Page 1
Features
*RoHS COMPLIANT
■ Bushing mount
■ Optional center tap and rear shaft extension
■ Optional AR lug feature
■ Gangable with common or concentric shafts
■ High torque available
■ Non-standard features and specifi cations
available
■ RoHS compliant*
3540/3541 - Precision Potentiometer
Electrical Characteristics1 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 .........0.2 % maximum
Minimum Voltage ............................. (whichever is greater)
Noise/Output Smoothness .................100 ohms ENR maximum ..........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 infi nite
Environmental Characteristics
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 Coeffi cient Over
Storage Temperature Range2 ..........±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 revolutions2 .....5,000,000 shaft revolutions
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
Stop Strength .........................................................................................53 N-cm (75 oz-in.) minimum
Mechanical Angle ..................................................................................................... 3600 ° +10 °, -0 °
Torque
Starting & Running @ +25 °C ...............................................................0.35 N-cm (0.5 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
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.) ...............................................................................2 cups maximum
Hardware ....................................................One lockwasher (H-37-2) and one mounting nut (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 specifi cation details.
Recommended Part Numbers
Part Number Resistance (Ω) Resolution
3540S-1-201L 200 .042
3540S-1-501L 500 .031
3540S-1-102L 1,000 .027
3540S-1-202L 2,000 .021
3540S-1-502L 5,000 .021
3540S-1-103L 10,000 .019
3540S-1-203L 20,000 .014
3540S-1-503L 50,000 .011
3540S-1-104L 100,000 .008
Product Dimensions
3540S-1/3541H-1
1
2
1
2
1
BOLDFACE LISTINGS ARE IN STOCK AND READILY
Part Number Resistance (Ω)
3541H-1-102L 1,000
3541H-1-202L 2,000
3541H-1-502L 5,000
3541H-1-103L 10,000
AVAILABLE THROUGH DISTRIBUTION.
FOR OTHER OPTIONS CONSULT FACTORY.
ROHS IDENTIFIER:
L = COMPLIANT
3541H-1-203L 20,000
3541H-1-503L 50,000
3541H-1-104L 100,000
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Customers should verify actual device performance in their specifi c applications.
18.3
(.72)
14.35 ± .38
(.565±.015)
3
1.52
(.06)
7.92 ± .38
(.312 ± .015)
19.05 ± .38
(.750 ± .015)
15.88
R MAX.
(.625)
TOLERANCES: EXCEPT WHERE NOTED
.25 .13
DECIMALS: .XX ±
FRACTIONS: ±1/64
MM
DIMENSIONS:
CCW
1
5.72 ± .38
(.225±.015)
10.32 +.00/.05
(.406+.000/-.002)
20.62 ± .79
(.812 ± .031)
OPTIONAL ANTIROTATION LUG
(-91) 1.42 X .50 ON 7.4 RADIUS.
LENGTH 1.27 FROM MOUNTING SURFACE.
(SUGGESTED PANEL HOLE 1.6 DIA.)
30 °
± 5 °
22.23 ± .38
(.875 ± .015)
(.010),
(IN.)
2
CLOCKWISE
DIA.
3/8 " 32-UNEF-2ATHD
.25
(.010)
ADJUSTMENT
SLOT
.81±.25
X
(.032±.010)
6.342 + .000/ - .023
(.2497+.0000/-.0009)
6.35
(.25)
12.45
(.49)
MTG. FACE
15.88
(.625)
.XXX ±
(.005)
WIPER
3
X 45 ° CHAMFER
.81
(.032)
DIA.
CW
Specifi cations are subject to change without notice.
WIDE
DEEP
DIA. MIN.
Page 2
3540/3541 - Precision Potentiometer
Panel Thickness Dimensions
10.41 ± .08
(.410 ± .003)
DIA.
7.42
R
(.292)
ADDITIONAL HOLE FOR
ANTI-ROTATION PIN
1.60 +.08/-.03
DIA.
(.063 +.003/-.001)
HEX NUT
LOCKWASHER
2.46 - 3.81
(.097 - .150)
PANEL
POT
Anti-rotation pin hole is shown at six o'clock
position for reference only. The actual location is
determined by the customer's application. Refer
to the front view of the potentiometer to see the
location of the optional A/R pin.
DIMENSIONS:
TOLERANCES: ±
MM
(INCHES)
0.127
(.005)
REV. 07/11
“Hybritron” is a registered trademark of Bourns, Inc.
Customers should verify actual device performance in their specifi c applications.
Specifi cations are subject to change without notice.
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