Features
■ Servo mount
■ Excellent resolution
■ Non-standard features and specifi cations
available
■ Small diameter
■ High rotational life
■ RoHS compliant*
3750/3751 - Precision Potentiometer
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 infi nite
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 Coeffi cient 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
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
1
At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
2
Consult manufacturer for complete specifi cation details.
Product Dimensions
Recommended Part Numbers
Part Number Resistance (Ω) 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 (Ω)
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.
ROHS IDENTIFIER:
L = COMPLIANT*
“Hybritron” is a registered trademark of Bourns, Inc.
*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.
Customers should verify actual device performance in
their specifi c applications.
REV. 06/12
