AV
DI TH AIL
ST RO AB
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BU GH
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ON
Features
s
s
s
s
s
s
Single-Turn / Carbon / Commercial
Open Frame
Cross slot rotor design suitable for
automatic adjustment equipment
Board retention feature
Enclosed cover
PC board stand-offs
Adjustable front/back, top/bottom
3318 - 6mm Square Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range
.................................100 to 1 megohm
(see standard resistance table)
Resistance Tolerance ....................±30%
Contact Resistance Variation
.............................................10% max.
Resolution.....................................Infinite
Adjustment Angle....................210° ±20°
Environmental Characteristics
Power Rating
100-500K ohms..............................50V
>500K ohms ...................................25V
50°C.........................................0.1 watt
Temperature Range ......-25°C to +100°C
Temperature Coefficient ...±1000ppm/°C
Load Life ...1,000 hours 0.1 watt @ 70°C
(20%
∆TR)
Physical Characteristics
Torque (Operating)..............20-250 g-cm
Stop Strength
Knob Side .............................750 g-cm
Reverse Side .........................350g-cm
Terminals ........................Solderable pins
Marking ......Resistance code, date code
Standard Packaging ....200 pcs. per bag
Adjustment Tool ..............................H-90
Aqueous cleaning not recommended
How To Order
3318K
FRONT VIEW
6.40
(.252)
0.80
±
0.10
(.031
±
.004)
2
3.20
(.126)
3.50
(.138)
1
1
0.80
±
0.10
(.031
±
.004)
2.50
(.098)
2
3
1.20
(.047)
3
0.30
(.012)
3318F
FRONT VIEW
6.40
(.252)
0.80
±
0.10
(.031
±
.004)
2.50
(.098)
0.75
(.030)
4.65
(.183)
1.20
(.047)
3.20
DIA.
(.126)
8.00
(.315)
0.75
(.030)
6.35
(.250)
3.50
±
0.50
(.138
±
.020)
1.70
(.067)
MOUNTING
SURFACE
3.20 DIA.
(.126)
1.70
(.067)
MOUNTING
SURFACE
1.85
(.073)
0.75
(.030)
4.50
(.177)
0.40
(.016)
0.75
(.030)
2.00
±
0.10
(.079
±
.004)
3.80
(.150)
REAR VIEW
DIA.
0.80
±
0.10
(.031
±
.004)
3318 K - 1 - 103
Model
Style
Standard Product
Resistance Code
REAR VIEW
2.00
±
0.10
DIA.
(.079
±
.004)
0.60
(.024)
4.65
(.183)
0.60
(.024)
Standard Resistance Table
Resistance
(Ohms)
100
200
500
1,000
2,000
5,000
10,000
20,000
50,000
100,000
200,000
500,000
1,000,000
Popular values listed in boldface.
SHADED AREAS TYPICALLY NOT STOCKED BY
DISTRIBUTORS AND NOT RECOMMENDED FOR NEW
DESIGNS.
Resistance
Code
101
201
501
102
202
502
103
203
503
104
204
504
105
ADJUSTING
DIRECTION
SUGGESTED PWB LAYOUT
1.00 + 0.10 DIA.
(.039
±
.004)
5.00
(.197)
SUGGESTED PWB LAYOUT
2.50
(.098)
1.00 + 0.10
DIA.
(.039 + .004) 3 PLACES
5.00
(.197)
5.00
(.197)
2
CCW
WIPER
1
CLOCKWISE
3
CW
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
DIMENSIONS ARE:
METRIC
(INCHES)
44
Specifications are subject to change without notice.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
