Features
■ Repeatable settings
■ Resolution to 0.001 %
■ Digital display provides excellent readability
■ Snap-in panel mount
■ RoHS compliant*
3680 Family - Precision Potentiometer
1
Product Dimensions
Electrical Characteristics
3680
Standard Resistance Range.........................................................................................10 ohms to 1 megohm
Total Resistance Tolerance.......................................................................................................................±3 %
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
a
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
1
2
3
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
3
1
2
1
Environmental Characteristics
Operating Temperature Range.............................................................................................. -25 °C to +85 °C
Storage Temperature Range ................................................................................................. -25 °C to +85 °C
Temperature Coefficient 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
c
d
b
7.77 ± .38
1
(.306 ± .015)
Mechanical Characteristics
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
7.87
(.31)
e
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
23.62
(.93)
20.57
(.810)
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
8.38 ± .38
(.33 ± .015)
PANEL
.81
(.032)
MIN.
3.18
(.125)
3.18
(.125)
MAX.
26.67
(1.050)
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.
TOLERANCES: EXCEPT WHERE NOTED
.38
(.015)
.13
(.005)
Product Dimensions
DECIMALS: .XX ±
.XXX ±
FRACTIONS: ±1/64
MM
DIMENSIONS:
(IN.)
Dimensions
c
Weight (Approx.)
Model
a
b
d
e ±.38ꢀ (±.0ꢀꢁ)
oz.
gms.
3681
3682
3683
3684
3685
16.51 (.650)
26.67 (1.05)
37.08 (1.46)
47.50 (1.87)
57.66 (2.270)
14.99 (.590)
25.15 (.99)
35.31 (1.39)
45.47 (1.79)
55.63 (2.190)
—
9.91 (.39)
11.94 (.47)
11.94 (.47)
11.94 (.47)
11.94 (.47)
4.19 (.165)
8.38 (.330)
4.19 (.165)
8.38 (.330)
4.19 (.165)
.336
.576
.824
1.072
1.320
9.5
10.67 (.42)
18.54 (.73)
30.73 (1.21)
39.12 (1.540)
16.5
23.5
30.5
37.5
WIPER
2
3
1
INCR.
Dimensions
Model
f ±.0ꢀ0 (±.±ꢁ2)
g ±.0ꢀ0 (±.±ꢁ2)
RECOMMENDED
PANEL CUTOUT
f
3681
3682
3683
3684
3685
21.08 (.830)
21.08 (.830)
21.08 (.830)
21.08 (.830)
21.08 (.830)
15.75 (.620)
25.91 (1.020)
36.07 (1.420)
46.23 (1.820)
56.39 (2.220)
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
g
.76
(.03)
R MAX.
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
Specifications are subject to change without notice. Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
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