3547S-2AA-102/102B - Bourns, Inc.

Features

■ Wirewound and Hybritron® elements

■ High rotational life

■ Optional 0.20 % linearity

■ Optional A/R lug

■ RoHS compliant*

■ Suitable for use under side load

■ Designed for HMI and MMI applications

■ Dual gang option

■ Servo mount option

3547 - 3-Turn Precision Potentiometer

*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.

Speciﬁ cations are subject to change without notice.

Customers should verify actual device performance in their speciﬁ c applications.

Electrical Characteristics1 Wirewound Element Hybritron® Element

Standard Resistance Range..................................................................1K to 50K ohms ......................................................1K to 10K ohms

Total Resistance Tolerance ....................................................................±3 % .......................................................................±10 %

Independent Linearity ............................................................................±0.25 % ..................................................................±0.25 %

Independent Linearity (Maximum Practical) ..........................................±0.20 % ..................................................................±0.20 %

Effective Electrical Angle .......................................................................1080 ° +10 °, -0 ° ....................................................1080 ° +10 °, -0 °

Absolute Minimum Resistance/End Voltage ..........................................1 ohm or 0.1 % maximum ......................................0.7 % maximum

(whichever is greater)

Noise/Output Smoothness ....................................................................100 ohms maximum ...............................................0.15 % 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 inﬁ nite

Power Rating (Voltage Limited By Power Dissipation)

+70 °C ................................................................................................1 watts ....................................................................1 watts

+125 °C ..............................................................................................0 watt ......................................................................0 watt

Environmental Characteristics1

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 Coefﬁ 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 max. .................................................±5 % TR shift max.

Rotational Life

No Load .............................................................................................750,000 shaft revolutions ......................................1,500,000 shaft revolutions

Powered (MIL-PRF-12934)................................................................600,000 shaft revolutions ......................................1,200,000 shaft revolutions

Moisture Resistance (Mil-Std-202, Method 103) ...................................±2 % TR shift max. .................................................±5 % TR shift max.

IP Rating ................................................................................................IP 50 .......................................................................IP 50

Mechanical Characteristics1

Mechanical Angle ...........................................................................................................................................................................................1080 ° +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 .................................................................................................................................................................................................... 18 gm (0.63 oz.) typ.

Dual ....................................................................................................................................................................................................... 34 gm. (1.2 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 ﬂ 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 ...........................................................................................................................Manufacturer’s symbol, model number, product code and date code

Standard Packaging ...........................................................................................................................................................................Plastic trays (5 pcs./tray)

1At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.

For other options, please consult factory.

*RoHS COMPLIANT

Speciﬁ cations are subject to change without notice.

Customers should verify actual device performance in their speciﬁ c applications.

3547 - 3-Turn Precision Potentiometer

Product Dimensions

Single Gang, Bushing Mount Dual Gang, Bushing Mount

30 ° ± 5 °

12.649 ± 0.254

(.498 ± .010)

MOUNTING FACE

16.256

(.640)

MAX.

DIA.

22.479 ± 0.812

(.885 ± .032)

DIA.

6.86 ± 0.25

(.270 ± .010)

1.52

(.060)

20.643 ± 0.787

(.813 ± .031)

7.92 ± 0.381

(.312 ± .015)

SHAFT DIMENSION “A”

10.287 + 0.00/-0.05

(.405 +0.00/-.002)

12.7 ± 0.254

(.500 ± .010)

6.02 ± 0.381

(.237 ± .015)

0.813

(.032)

14.351 ± 0.381

(.565 ± .015)

18.796 ± 0.381

(.740 ± .015)

MOUNTING SURFACE

BUSHING TYPE “B”

ADJ. SLOT:

WIDE X

0.813 ± .0004

(.032 ± .010) DEEP

1.499

(.059)

OPTIONAL ANTI-

ROTATIONAL PIN

AND

7.366

(.290) RADIUS

1.016

(.040)

FROM MOUNTING

SURFACE ON

26.467 ± 0.762

(1.042 ± .030)

34.798 ± 0.762

(1.370 ± .030)

39.243 ± 0.762

(1.545 ± .030)

40.259 ± 0.762

(1.585 ± .030)

22 11 33

13CW

CCW

13CW

CLOCKWISE

CCW

WIPER

2 2

30 ° ± 5 °

12.649 ± 0.254

(.498 ± .010)

MOUNTING FACE

16.256

(.640)

MAX.

DIA.

22.479 ± 0.812

(.885 ± .032)

19.812 ± 0.812

(.780 ± .032)

6.86 ± 0.25

(.270 ± .010)

1.524 ± 0.254

(.060 ± .010)

20.617 ± 0.787

(.812 ± .031)

7.92 ± 0.381

(.312 ± .015)

SHAFT DIMENSION “A”

10.287 + 0.00/-0.05

(.405 +0.00/-.002)

12.7 ± 0.254

(.500 ± .010)

5.715 ± 0.381

(.225 ± .015)

0.762

(.030)

0.813

(.032)

14.046 ± 0.381

(.553 ± .015)

18.446 ± 0.381

(.726 ± .015) MOUNTING SURFACE

BUSHING TYPE “B”

ADJUSTMENT SLOT:

WIDE X 0.813

(.032) DEEP

1.499

(.059)

OPTIONAL ANTI-

ROTATIONAL PIN

AND

7.366

(.290) RADIUS

1.016

(.040)

FROM MOUNTING

SURFACE ON

2 1 3

TOLERANCES: EXCEPT WHERE NOTED

DECIMALS: .XX ± .XXX ± .XXXX ±

DIMENSIONS:

13CW

CLOCKWISE

CCW

2WIPER

.50

(.02)

.127

(.005)

.0127

(.0005)

(IN)

Shaft Dimension "A"

6.34 +0/-0.022

(0.2497 +0/-0.0009)

6.00 +0/-0.022

(0.2362 +0/-0.0009)

6.34 +0/-0.007

(0.2497 +0/-0.0003)

6.00 +0/-0.007

(0.2362 +0/-0.0003)

6.34 +0/-0.007

(0.2497 +0/-0.0003)

6.00 +0/-0.007

(0.2362 +0/-0.0003)

Bushing

Selection

Code

Bushing Type "B"

3/8 " 32-UNEF- 2A THD.

M9 X 0.75-8g

3/8 " 32-UNEF- 2A THD.

M9 X 0.75-8g

3/8 " 32-UNEF- 2A THD.

M9 X 0.75-8g

Shaft Material

Nickel Plated Brass

Stainless Steel

Bushing Material

Brass

Bronze

Speciﬁ cations are subject to change without notice.

Customers should verify actual device performance in their speciﬁ c applications.

3547 - 3-Turn Precision Potentiometer

Product Dimensions

Single Gang, Servo Mount Dual Gang, Servo Mount

30 ° ± 5 °

16.256

(.640)

MAX.

22.225 ± 0.381

(.875 ± .015)

DIA.

25.222 ± 0.787

(.993 ± .031)

6.858 ± 0.254

(.270 ± .010)

1.575

(.062)

1.575

(.062)

1.575

(.062) 9.525 ± 0.787

(.375 ± .031)

3.1699 + .0000/-.0076

(.1248 + .0000/-.0003)

DIA.

15.8725 + .0000/-.0127

(.6249 +.0000/-.0005)

DIA.

17.526

(.690)

12.7 ± 0.254

(.500 ± .010)

11.13 ± 0.381

(.438 ± .015)

19.46 ± 0.381

(.766 ± .015)

23.86 ± 0.381

(.939 ± .015) MOUNTING SURFACE

2 1 3

30 ° ± 5 °

16.256

(.640)

MAX.

22.225 ± 0.381

(.875 ± .015)

DIA.

6.858 ± 0.254

(.270 ± .010)

1.575

(.062)

1.575

(.062)

1.575

(.062) 9.525 ± 0.787

(.375 ± .031)

3.1699 + .0000/-.0076

(.1248 + .0000/-.0003)

DIA.

15.8725 + .0000/-.0127

(.6249 +.0000/-.0005)

DIA.

17.526

(.690)

12.7 ± 0.254

(.500 ± .010)

11.43 ± 0.381

(.450 ± .015)

19.76 ± 0.381

(.778 ± .015)

24.206 ± 0.381

(.953 ± .015) MOUNTING SURFACE

22 11 33

31.88 ± 0.78

(1.255 ± .031)

40.21 ± 0.78

(1.583 ± .031)

44.65 ± 0.78

(1.758 ± .031)

45.67 ± 0.78

(1.798 ± .031)

13CW

CCW

13CW

CLOCKWISE

CCW

WIPER

2 2

TOLERANCES: EXCEPT WHERE NOTED

DECIMALS: .XX ± .XXX ± .XXXX ±

DIMENSIONS:

13CW

CLOCKWISE

CCW

2WIPER

.50

(.02)

.127

(.005)

.0127

(.0005)

(IN)

3547 - 3-Turn Precision Potentiometer

Panel Thickness Dimensions

(For Bushing Mount Only)

PANEL

POT

LOCKWASHER

HEX NUT

2.46 - 3.81

(.097 - .150)

1.60 +.08/-.03

(.063 +.003/-.001)

10.44 ± .07

(.411 ± .003) DIA.

DIA.

ADDITIONAL HOLE FOR

ANTI-ROTATION PIN

(INCHES)

DIMENSIONS:

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.

Panel thickness and hole diameters are

recommended for best fit. However, customers

may adjust the dimensions to suit their specific

application.

TOLERANCES: ±

7.42

(.292)

0.127

(.005)

How To Order

3547S-2AA-103/ 103A

Code

Description

Hybritron®

Wirewound

ELEMENT TYPE

Code

Description

None

180 °

ANTI-ROTATION LUG*

Code

3547

Description

3-Turn

MODEL DESIGNATOR

Code

Description

Single

Dual

NO. OF SECTIONS

Code

Description

0.25 %

0.20 %

INDEPENDENT LINEARITY

Code

Shaft FMS

13/16 "

20.6 mm

13/16 "

20.6 mm

13/16 "

20.6 mm

Shaft Material

Nickel Plated Brass

Stainless Steel

Shaft Dia.

1/4 "

6 mm

1/4 "

6 mm

1/4 "

6 mm

Bushing Dia.

3/8 "

9 mm

3/8 "

9 mm

3/8 "

9 mm

Bushing Material

Brass

Bronze

Slip Clutch

N/A

Yes***

BUSHING MOUNT

Code

Shaft FMS

3/8 "

Shaft Material

Stainless Steel

Shaft Dia.

1/8 "

SERVO MOUNT

Code Element Type

Hybritron®

Wirewound

Resolution

—

0.069

0.054

0.043

0.04

0.038

0.029

0.023

0.017

RESISTANCE**

102 (1K ohms)

502 (5K ohms)

103 (10K ohms)

201 (200 ohms)

501 (500 ohms)

102 (1K ohms)

202 (2K ohms)

502 (5K ohms)

103 (10K ohms)

203 (20K ohms)

503 (50K ohms)

** For Single gang, use only first three digits.

For Dual gang, use six digits separated by a "/".

* Anti-rotation lug is not available for

servo mount versions.

*** Not available in dual gang version.

“Hybritron” is a registered trademark of Bourns, Inc.

Speciﬁ cations are subject to change without notice.

Customers should verify actual device performance in their speciﬁ c applications.

REV. 10/11