.46 ±.03
(.018 ±.001)
123
4.50 ± .38
(.177 ± .015)
.46 ± .03**
(.018 ± .001)
1.27 ± .25
(.050 ± .010)
.46 ± .03**
(.018 ± .001)
123
123
123
2.16
(.085)
4.31 ± .38
(.170 ± .015)
123
4.50 ± .38
(.177 ± .015)
1.22 ± .25**
(.048 ± .010)
TYP.
6.71 ± .38
(.264 ± .015)
6.71 ± .38
(.264 ± .015)
1.22 ± .25**
(.048 ± .010)
1.02
(.040)
4.50
(.177)
.46 ± .03**
(.018 ± .001)
4.50 ± .38**
(.177 ± .015)
4.88 ± .51**
(.192 ± .020)
4.50 ± .38
(.177 ± .015)
7.24 ± .51
(.285 ± .020)
7.24 ± .51
(.850 ± .020)
TYP.**
1.22 ± .25
(.048 ± .010)
.76**
(.030)
1.22 ± .25
(.048 ± .010)
1.02
(.040)
1.02
(.040)
1.02
(.040)
2.54
(.100)
2.54
(.100) 2.54
(.100)
2.54
(.100)
1.02
(.040)
2.54
(.100)
2.54 ± .25
(.100 ± .010)
2.54 ± .25
(.100 ± .010)
2.54 ± .25
(.100 ± .010)
2.54
(.100) 2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
.76
(.030)
1.27 ± .25**
(.050 ± .010)
1.27 ± .38**
(.050 ± .015)
1.27 ± .25**
(.050 ± .010)
7.24 ± .51
(.285 ± .020)
2.16
(.085)
1.22 ± .25**
(.048 ± .010)
6.78 ± .51
(.267 ± .020)
0.76 ± .25
(.030 ± .010)
DIA.**
ADJ. SLOT
1.78
(.070)
.51
(.020)
.64
(.025)
WIDE
X
XDEEP
DIA.
1.27 ± .25**
(.050 ± .010)
.46 ± .03**
(.018 ± .001)
Features
■ Multiturn / Cermet / Industrial / Sealed
■ Standoffs allow thorough PC board
washing
■ Tape and reel packaging available
■ RoHS compliant* version available
■ For trimmer applications/processing
guidelines,
click here
3266 - 1/4 ” Square Trimpot® Trimming Potentiometer
†“Fluorinert” is a registered trademark of 3M Co.
Electrical Characteristics
Standard Resistance Range
........................10 ohms to 1 megohm
(see standard resistance table)
Resistance Tolerance ........... ±10 % std.
Absolute Minimum Resistance
........................... 1 % or 2 ohms max.
(whichever is greater)
Contact Resistance Variation
........................ 3.0 % or 3 ohms max.
(whichever is greater)
Adjustability
Voltage Divider ...................... ±0.02 %
Rheostat ................................ ±0.05 %
Resolution ...................................
Insulation Resistance ............... 500 vdc.
1,000 megohms min.
Dielectric Strength
Sea Level................................ 600 vac
80,000 Feet ............................ 250 vac
.................12 turns nom.
Environmental Characteristics
Power Rating (300 volts max.)
70 °C .................................... 0.25 watt
150 °C ....................................... 0 watt
Temperature Range ... -55 °C to +125 °C
... ±100 ppm/°C
Seal Test ......................85 °C Fluorinert†
Humidity .......MIL-STD-202 Method 103
96 hours (2 % ΔTR, 10 Megohms IR)
Vibration ....... 30 G (1 % ΔTR; 1 % ΔVR)
Shock ......... 100 G (1 % ΔTR; 1 % ΔVR)
Load Life ...1,000 hours 0.25 watt 70 °C
(3 % ΔTR; 3 % 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 ..................................... 0.015 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
13CW
CLOCKWISE
CCW
2WIPER
How To Order
3266 W - 1 - 103 __ LF
Model
Style
Product Indicator
-1 = Standard Product
Resistance Code
Packaging Designator
Blank = Tube (Standard)
R = Tape and Reel (Z and Y Pin Styles
Only)
A = Ammo Pack (Z and Y Pin Styles Only)
Terminations
LF = 100 % Tin-plated (RoHS compliant)
Blank = 90 % Tin / 10 % Lead-plated
(Standard)
Consult factory for other available options.
Tape and reel material meets Antistatic ANSI/
ESD 5541-2003 packaging standards.
TOLERANCES: ± 0.25 EXCEPT WHERE NOTED
(.010)
DIMENSIONS: MM
(INCHES)
**Common dimensions
*RoHS COMPLIANT
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on
the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf
“Trimpot” is a registered trademark of Bourns, Inc.
3266 - 1/4 ” Square Trimpot® Trimming Potentiometer
Standard Resistance Table
Resistance Resistance
(Ohms) Code
10 100
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.
12.70
(.500)
18 ± .76
(.709 ± .030)
12.7 +0.3/-0.25
(.500 +.012/- .010)
18 +1.0/-0.5
(709 +.040/-.020)
24.9 ± .76
(.980 ± .030)
4.0 ± .03
(.157 ± .001)
4.01 ± .71
(.158 ± .028)
1
2
3
4.32 ± .38
(.170 ± .015)
2.16 ± .25
(.085 ± .010)
.43 ± .05
(.017 ± .002)
8.9 +.76 /- 0.5
(.035 +.030/-.020)
REF.
DIA.
DIA. TYP.
ALL PINS IN-LINE ON CENTER
DIMENSIONS:
1000/REEL/BOX
2.54
(.100)
MM
(INCHES)
12.70
(.500)
18 ± .76
(.709 ± .030)
4.0 ± .03
(.157 ± .001)
4.01 ± .71
(.158 ± .028)
1
2
325.9 ± 0.76
(1.020 ± .030)
18 +1.0/-0.5
(709 +.040/-.020)
12.7 +0.3/-0.25
(.500 +.012/-.010)
4.32 ± .38
(.170 ± .015)
2.16 ± .25
(.085 ± .010)
REF.
DIA.
8.9 +.76 /-.5
(.035 +.030/-.020)
ALL PINS IN-LINE ON CENTER
DIMENSIONS:
1000/REEL/BOX
2.54
(.100)
MM
(INCHES)
DIMENSIONS: MM
(INCHES)
REV. 05/16
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific disclaimers as set forth on the last page of this document, and at www.bourns.com/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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