Features
n 3/8 ” Square/ Multiturn / Cermet /
Industrial / Sealed
n Five popular terminal styles
n Standoffs
n RoHS compliant* version available
n For trimmer applications/processing
guidelines, click here
3299 - 3/8 ” Square Trimpot
®
Trimming Potentiometer
“Trimpot” is a registered trademark of Bourns, Inc.
†“Fluorinert” is a registered trademark of 3M Co.
*RoHS Directive 2002/95/EC Jan. 27, 2003 including
annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
The device characteristics and parameters in this data
sheet can and do vary in different applications and
actual device performance may vary over time.
Users should verify actual device performance in their
specific applications.
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 ................................... Innite
Insulation Resistance ............... 500 vdc.
1,000 megohms min.
Dielectric Strength
Sea Level................................ 900 vac
70,000 Feet ............................ 350 vac
Eective 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 Coecient ... ±100 ppm/°C
Seal Test ......................85 °C Fluorinert†
Humidity .......MIL-STD-202 Method 103
96 hours
(2 % ΔTR, 10 Megohms IR)
Vibration ....... 20 G (1 % ΔTR; 1 % ΔVR)
Shock ......... 100 G (1 % ΔTR; 1 % ΔVR)
Load Life
............. 1,000 hours 0.5 watt @ 70 °C
(3 % ΔTR; 3 % or 3 ohms,
whichever is greater, CRV)
Rotational Life .......................200 cycles
(4 % ΔTR; 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
Product Dimensions
1
3
CW
CLOCKWISE
WIPER
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
2,000,000 205
REV. 11/16
TOLERANCES: ±
0.25
EXCEPT WHERE NOTED
(.010)
DIMENSIONS:
MM
(INCHES)
How To Order
3299 W - 1 - 103 LF
Model
Style
Standard or Modied
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.
Popular distribution resistance values listed in
boldface. Special resistances available.
1.52
(.060)
3
2
1
BOTTOM VIEW
BOTTOM VIEW
BOTTOM VIEW
BOTTOM VIEW
BOTTOM VIEW
3299P
Common Dimensions
1.09 ± .254
(.043 ± .010)
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 ± .254
(.044 ± .010)
6.22 ± 1.14
(.245 ± .045)
ADJ. SLOT
2.29
(.090)
.56
(.022)
.64
(.025)
WIDE
X
X
DEEP
DIA.
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
Product Dimensions
TOLERANCES: ±
0.25
EXCEPT WHERE NOTED
(.010)
DIMENSIONS:
MM
(INCHES)
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
