PL
IA
NT
Features
■
Wirewound and Hybritron
®
elements
■
High rotational life
■
Optional 0.15 % 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
*R
oH
S
CO
M
3548 - 5-Turn Precision Potentiometer
Electrical Characteristics
1
Wirewound Element
Hybritron
®
Element
Standard Resistance Range..................................................................500 to 50K ohms ....................................................1K to 10K ohms
Total Resistance Tolerance....................................................................±3 % .......................................................................±10 %
Independent Linearity ............................................................................±0.25 % ..................................................................±0.25 %
Independent Linearity (Maximum Practical) ..........................................±0.15 % ..................................................................±0.15 %
Effective Electrical Angle .......................................................................1800 ° +10 °, -0 °....................................................1800 ° +10 °, -0 °
Absolute Minimum Resistance/End Voltage ..........................................1 ohm or 0.1 % maximum ......................................0.4 % 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 infinite
Power Rating (Voltage Limited By Power Dissipation)
+70 °C................................................................................................1.5 watts .................................................................1.5 watts
+125 °C..............................................................................................0 watt......................................................................0 watt
Environmental Characteristics
1
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 Coefficient (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 .............................................................................................1,000,000 shaft revolutions ...................................2,500,000 shaft revolutions
Powered (MIL-PRF-12934)................................................................1,000,000 shaft revolutions ...................................2,500,000 shaft revolutions
Moisture Resistance (Mil-Std-202, Method 103) ...................................±2 % TR shift max. .................................................±5 % TR shift max.
IP Rating ................................................................................................IP 50 .......................................................................IP 50
Mechanical Characteristics
1
Mechanical Angle ...........................................................................................................................................................................................1800 ° +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 .................................................................................................................................................................................................... 19 gm (0.67 oz.) typ.
Dual ..................................................................................................................................................................................................... 35 gm. (1.23 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 flux, 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)
1
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.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
3548 - 5-Turn Precision Potentiometer
Panel Thickness Dimensions
(For Bushing Mount Only)
2.46 - 3.81
(.097 - .150)
How To Order
3
5 4 8 S
-
2 A A -
1
0 3
/
1
0 3 A
PANEL
HEX NUT
MODEL DESIGNATOR
Code Description
3548 5-Turn
ELEMENT TYPE
Code Description
H
Hybritron®
S
Wirewound
NO. OF SECTIONS
Code Description
1
Single
2
Dual
ANTI-ROTATION LUG
Code Description
A
None
B
180
°
INDEPENDENT LINEARITY
Code Description
A
0.25 %
B
0.15 %
LOCKWASHER
POT
10.44 ± .07
DIA.
(.411 ± .003)
* Anti-rotation lug is not available for
servo mount versions.
RESISTANCE**
Code
Element Type
102 (1K ohms)
Hybritron®
502 (5K ohms)
Hybritron®
103 (10K ohms) Hybritron®
201 (200 ohms) Wirewound
501 (500 ohms) Wirewound
102 (1K ohms)
Wirewound
202 (2K ohms)
Wirewound
502 (5K ohms)
Wirewound
103 (10K ohms) Wirewound
203 (20K ohms) Wirewound
503 (50K ohms) Wirewound
Resolution
—
—
—
0.069
0.054
0.043
0.04
0.038
0.029
0.023
0.017
** For Single gang, use only first three digits.
For Dual gang, use six digits separated by a "/".
R
7.42
(.292)
BUSHING MOUNT
Code
A
B
C
D
G
H
Shaft FMS
13/16 "
20.6 mm
13/16 "
20.6 mm
13/16 "
20.6 mm
Shaft Dia.
1/4 "
6 mm
1/4 "
6 mm
1/4 "
6 mm
Shaft Material
Nickel Plated Brass
Nickel Plated Brass
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Bushing Dia.
3/8 "
9 mm
3/8 "
9 mm
3/8 "
9 mm
Bushing Material
Brass
Brass
Bronze
Bronze
Bronze
Bronze
Slip Clutch
N/A
N/A
N/A
N/A
Yes***
Yes***
ADDITIONAL HOLE FOR
ANTI-ROTATION PIN
1.60 +.08/-.03
DIA.
(.063 +.003/-.001)
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.
DIMENSIONS:
MM
(INCHES)
TOLERANCES: ±
0.127
(.005)
SERVO MOUNT
Code
E
Shaft FMS
3/8 "
Shaft Dia.
1/8 "
Shaft Material
Stainless Steel
*** Not available in dual gang version.
REV. 10/11
“Hybritron” is a registered trademark of Bourns, Inc.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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