Features
■ Bushing mount
■ RoHS compliant*
■ Optional center tap and rear shaft extension
■ Optional AR lug feature
■ Gangable with common or concentric shafts
■ High torque available
■ Non-standard features and specifications
available
3540/3541 - Precision Potentiometer
3540 Wirewound Element 3541 Hybritron® Element
1
Product Dimensions
Electrical Characteristics
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..........0.2 % maximum
Minimum Voltage.............................(whichever is greater)
3540S-1/3541H-1
13.ꢀ
(.72ꢂ
14.ꢀ5 .ꢀ3
(.565 .ꢁ15ꢂ
5.72 .ꢀ3
(.225 .ꢁ15ꢂ
Noise/Output Smoothness ..................100 ohms ENR maximum..........0.1 % maximum
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
1
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
1ꢁ.ꢀ2 +.ꢁꢁ/.ꢁ5
(.4ꢁ6+.ꢁꢁꢁ/-.ꢁꢁ2ꢂ
DIA.
ꢀ
ꢀ/3 " ꢀ2-UNEF-2ATHD
.25
2
X 45 ° CHAMFER
(.ꢁ1ꢁꢂ
ADJUSTMENT
.31
SLOT
WIDE
1
Environmental Characteristics
(.ꢁꢀ2ꢂ
.31 .25
(.ꢁꢀ2 .ꢁ1ꢁꢂ
Operating Temperature Range............-40 °C to +125 °C.......................-40 °C to +125 °C
Storage Temperature Range ...............-55 °C to +125 °C.......................-55 °C to +125 °C
Temperature Coefficient Over
X
DEEP
1.52
(.ꢁ6ꢂ
6.ꢀ42 + .ꢁꢁꢁ/ - .ꢁ2ꢀ
(.2497+.ꢁꢁꢁꢁ/-.ꢁꢁꢁ9ꢂ
DIA.
2
Storage Temperature Range ..........±50 ppm/°C maximum/unit.........±100 ppm/°C maximum/unit
7.92 .ꢀ3
(.ꢀ12 .ꢁ15ꢂ
Vibration ..............................................15 G ...........................................15 G
Wiper Bounce..................................0.1 millisecond maximum...........0.1 millisecond maximum
Shock...................................................50 G ...........................................50 G
19.ꢁ5 .ꢀ3
(.75ꢁ .ꢁ15ꢂ
2ꢁ.62 .79
(.312 .ꢁꢀ1ꢂ
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 %
2
2
OPTIONAL ANTIROTATION LUG
(-91ꢂ 1.42 X .5ꢁ ON 7.4 RADIUS.
Rotational Life (No Load).....................1,000,000 shaft revolutions .....5,000,000 shaft revolutions
Total Resistance Shift......................±5 % maximum ..........................±5 % maximum
Moisture Resistance (MIL-STD-202, Method 103, Condition B)
LENGTH 1.27 FROM MOUNTING SURFACE.
(SUGGESTED PANEL HOLE 1.6 DIA.ꢂ
Total Resistance Shift......................±2 % maximum ..........................±5 % maximum
IP Rating..............................................IP 40...........................................IP 40
ꢀꢁ °
5 °
6.ꢀ5
(.25ꢂ
1
Mechanical Characteristics
15.33
(.625ꢂ
R MAX.
Stop Strength..........................................................................................53 N-cm (75 oz-in.) minimum
Mechanical Angle ......................................................................................................3600 ° +10 °, -0 °
Torque
12.45
(.49ꢂ
Starting & Running @ +25 °C...............................................................0.49 N-cm (0.7 oz.-in.) max.
Starting & Running @ -40 °C................................................................1.76 N-cm (2.5 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..............................................................................................0.30 mm (0.012 in.) T.I.R.
Shaft Radial Play..........................................................................................0.08 mm (0.003 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
MTG. FACE
15.33
(.625ꢂ
DIA. MIN.
22.2ꢀ .ꢀ3
(.375 .ꢁ15ꢂ
TOLERANCES: EXCEPT WHERE NOTED
.25
(.ꢁ1ꢁꢂ,
.1ꢀ
(.ꢁꢁ5ꢂ
DECIMALS: .XX
.XXX
Manual Soldering...........................................................96.5Sn/3.0Ag/0.5Cu solid wire or no-clean
rosin cored wire; 370 °C (700 °F) max. for 3 seconds
FRACTIONS: 1/64
MM
DIMENSIONS:
(IN.ꢂ
Wave Soldering .................... 96.5Sn/3.0Ag/0.5Cu solder with no-clean flux; 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.)............................................................................... 2 cups maximum
Hardware....................................................One lockwasher (H-37-2) and one mounting nut (H-38-2)
is shipped with each potentiometer.
WIPER
2
CW
CCW
ꢀ
1
CLOCKWISE
1
At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
2
Consult manufacturer for complete specification details.
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
Recommended Part Numbers
FOR OTHER OPTIONS CONSULT FACTORY.
Part Number
Resistance (Ω)
200
Resolution
.042
Part Number
Resistance (Ω)
1,000
3540S-1-201L
3540S-1-501L
3540S-1-102L
3540S-1-202L
3540S-1-502L
3540S-1-103L
3540S-1-203L
3540S-1-503L
3540S-1-104L
3541H-1-102L
3541H-1-202L
3541H-1-502L
3541H-1-103L
3541H-1-203L
3541H-1-503L
3541H-1-104L
ROHS IDENTIFIER:
L = COMPLIANT
500
1,000
2,000
5,000
10,000
20,000
50,000
100,000
.031
.027
.021
.021
.019
.014
.011
.008
2,000
5,000
10,000
20,000
50,000
100,000
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Specifications are subject to change without notice. Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page
of this document, and at
*RoHS Directive 2ꢁ15/36ꢀ, Mar ꢀ1, 2ꢁ15 and Annex.
www.bourns.com/legal/disclaimer.pdf.
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