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3299 Datasheet

3/8 Square Trimming Potentiometer

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Features
3/8 ” Square/ Multiturn / Cermet /
Industrial / Sealed
Five popular terminal styles
Standoffs
Patent #4427966 drive mechanism
RoHS compliant* version available
3299 - 3/8 ” Square Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range
..................................10 to 2 megohms
(see standard resistance table)
Resistance Tolerance ............±10 % std.
(tighter tolerance available)
Absolute Minimum Resistance
..............................1 % or 2 ohms max.
(whichever is greater)
Contact Resistance Variation
...........................1.0 % or 3 ohms max.
(whichever is greater)
Adjustability
Voltage.....................................±0.01 %
Resistance ...............................±0.05 %
Resolution.....................................Infinite
Insulation Resistance ................500 vdc.
1,000 megohms min.
Dielectric Strength
Sea Level ..................................900 vac
70,000 Feet...............................350 vac
Effective Travel..................25 turns nom.
Environmental Characteristics
Power Rating (300 volts max.)
70 °C ........................................0.5 watt
125 °C .........................................0 watt
Temperature Range ....-55 °C to +125 °C
Temperature Coefficient ....±100 ppm/°C
Seal Test........................85 °C Fluorinert
Humidity........MIL-STD-202 Method 103
96 hours
(2 % TR, 10 Megohms IR)
Vibration.........20 G (1 % TR; 1 % VR)
Shock...........100 G (1 % TR; 1 % VR)
Load Life
................1,000 hours 0.5 watt @ 70 °C
(3 % TR; 3 % or 3 ohms,
whichever is greater, CRV)
Rotational Life ........................200 cycles
(4 % TR; 3 % or 3 ohms,
whichever is greater, CRV)
Physical Characteristics
Torque .............................3.0 oz-in. max.
Mechanical Stops..................Wiper idles
Terminals ........................Solderable pins
Weight ......................................0.035 oz.
Marking ...........................Manufacturer’s
trademark, resistance code,
wiring diagram, date code,
manufacturer’s model
number and style
Wiper................50 % (Actual TR) ±10 %
Flammability ..........................U.L. 94V-0
Standard Packaging .....50 pcs. per tube
Adjustment Tool ..............................H-90
3299P
Common Dimensions
.38
(.015)
1.09
(.043)
1.12
9.53 (.044)
(.375)
2.54
(.100)
2.54
(.100)
1.52
(.060)
10.03
(.395)
3
ADJ. SLOT
2.29 DIA.
2
1
(.090)
X
.56
(.022)
WIDE
X
.64
(.025)
DEEP
2.54
(.100)
6.22 ± 1.14
(.245 ± .045)
6.10 +.30/-.25
(.240 +.012/-.010)
.51
(.020)
DIA.
TYP.
5.23
(.206)
BOTTOM VIEW
3299W
2.54
(.100)
1.91
(.075)
3
2
1
3299X
2.54
(.100)
MIN.
2.54 2.54
(.100) (.100)
BOTTOM VIEW
1.91
(.075)
3
2
1
BOTTOM VIEW
3299Y
2.54 2.54
(.100) (.100)
1.91
(.075)
3
2
1
2.54
(.100)
BOTTOM VIEW
3299Z
2.54
(.100)
2.54
(.100)
1.91
(.075)
3
2
1
2.54
(.100)
BOTTOM VIEW
2 WIPER
CCW 1
CLOCKWISE
3 CW
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
DIMENSIONS ARE:
MM
(INCHES)
*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.
Customers should verify actual device performance in their specific applications.
Standard Resistance Table
Resistance
(Ohms)
10
20
50
100
200
500
1,000
2,000
5,000
10,000
20,000
25,000
50,000
100,000
200,000
250,000
500,000
1,000,000
2,000,000
Resistance
Code
100
200
500
101
201
501
102
202
502
103
203
253
503
104
204
254
504
105
205
Popular distribution resistance values listed in
boldface. Special resistances available.
How To Order
3299 W - 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
(Standard)
Consult factory for other available options.
REV. 09/04


Part Number 3299
Description 3/8 Square Trimming Potentiometer
Maker Bourns Electronic
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3299 Datasheet PDF





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