Features
Wirewound and Hybritron elements Designed for HMI and MMI applications
High rotational life Dual gang option
Optional 0.1 % linearity Servo mount option
Optional A/R lug Dual ball bearing option
RoHS compliant*
Suitable for use under some side load
conditions
3549 - 10-Turn Precision Potentiometer
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Electrical Characteristics Wirewound Element Hybritron Element
Standard Resistance Range..................................................................100 to 100K ohms ..................................................1K to 100K ohms
Total Resistance Tolerance ....................................................................3 % .......................................................................10 %
Independent Linearity ............................................................................0.2 % ....................................................................0.2 %
Independent Linearity (Maximum Practical) ..........................................0.1 % ....................................................................0.1 %
Effective Electrical Angle .......................................................................3600 +10 , -0 ....................................................3600 +10 , -0
Absolute Minimum Resistance/End Voltage ..........................................1 ohm or 0.1 % maximum ......................................0.2 % maximum
(whichever is greater)
Noise/Output Smoothness ....................................................................100 ohms maximum ...............................................0.10 % maximum
Max. Wiper Current @ 5K ohms ...........................................................20 mA .....................................................................10 mA
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level ...........................................................................................1,000 VAC minimum ..............................................1,000 VAC minimum
Insulation Resistance (500 VDC) ..........................................................1,000 megohms minimum ......................................1,000 megohms minimum
Resolution..............................................................................................See How to Order chart ........................................ Essentially in nite
Power Rating (Voltage Limited By Power Dissipation)
+70 C ................................................................................................2 watts ....................................................................2 watts
+125 C ..............................................................................................0 watt ......................................................................0 watt
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Environmental Characteristics
Operating Temperature Range
Dynamic .............................................................................................-40 C to +125 C ...................................................-40 C to +125 C
Static ..................................................................................................-55 C to +125 C ...................................................-55 C to +125 C
Temperature Coef cient (Over Static Temperature Range) ..................50 ppm/C ............................................................100 ppm/C
Temperature Cycling (5 Cycles Over Static Temperature Range) .........2 % TR shift max. .................................................4 % TR shift max.
Vibration (15 Gs, 10 Hz to 2 kHz)
Wiper Bounce ....................................................................................0.1 ms max. ............................................................0.1 ms max.
Shock (100 Gs, 6 ms sawtooth)
Wiper Bounce ....................................................................................0.1 ms max. ............................................................0.1 ms max.
Load Life (1,000 hours @ 70 C) ...........................................................2 % TR shift ..........................................................5 % TR shift max.
Rotational Life
No Load or Powered ..........................................................................2,000,000 shaft revolutions ....................................5,000,000 shaft revolutions
No Load or Powered (Dual Ball Bearing) ..........................................N/A .........................................................................10,000,000 shaft revolutions
Moisture Resistance (Mil-Std-202, Method 103) ...................................2 % TR shift max. .................................................5 % TR shift max.
IP Rating ................................................................................................IP 50 .......................................................................IP 50
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Mechanical Characteristics
Mechanical Angle ...........................................................................................................................................................................................3600 +10 , -0
Backlash ....................................................................................................................................................................................................................1.0 max.
Stop Strength.......................................................................................................................................................................................53 N-cm (75 oz-in.) min.
Torque
Starting ........................................................................................................................................................................................0.5 N-cm (0.7 oz.-in.) max.
Running .......................................................................................................................................................................................0.5 N-cm (0.7 oz.-in.) max.
Clutch................................................................................................................................................................................1.0 to 4.2 N-cm (1.5 to 6.0 oz.-in.)
Mounting .......................................................................................................................................................................... 170-200 N-cm (15-18 in.-lb.) max.
Shaft Runout T.I.R. ..................................................................................................................................................................................... 0.08 mm (0.003 in.)
Lateral Runout T.I.R. ................................................................................................................................................................................... 0.13 mm (0.005 in.)
Shaft End Play T.I.R. .................................................................................................................................................................................. 0.15 mm (0.006 in.)
Shaft Radial Play T.I.R. ............................................................................................................................................................................... 0.08 mm (0.003 in.)
Pilot Diameter Runout T.I.R. ....................................................................................................................................................................... 0.08 mm (0.003 in.)
Weight
Single ...................................................................................................................................................................................................... 20 gm (0.7 oz.) typ.
Dual ....................................................................................................................................................................................................... 36 gm (1.27 oz) typ.
Shaft Side Load (Max. Allowable)
Nickel Plated Brass Shaft w/Brass Bushing ................................................................................................................................................. 50 gmf (1.7 ozf)
Stainless Steel Shaft w/Bronze Bushing .................................................................................................................................................... 250 gmf (8.8 ozf)
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 ux, 260 C (500 F) max. for 5 seconds
Wash processes .......................................................................................................................................................................................Not recommended
Mounting Hardware ............................................................................................. One lockwasher and one mounting nut is shipped with each potentiometer
Recommended Panel Thickness (Bushing Mount) ..................................................................................................................2.46-3.81 mm (0.097-0.150 in.)
Marking ...........................................................................................................................Manufacturers symbol, model number, product code and date code
Standard Packaging ...........................................................................................................................................................................Plastic trays (5 pcs./tray)
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At room ambient: +25 C nominal and 50 % relative humidity nominal, except as noted.
For other options, please consult factory.
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Speci cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their speci c applications.
*RoHS COMPLIANT 3549 - 10-Turn Precision Potentiometer
Product Dimensions
Single Gang, Bushing Mount Dual Gang, Bushing Mount
40.259 0.762
18.446 0.381
MOUNTING SURFACE
(1.585 .030)
(.726 .015)
39.243 0.762
14.046 0.381
(1.545 .030)
34.798 0.762
(.553 .015)
(1.370 .030)
5.715 0.381
26.467 0.762
(.225 .015)
(1.042 .030)
18.796 0.381
10.287 + 0.00/-0.05
2 1 3
(.740 .015)
(.405 +0.00/-.002)
14.351 0.381
(.565 .015)
BUSHING TYPE B
0.762
R 6.02 0.381
(.030) SHAFT
(.237 .015)
DIMENSION
2 1 3 2 1 3
A
10.287 + 0.00/-0.05
ADJUSTMENT SLOT:
(.405 +0.00/-.002)
0.813 0.813
WIDE X DEEP
(.032) (.032) BUSHING TYPE B
SHAFT DIMENSION A
1.524 0.254
(.060 .010)
7.92 0.381
(.312 .015)
19.812 0.812 20.617 0.787
(.780 .032) (.812 .031)
1.52
7.92 0.381
(.060)
30 5
(.312 .015)
6.86 0.25
OPTIONAL MOUNTING SURFACE
20.643 0.787
16.256
ANTI- (.270 .010)
R
(.813 .031)
(.640)
ROTATIONAL
0.813 0.813 .0004
PIN MAX.
ADJ. SLOT: WIDE X DEEP
(.032) (.032 .010)
12.7 0.254
(.500 .010)
30 5
OPTIONAL 6.86 0.25
16.256
ANTI- (.270 .010)
R
ROTATIONAL (.640)
1.524 +.000/-0.127 PIN MAX.
(.060 +.000/-.005)
DIA.
12.7 0.254
(.500 .010)
DIA.
1.016 OPTIONAL
12.649 0.254
ANTI-ROTATIONAL
(.040)
(.498 .010)
PIN
22.479 0.812
MOUNTING FACE
DIA.
(.885 .032) 1.524 +.000/-0.127
(.060 +.000/-.005)
DIA.
WIPER
2
DIA.
CCW 3 CW
1 1.016 OPTIONAL
12.649 0.254
ANTI-ROTATIONAL
(.040)
CLOCKWISE (.498 .010)
PIN
22.479 0.812
MOUNTING FACE
DIA.
(.885 .032)
TOLERANCES: EXCEPT WHERE NOTED
.50 .127 .0127
DECIMALS: .XX .XXX .XXXX
(.02) (.005) (.0005)
MM
DIMENSIONS:
(IN) CCW CW
3
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Bushing
Selection
WIPER
2 2
Code Shaft Dimension Shaft Material Bushing Type Bushing Material
6.34 +0/-0.022
A Nickel Plated Brass 3/8 32-UNEF- 2A THD. Brass
(0.2497 +0/-0.0009)
CW
CCW 3
6.00 +0/-0.022 1
B Nickel Plated Brass M9 X 0.75-8g Brass
(0.2362 +0/-0.0009)
CLOCKWISE
6.34 +0/-0.007
C Stainless Steel 3/8 32-UNEF- 2A THD. Bronze
(0.2497 +0/-0.0003)
6.00 +0/-0.007
D Stainless Steel M9 X 0.75-8g Bronze
(0.2362 +0/-0.0003)
6.34 +0/-0.007
G Stainless Steel 3/8 32-UNEF- 2A THD. Bronze
(0.2497 +0/-0.0003)
6.00 +0/-0.007
H Stainless Steel M9 X 0.75-8g Bronze
(0.2362 +0/-0.0003)
Speci cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their speci c applications.