BOURNS 3339 Service Manual
Features
4.57
(.180)
1
3
8.13 ± .38
(.320 ± .015)
2.54
(.100)
2.54
(.100)
5.08
(.200)
1
3
CW
CLOCKWISE
CCW
2
WIPER
*RoHS COMPLIANT
VERSIONS
AVAILABLE
■ Four-Turn / Cermet / Industrial / Sealed
■ Unique planetary drive offers precise
wiper setting of a multiturn in a
single-turn package size
■ Top and side adjust styles
■ RoHS compliant* version available
3339 - 5/16 ” Round Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range
Resistance Tolerance ............±10 % std.
Absolute Minimum Resistance
Contact Resistance Variation
Adjustability
Voltage....................................±0.05 %
Resistance ................................±0.1 %
Resolution.....................................Infinite
Insulation Resistance ................500 vdc.
Dielectric Strength
Sea Level .................................600 vac
80,000 Feet ..............................250 vac
Effective Travel....................4 turns nom.
Environmental Characteristics
Power Rating (300 volts max.)
85 °C........................................0.5 watt
150 °C.........................................0 watt
Temperature Range
.................................-55 °C to +150 °C
Temperature Coefficient
........................................±10 0ppm/°C
Seal Test........................85 °C Fluorinert
Humidity........MIL-STD-202 Method 103
Vibration.........30 G (1 % ∆TR; 1 % ∆VR)
Shock...........100 G (1 % ∆TR; 1 % ∆VR)
Load Life
..............1,000 hours 0.5 watt @ 85 °C
Rotational Life ........................200 cycles
Physical Characteristics
Torque ................................3 oz-in. max.
Mechanical Stops..................Wiper idles
Terminals ........................Solderable pins
Weight ........................................0.02 oz.
Marking ...........................Manufacturer’s
Wiper................50 % (Actual TR) ±10 %
Flammability ............................U.L.94V-0
Standard Packaging .....50 pcs. per tube
Adjustment Tool ..............................H-90
...................................10 to 1 megohm
(see standard resistance table)
(tighter tolerance available)
.............................1 % or 2 ohms max.
(whichever is greater)
.............................3 % or 3 ohms max.
(whichever is greater)
1,000 megohms min.
96 hours
(3 % ∆TR, 10 Megohms IR)
(3 % ∆TR; 3 % or 3 ohms,
whichever is greater, CRV)
(3 % ∆TR; 3 % or 3 ohms,
whichever is greater, CRV)
trademark, resistance code,
wiring diagram, date
code, manufacturer’s
model number and style
3339H
Common Dimensions
(Top Adjust)
4.78
MIN.
(.188)
6.35
(.250)
7.62
DIA.
DIA.
(.020)
.43 ± .05
(.017 ± .002)
7.62
(.300)
3339P
6.35
(.250)
(.300)
3339S
Common Dimensions (Side Adjust)
7.62
(.300)
DIA.
†
.64
(.025)
8.13 ± .38
(.320 ± .015)
3339W
.64
(.025)
.51
DIA.
.51
(.020)
ADJ. CROSS SLOT
2.54 ± .025
(.10 ± .01)
(.100)
2.54
(.100)
8.00 ± .38
(.315 ± .015)
9.53 ± .38
(375 ± .015)
5.54 ± .38
(.218 ± .015)
.38
MIN.
(.015)
1
2.54
(.100)
5.08
(.200)
8.00 ± .38
(.315 ± .015)
9.53 ± .38
(375 ± .015)
5.54 ± .38
(.218 ± .015)
.38
MIN.
(.015)
2.54
LONG X
(.100)
.64
WIDE X
(2 PLACES)
DEEP X
90° ± 1°
2
2
2
.38
(.015)
REF.
3
2.54 ± .025
(.10 ± .01)
2.54
(.100)
3
5.97
(.235)
.43 ± .05
2
(.017 ± .002)
DIA.
4.57
(.180)
3
2.54
(.100)
5.97
(.235)
Customers should verify actual device performance in their specific applications.
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
DIMENSIONS ARE:
How To Order
3339 H - 1 - 103 LF
Model
Style
Standard or Modified
Product Indicator
-1 = Standard Product
Resistance Code
Terminations
LF = 100 % Tin-plated (RoHS compliant)
Blank = 90 % Tin / 10 % Lead-plated
Consult factory for other available options.
(Standard)
Standard Resistance Table
Resistance Resistance
(Ohms) Code
10 100
20 200
50 500
100 101
200 201
500 501
1,000 102
2,000 202
5,000 502
10,000 103
20,000 203
25,000 253
50,000 503
100,000 104
200,000 204
250,000 254
500,000 504
1,000,000 105
Popular distribution resistance values listed in
boldface. Special resistances available.
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
†“Fluorinert” is a registered trademark of 3M Co.
Specifications are subject to change without notice.
2.54
1
(.025)
.76
(.030)
1
MM
(INCHES)
REV. 09/04
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