3750/3751 - Precision Potentiometer
Features
Servo mount
Excellent resolution
Non-standard features and specifications
available
Small diameter
High rotational life
Electrical Characteristics
1
3750 Wirewound Element 3751 Hybritron
Element
Standard Resistance Range ..............100 to 100 K ohms ..................1 K to 100 K ohms
Total Resistance Tolerance ................5 % ........................................10 %
Independent Linearity ........................0.25 % ....................................0.25 %
Effective Electrical Angle ....................3600 +10 , -0 ....................3600 +10 , -4
Absolute Minimum Resistance/..........1 ohm or 0.1 % maximum........Minimum voltage
Minimum Voltage
(whichever is greater)
0.2 % maximum
Noise ..................................................500 ohms ENR maximum ........Output smoothness 0.15 %
maximum
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level ........................................1,000 VAC minimum ................1,000 VAC minimum
Power Rating (Voltage Limited By Power Dissipation or 315 VAC, Whichever Is Less)
+70 C ............................................1 watt........................................1 watt
+125 C ..........................................0 watt........................................0 watt
Insulation Resistance (500 VDC) ........1,000 megohms minimum ........1,000 megohms minimum
Resolution ............................................See recommended part nos. ....Essentially infinite
Environmental Characteristics
1
Operating Temperature Range ..........+1 C to +125 C ......................+1 C to +105 C
Storage Temperature Range ..............-65 C to +125 C ....................-55 C to +105 C
Temperature Coefficient Over
Storage Temperature Range
2
........50 ppm/C maximum/unit ......100 ppm/C maximum/unit
Vibration..............................................20 G ..........................................20 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 ....................2 % maximum ........................5 % maximum
Rotational Life (No Load) ....................1,000,000 shaft revolutions
2
....10,000,000 shaft revolutions
2
Total Resistance Shift ....................5 % maximum ........................5 % maximum
Moisture Resistance (MIL-STD-202, Method 103, Condition B)
Total Resistance Shift ....................2 % maximum ........................5 % maximum
IP Rating ............................................IP 40 ........................................IP 40
Mechanical Characteristics
1
Stop Strength ...............................................................................................14 N-cm (20 oz-in.) minimum
Mechanical Angle ......................................................................................................3600 +20 , -0
Torque
Starting .................................................................................................0.35 N-cm (0.5 oz.-in.) max.
Running ................................................................................................0.21 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 (0.005 in.) T.I.R.
Shaft Radial Play ...........................................................................................0.05 mm (0.002 in.) T.I.R.
Pilot Diameter Runout ...................................................................................0.05 mm (0.002 in.) T.I.R.
Backlash ........................................................................................................................1.0 maximum
Weight ...................................................................................................................Approximately 8.5 G
Terminals ...........................................................................................................Gold-plated turret lugs
Soldering Condition ....................Recommended hand soldering using Sn95/Ag5 no clean solder,
0.025 " wire diameter. Maximum temperature 399 C (750 F) for 3 seconds.
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
1
At room ambient: +25 C nominal and 50 % relative humidity nominal, except as noted.
2
Consult manufacturer for complete specification details.
Recommended Part Numbers
Part Number
Resistance ()
Resolution
3750S-1-102L
1,000
0.05
3750S-1-202L
2,000
0.04
3750S-1-502L
5,000
0.04
3750S-1-103L
10,000
0.02
Part Number
Resistance ()
3751H-1-102L
1,000
3751H-1-202L
2,000
3751H-1-502L
5,000
3751H-1-103L
10,000
3750/3751
28.40 .38
(1.118 .015)
3.18 + .25/ - .13
(.125 + .010/ .005)
1.57 + .25/ - .13
(.062 + .010/ - .005)
1.57 + .25/ - .03
(.062 + .010/- .005)
9.53 + .00/ - .03
(.375 + .010/- .005)
12.70 + .30/- .20
(.500 + .010/- .007)
9.53 .80
(3/8 1/32)
MAX.
DIA. MAX.
5.08 + .25/ - .12
(.20 + .010/- .005)
3.18 .40
(1/8 1/64)
10.71
(27/64)
12.7 .40
(1/2 1/64)
2.375 + .000/- .008
(.0935 + .000/- .0003)
TOLERANCES: EXCEPT WHERE NOTED
DECIMALS: .XX .XXX
DIMENSIONS:
FRACTIONS: 1/64
1
3
CW
CLOCKWISE
CCW
2
WIPER
10.16
(.400)
30.16
(1-3/16)
.25
(.010)
.13
(.005)
MM
(IN)
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
FOR OTHER OPTIONS CONSULT FACTORY.
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.
Models 3750 and 3751 are currently
available, although not recommended
for new designs.
*RoHS COMPLIANT
VERSIONS
AVAILABLE
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