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

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

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

CLOCKWISE

CCW

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.