3750 Datasheet, PDF (1/1 Pages) Bourns Electronic Solutions – Precision Potentiometer

*RoHS ^{VCEOARMVSAPIOILLINAASBNLTE}
Features
■ Servo mount
■ Excellent resolution
■ Non-standard features and specifications
available
■ Small diameter
■ High rotational life
Models 3750 and 3751 are currently
available, although not recommended
for new designs.
3750/3751 - Precision Potentiometer
Electrical Characteristics¹ 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 Characteristics¹
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 Range² ........±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 revolutions² ....10,000,000 shaft revolutions²
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 Characteristics¹
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
3750S-1-102L
3750S-1-202L
3750S-1-502L
3750S-1-103L
Resistance (Ω)
1,000
2,000
5,000
10,000
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
2,000
5,000
10,000
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.
3750/3751
28.40 ± .38
(1.118 ± .015)
1.57 + .25/ - .13
(.062 + .010/ - .005)
10.16 _{DIA. MAX.}
(.400) _{30.16 MAX.}
(1-3/16)
3.18 + .25/ - .13
(.125 + .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)
5.08 + .25/ - .12
(.20 + .010/- .005)
3.18 ± .40
(1/8 ± 1/64)
2.375 + .000/- .008
(.0935 + .000/- .0003)
10.71
(27/64)
12.7 ± .40
(1/2 ± 1/64)
TOLERANCES: EXCEPT WHERE NOTED
.25
.13
DECIMALS: .XX ±_(.010) .XXX ± _(.005)
DIMENSIONS:
MM
(IN)
FRACTIONS: ±1/64
2 ^WIPER
CCW ₁
CLOCKWISE
3 CW
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
FOR OTHER OPTIONS CONSULT FACTORY.
TERMINALS:
L = RoHS COMPLIANT
BLANK = STANDARD