AV
DI TH AIL
ST RO AB
RI U LE
BU GH
TI
ON
Features
Low TCR
s
Multiturn / Cermet / Industrial / Sealed
s
Standoffs allow thorough PC board
washing
s
Patent #4427966 drive mechanism
s
Applications
s
Rheostat
applications with wiper currents
less than 25 microamps
s
Process control instrumentation
s
Power supplies
3266-LTC - 1/4” Square Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range
.....................................2K to 25K ohms
(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......................................±0.02%
Resistance ................................±0.05%
Resolution.....................................Infinite
Insulation Resistance ................500 vdc.
1,000 megohms min.
Dielectric Strength
Sea Level ..................................600 vac
80,000 Feet...............................250 vac
Effective Travel..................12 turns nom.
Environmental Characteristics
Power Rating (300 volts max.)
70°C .......................................0.25 watt
150°C ..........................................0 watt
Temperature Range
....................................-55°C to +150°C
Temperature Coefficient
End to End..........................±20ppm/°C
Through the Wiper ..............±50ppm/°C
Seal Test ........................85°C Fluorinert*
Humidity........MIL-STD-202 Method 103
96 hours (2%
∆TR,
10 Megohms IR)
Vibration............30G (1%
∆TR;
1%
∆VR)
Shock..............100G (1%
∆TR;
1%
∆VR)
Load Life ....1,000 hours 0.25 watt 70°C
(3%
∆TR;
3% 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 ......................................0.015 oz.
Marking ...........................Manufacturer’s
trademark, resistance code,
wiring diagram, date code,
manufacturer’s model
number and style
Wiper ...........Positioned at 50% nominal
Flammability ...........................U.L. 94V-0
Standard Packaging .....50 pcs. per tube
Adjustment Tool ..............................H-90
NOTE: TCR through the wiper applies when 40% or more
of the resistance element is in the circuit.
*”FLUORINERT” IS A REGISTERED TRADEMARK OF 3M CO.
3266W
Common Dimensions
1.52
±
.38*
(.060
±
.015)
Standard Resistance Table
6.35
TYP.*
(.250)
ADJ. SLOT
1.78 DIA.
(.070)
.56
WIDE
X
(.022)
.64
DEEP
X
(.025)
4.32
±
.38*
(.170
±
.015)
6.85
±
.51
TYP.*
(.270
±
.020)
4.78
±
.38*
(.188
±
.015)
1.02
(.040)
.38
(.015)
Resistance
(Ohms)
2,000
5,000
10,000
20,000
25,000
Resistance
Code
202
502
103
203
253
1 2 3
Popular values listed in boldface. Special
resistances available.
2.54
(.100)
1.02
(.040)
3266P
.76
(.030)
1 2 3
.46
±
.03
DIA.*
(.018
±
.001)
2.54
2.54 (.100)
.76* (.100)
(.030)
How To Order
3266 W - LTC - 103
Model
Style
Product Indicator
4.32
±
.38
(.170
±
.015)
1.02
(.040)
2.54
2.54 (.100)
(.100)
Resistance Code
Consult factory for other available options.
2.54
(.100)
.76
(.030)
3266X
1.02
(.040)
1.52
(.060)
1 2 3
2.54
(.100)
2.54
(.100)
1.02
(.040)
1.02
(.040)
.38
MIN.*
(015)
2.54
(.100)
.76
(.030)
*Common dimensions
2
CCW
WIPER
1
CLOCKWISE
3
CW
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
DIMENSIONS ARE:
METRIC
(INCHES)
Specifications are subject to change without notice.
21
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
