3680
7.77 ± .38
(.306 ± .015)
1 2 3
2
3
1
a
c d
b
PANEL
e
8.38 ± .38
(.33 ± .015)
13
INCR.
2WIPER
7.87
(.31)
20.57
(.810)
23.62
(.93)
3.18
(.125)
MIN. .81
(.032)
MAX. 3.18
(.125)
26.67
(1.050)
TOLERANCES: EXCEPT WHERE NOTED
.38 .13
DECIMALS: .XX ± (.015) .XXX ± (.005)
FRACTIONS: ±1/64
MM
DIMENSIONS: (IN.)
Features
Repeatable settings
Resolution to 0.001 %
Digital display provides excellent readability
Snap-in panel mount
RoHS compliant*
3680 Family - Precision Potentiometer
*RoHS Directive 2002/95/EC Jan. 27, 2003 including
annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi 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 specifi c applications.
Electrical Characteristics1
Standard Resistance Range.........................................................................................10 ohms to 1 megohm
Total Resistance Tolerance .......................................................................................................................±3 %
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level ....................................................................................................................1,000 VAC minimum
Power Rating (Voltage Limited By Power Dissipation or 500 VAC, Whichever is Less)
+25 °C ............................................................................................................................................. 2 watts
+85 °C ................................................................................................................................................ 0 watt
Insulation Resistance (500 VDC) ........................................................................... 1,000 megohms minimum
Resolution
3681 .....................................................................................................................................................10 %
3682 .......................................................................................................................................................1 %
3683 ....................................................................................................................................................0.1 %
3684 ..................................................................................................................................................0.01 %
3685 ................................................................................................................................................0.001 %
Absolute Minimum Resistance .......................................... 3 ohms or 0.2 % maximum (whichever is greater)
Accuracy (Dial Reading to Output Ratio)................................................................................±1.0 % full scale
Environmental Characteristics1
Operating Temperature Range .............................................................................................. -25 °C to +85 °C
Storage Temperature Range ................................................................................................. -25 °C to +85 °C
Temperature Coeffi cient Over Storage Temperature Range ...................................... ±100 ppm/°C maximum
Vibration ...................................................................................................................................................10 G
Wiper Bounce ...................................................................................................... 0.1 millisecond maximum
Total Resistance Shift .......................................................................................................... ±1 % maximum
Voltage Ratio Shift ............................................................................................................ ±0.2 % maximum
Shock........................................................................................................................................................50 G
Wiper Bounce ...................................................................................................... 0.1 millisecond maximum
Total Resistance Shift .......................................................................................................... ±1 % maximum
Voltage Ratio Shift ............................................................................................................ ±0.2 % maximum
Load Life .......................................................................................................................... 1,000 hours, 2 watts
Total Resistance Shift .......................................................................................................... ±2 % maximum
Rotational Life..................................................................................... 75,000 button operations each decade
Total Resistance Shift .......................................................................................................... ±2 % maximum
IP Rating .................................................................................................................................................. IP 40
Mechanical Characteristics1
Weight .............................................3681 (9 gm); 3682 (16 gm); 3683 (23 gm); 3684 (30 gm); 3685 (37 gm)
Terminals ............................................................................ 2.79 mm (0.11 in.) wide x .41 mm (.016 in.) thick,
tinned solder lugs for 3 #20 AWG wires
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 date code.
Ganging (Multiple Section Potentiometers) ........................................................... Up to 5 decades maximum
Readout Marking ................................................................................................................... 10 positions, 0-9
Actuating Force .............................................................................................. 19 to 29 oz. on detent decades
Actuating Force Variation ........................................................................................................ 4 oz. maximum
1 At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
NOTE: Terminals 1 & 3 are reversed from illustration for models 3682 and 3684.
Product Dimensions
*RoHS COMPLIANT
Product Dimensions
Dimensions Weight (Approx.)
Model a b c d e ±.381 (±.015) oz. gms.
3681 16.51 (.650) 14.99 (.590) 9.91 (.39) 4.19 (.165) .336 9.5
3682 26.67 (1.05) 25.15 (.99) 10.67 (.42) 11.94 (.47) 8.38 (.330) .576 16.5
3683 37.08 (1.46) 35.31 (1.39) 18.54 (.73) 11.94 (.47) 4.19 (.165) .824 23.5
3684 47.50 (1.87) 45.47 (1.79) 30.73 (1.21) 11.94 (.47) 8.38 (.330) 1.072 30.5
3685 57.66 (2.270) 55.63 (2.190) 39.12 (1.540) 11.94 (.47) 4.19 (.165) 1.320 37.5
Dimensions
Model f ±.010 (±.254) g ±.010 (±.254)
3681 21.08 (.830) 15.75 (.620)
3682 21.08 (.830) 25.91 (1.020)
3683 21.08 (.830) 36.07 (1.420)
3684 21.08 (.830) 46.23 (1.820)
3685 21.08 (.830) 56.39 (2.220)
RECOMMENDED
PANEL CUTOUT f
g .76
(.03) R MAX.
BOURNS‘
3680 Family - Precision Potentiometer
Recommended Part Numbers
Specifi 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 specifi c applications.
REV. 09/13
Resistance 3681S-1 3682S-1 3683S-1 3684S-1 3685S-1
(Ω) 1 2 3 4 5
Decade Decade Decade Decade Decade
50 -500L
100 -101L
200 -201L
500 -501L -501L
1,000 -102L -102L -102L
2,000 -202L -202L -202L
5,000 -502L -502L -502L
10 K -103L -103L -103L -103L
20 K -203L -203L -203L
50 K -503L -503L -503L
100 K -104L -104L -104L -104L -104L
500 K -504L -504L -504L
1 Meg -105L -105L -105L -105L
BOLDFACE LISTINGS ARE IN STOCK AND READILY
AVAILABLE THROUGH DISTRIBUTION.
FOR OTHER OPTIONS CONSULT FACTORY.
ROHS IDENTIFIER:
L = COMPLIANT