Features
■ Repeatable settings
■ Resolution to 0.001 %
■ Digital display provides excellent
readability
■ Snap-in panel mount
3680 Family - Precision Potentiometer
Electrical Characteristics1
Product Dimensions
Standard Resistance Range .............................................................................10 ohms to 1 megohm
Total Resistance Tolerance ...........................................................................................................±± ꢀ
Dielectric Withstanding Voltage (MIL-STD-202, Method ±01)
3680
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
±681 ..........................................................................................................................................10 ꢀ
±682 ............................................................................................................................................1 ꢀ
±68± .........................................................................................................................................0.1 ꢀ
±684 .......................................................................................................................................0.01 ꢀ
±685 .....................................................................................................................................0.001 ꢀ
Absolute Minimum Resistance...............................± ohms or 0.2 ꢀ maximum (whichever is greater)
Accuracy (Dial Reading to Output Ratio)....................................................................±1.0 ꢀ ꢁull scale
3
1
2
Environmental Characteristics1
Operating Temperature Range ...................................................................................-25 °C to +85 °C
Storage Temperature Range.......................................................................................-25 °C to +85 °C
Temperature Coeꢁꢁicient Over Storage Temperature Range...........................±100 ppmꢂ°C maximum
Vibration .........................................................................................................................................10 G
Wiper Bounce...........................................................................................0.1 millisecond maximum
Total Resistance Shiꢁt ..............................................................................................±1 ꢀ maximum
Voltage Ratio Shiꢁt ................................................................................................±0.2 ꢀ maximum
Shock .............................................................................................................................................50 G
Wiper Bounce...........................................................................................0.1 millisecond maximum
Total Resistance Shiꢁt ..............................................................................................±1 ꢀ maximum
Voltage Ratio Shiꢁt ................................................................................................±0.2 ꢀ maximum
Load Liꢁe...............................................................................................................1,000 hours, 2 watts
Total Resistance Shiꢁt ..............................................................................................±2 ꢀ maximum
Rotational Liꢁe .........................................................................75,000 button operations each decade
Total Resistance Shiꢁt ..............................................................................................±2 ꢀ maximum
IP Rating........................................................................................................................................IP 40
c
d
b
Mechanical Characteristics1
7.77 ± .38
(.306 ± .015)
Weight....................................±681 (9 gm); ±682 (16 gm); ±68± (2± gm); ±684 (±0 gm); ±685 (±7 gm)
Terminals.....2.79 mm (0.11 in.) wide x .41 mm (.016 in.) thick, tinned solder lugs ꢁor ± #20 AWG wires
Soldering Condition
7.87
(.31)
Manual Soldering..........................................................96.5Snꢂ±.0Agꢂ0.5Cu solid wire or no-clean
rosin cored wire; ±70 °C (700 °F) max. ꢁor ± seconds
e
Wave Soldering....................96.5Snꢂ±.0Agꢂ0.5Cu solder with no-clean ꢁlux; 260 °C (500 °F) max.
ꢁor 5 seconds
23.62
(.93)
Wash processes..................................................................................................Not recommended
Marking...............................Manuꢁacturer’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
20.57
(.810)
8.38 ± .38
(.33 ± .015)
PANEL
.81
MIN.
1At 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.
(.032)
3.18
3.18
MAX.
(.125)
(.125)
Product Dimensions
26.67
(1.050)
Dimensions
c
Weight (Approx.)
TOLERANCES: EXCEPT WHERE NOTED
Model
a
b
d
e –.381 (–.015)
oz.
gms.
.38
(.015)
.13
(.005)
DECIMALS: .XX ±
.XXX ±
±681
±682
±68±
±684
±685
16.51 (.650)
26.67 (1.05)
±7.08 (1.46)
47.50 (1.87)
57.66 (2.270)
14.99 (.590)
25.15 (.99)
±5.±1 (1.±9)
45.47 (1.79)
55.6± (2.190)
—
9.91 (.±9)
11.94 (.47)
11.94 (.47)
11.94 (.47)
11.94 (.47)
4.19 (.165)
8.±8 (.±±0)
4.19 (.165)
8.±8 (.±±0)
4.19 (.165)
.±±6
.576
.824
1.072
1.±20
9.5
16.5
2±.5
±0.5
±7.5
FRACTIONS: ±1/64
MM
DIMENSIONS:
(IN.)
10.67 (.42)
18.54 (.7±)
±0.7± (1.21)
±9.12 (1.540)
WIPER
2
Dimensions
Model
RECOMMENDED
PANEL CUTOUT
f –.010 (–.254)
g –.010 (–.254)
3
1
f
±681
±682
±68±
±684
±685
21.08 (.8±0)
21.08 (.8±0)
21.08 (.8±0)
21.08 (.8±0)
21.08 (.8±0)
15.75 (.620)
25.91 (1.020)
±6.07 (1.420)
46.2± (1.820)
56.±9 (2.220)
INCR.
g
.76
(.03)
R MAX.
*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.
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