*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.
3299 -
3/8 ” Square Trimming Potentiometer
Features
■ 3/8 ” Square/ Multiturn / Cermet /
Industrial / Sealed
■ Five popular terminal styles
■ Standoffs
■ Patent #4427966 drive mechanism
■ RoHS compliant* version available
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
1.52
(.060)
3
2
1
BOTTOM VIEW
BOTTOM VIEW
BOTTOM VIEW
BOTTOM VIEW
BOTTOM VIEW
3299P
Common Dimensions
1.09
(.043)
6.10 +.30/-.25
(.240 +.012/-.010)
3299W
1.91
(.075)
2
3
1
3299X
2
3
1
3299Y
2
3
1
3299Z
2
3
1
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
1.91
(.075)
1.91
(.075)
1.91
(.075)
2.54
(.100)
MIN.
2.54
(.100)
2.54
(.100)
2.54
(.100)
.51
(.020)
DIA. TYP.
5.23
(.206)
10.03
(.395)
.38
(.015)
9.53
(.375)
1.12
(.044)
6.22 ± 1.14
(.245 ± .045)
ADJ. SLOT
2.29
(.090)
.56
(.022)
.64
(.025)
WIDE
X
X
DEEP
DIA.
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.
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
2,000,000 205
Standard Resistance Table
DIMENSIONS ARE:
MM
(INCHES)
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
Popular distribution resistance values listed in
boldface. Special resistances available.
REV. 09/04
*RoHS COMPLIANT
VERSIONS
AVAILABLE
