M
PL
IA
N
T
Features
■
Repeatable settings
■
Resolution to 0.001 %
■
Digital display provides excellent readability
■
Snap-in panel mount
■
RoHS compliant*
*R
oH
S
CO
3680 Family - Precision Potentiometer
Electrical Characteristics
1
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
Product Dimensions
3680
a
1
2
3
3
2
1
Environmental Characteristics
1
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
b
d
Mechanical Characteristics
1
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 flux; 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.
7.87
(.31)
e
20.57
(.810)
7.77
±
.38
(.306
±
.015)
23.62
(.93)
8.38
±
.38
(.33
±
.015)
PANEL
.81
(.032)
3.18
MAX.
(.125)
MIN.
26.67
(1.050)
3.18
(.125)
Product Dimensions
Dimensions
Model
3681
3682
3683
3684
3685
a
16.51 (.650)
26.67 (1.05)
37.08 (1.46)
47.50 (1.87)
57.66 (2.270)
b
14.99 (.590)
25.15 (.99)
35.31 (1.39)
45.47 (1.79)
55.63 (2.190)
c
—
10.67 (.42)
18.54 (.73)
30.73 (1.21)
39.12 (1.540)
d
9.91 (.39)
11.94 (.47)
11.94 (.47)
11.94 (.47)
11.94 (.47)
e ±.381 (±.015)
4.19 (.165)
8.38 (.330)
4.19 (.165)
8.38 (.330)
4.19 (.165)
Weight (Approx.)
oz.
.336
.576
.824
1.072
1.320
gms.
9.5
16.5
23.5
30.5
37.5
TOLERANCES: EXCEPT WHERE NOTED
.38
.13
DECIMALS: .XX
±
.XXX
±
(.015)
(.005)
FRACTIONS:
±1/64
MM
DIMENSIONS:
(IN.)
2
1
INCR.
WIPER
3
Dimensions
Model
3681
3682
3683
3684
3685
f ±.010 (±.254)
21.08 (.830)
21.08 (.830)
21.08 (.830)
21.08 (.830)
21.08 (.830)
g ±.010 (±.254)
15.75 (.620)
25.91 (1.020)
36.07 (1.420)
46.23 (1.820)
56.39 (2.220)
RECOMMENDED
PANEL CUTOUT
f
g
.76
R MAX.
(.03)
*RoHS Directive 2002/95/EC Jan. 27, 2003 including
annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications 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 specific applications.
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