04
0.02
Part Number
3751H-1-102L
3751H-1-202L
3751H-1-502L
3751H-1-103L
Resistance (Ω)
1,000
AVAILABLE THROUGH DISTRIBUTION.
3750S-1-102L
3750S-1-202L
3750S-1-502L
3750S-1-103L
FOR OTHER OPTIONS CONSULT FACTORY.
2,000
5,000
10,000
2,000
5,000
10,000
TERMINALS:
L = RoHS COMPLIANT
BLANK = STANDARD
REV. 06/06
*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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