Features
■
Low TCR
■
Multiturn / Cermet / Industrial / Sealed
■
Standoffs allow thorough PC board
Model 3266-LTC is obsolete and not
recommended for new designs.
Model 3266
is preferred.
Applications
■
Rheostat applications with wiper currents
washing
■
Patent #4427966 drive mechanism
less than 25 microamps
■
Process control instrumentation
■
Power supplies
3266-LTC - 1/4 ” Square Trimpot
®
Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range
................................ 2 K to 25 K 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 ...................... ±20 ppm/°C
Through the Wiper .......... ±50 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 % ±10 %
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.
Product Dimensions
3266W
Common Dimensions
1.24 ±.25**
(.049 ±.010)
Standard Resistance Table
Resistance
(Ohms)
2,000
5,000
10,000
20,000
25,000
Resistance
Code
202
502
103
203
253
4.50 ±.38**
(.177 ±.015)
7.24 ±.51
TYP.**
(.285 ±.020)
4.78 ±.38**
(.188 ±.015)
6.71 ±.38
TYP.
(.264 ±.015)
ADJ. SLOT
1.78 DIA.
(.070)
.51
WIDE
X
(.020)
1.22 ±.25
(.048 ±.010) X .64 DEEP
(.025)
1 2 3
.46 ±.13
(.018 ±.005)
.46 ±.03
DIA.**
(.018 ±.001)
2.54
2.54 (.100)
.76** (.100)
Popular values listed in boldface. Special
resistances available.
How To Order
3266 W - LTC - 103
Model
Style
E
T
E
L
O
S
B
O
2.54
(.100)
(.030)
1.02
(.040)
3266P
1.52
(.06)
1 2 3
4.42 ± .51
(.174 ±.020)
0.76 ± .25
(.030 ± .010)
1.02 ±.25
(.040 ±.010)
2.54 ± .25
(.100 ± .010)
2.54 ± .25
(.100 ± .010)
6.48 ±.51
(.255 ±.020)
2.54 ± .25
(.100 ± .010)
3266X
1.02
(.040)
1.24 ±.25
(.049 ±.010)
1 2 3
2.54
(.100)
2.54
(.100)
1.02
(.040)
1.22 ±.25
(.048 ±.010)
.46 ±.13
MIN.**
(.018 ±.005)
2.54
(.100)
.76
(.030)
Product Indicator
Resistance Code
Consult factory for other available options.
**Common dimensions
2
CCW
WIPER
1
CLOCKWISE
3
CW
DIMENSIONS:
TOLERANCES: ±
0.25
(.010)
MM
(INCHES)
EXCEPT WHERE NOTED
REV. 11/09
†“Fluorinert” is a registered trademark of 3M Co.
“Trimpot” is a registered trademark of Bourns, Inc.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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