3540/3541 - Precision Potentiometer
Features
■ Bushing mount
■ Optional center tap and rear
shaft extension
■ Optional AR lug feature
■ Gangable with common or concentric
shafts
■ High torque available
■ Optional 0.1 % linearity
■ Non-standard features and specifications
available
Electrical Characteristics
1
3540 Wirewound Element 3541 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 °, -0 °
Absolute Minimum Resistance/..........1 ohm or 0.1 % maximum........Minimum voltage
Minimum Voltage (whichever is greater) 0.2 % maximum
Noise ..................................................100 ohms ENR maximum ........Output smoothness 0.1 %
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 447 VAC, Whichever Is Less)
+70 °C ............................................2 watts......................................2 watts
+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 +125 °C
Storage Temperature Range ..............-55 °C to +125 °C ....................-55 °C to +125 °C
Temperature Coefficient Over
Storage Temperature Range
2
........±50 ppm/°C maximum/unit......±100 ppm/°C maximum/unit
Vibration..............................................15 G..........................................15 G
Wiper Bounce ................................0.1 millisecond maximum ........0.1 millisecond maximum
Shock..................................................50 G..........................................50 G
Wiper Bounce ................................0.1 millisecond maximum ........0.1 millisecond maximum
Load Life ............................................1,000 hours, 2 watts ................1,000 hours, 2 watts
Total Resistance Shift ....................±2 % ........................................±5 %
Rotational Life (No Load)....................1,000,000 shaft revolutions
2
....5,000,000 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...............................................................................................53 N-cm (75 oz-in.) minimum
Mechanical Angle ......................................................................................................3600 ° +10 °, -0 °
Torque (Starting & Running)......................................................................0.35 N-cm (0.5 oz.-in.) max.
Mounting.....................................................................................170-200 N-cm (15-18 lb.-in.) max.
Shaft Runout..................................................................................................0.08 mm (0.003 in.) T.I.R.
Lateral Runout ...............................................................................................0.13 mm (0.005 in.) T.I.R.
Shaft End Play...............................................................................................0.25 mm (0.010 in.) T.I.R.
Shaft Radial Play ...........................................................................................0.25 mm (0.010 in.) T.I.R.
Pilot Diameter Runout....................................................................................0.08 mm (0.003 in.) T.I.R.
Backlash........................................................................................................................1.0 ° maximum
Weight..................................................................................................................Approximately 21 gm
Terminals..........................................................................................................Gold-plated solder 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.) ...............................................................................2 cups maximum
Hardware ...................................................One lockwasher (H-37-2) and one mounting unit (H-38-2)
is shipped with each potentiometer.
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
3540S-1-201 200 .042
3540S-1-501 500 .031
3540S-1-102 1,000 .027
3540S-1-202 2,000 .021
3540S-1-502 5,000 .021
3540S-1-103 10,000 .019
3540S-1-203 20,000 .014
3540S-1-503 50,000 .011
3540S-1-104 100,000 .008
Part Number Resistance
3541H-1-102 1,000
3541H-1-202 2,000
3541H-1-502 5,000
3541H-1-103 10,000
3541H-1-203 20,000
3541H-1-503 50,000
3541H-1-104 100,000
