AV
DI TH AIL
ST RO AB
RI U L E
BU GH
TI
ON
Features
s
s
s
s
Applications
s
Rheostat
Low TCR
Multiturn / Cermet / Industrial / Sealed
3 terminal styles
Chevron seal design
applications with wiper currents
less than 25 microamps
s
Process control instrumentation
s
Power supplies
3296-LTC - 3/8” Square Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range
.....................................2K to 25K ohms
(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 +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............20G (1%
∆TR;
1%
∆VR)
Shock..............100G (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 ........................................0.03 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
Specifications are subject to change without notice.
Common Dimensions
6.40
±
1.32
(.252
±
.052)
.38
MIN.
(.015)
10.03
(.395)
1.52
(.060)
1.12
(.044)
2.54
(.100)
2.54
(.100)
.51
±
.03 DIA.
(.020
±
.001)
4.83
±
.13
(.190
±
.005)
9.53
(.375)
1.09
(.043)
Standard Resistance Table
Resistance
(Ohms)
2,000
5,000
10,000
20,000
25,000
Resistance
Code
202
502
103
203
253
ADJ. SLOT
2.29 DIA.
(.090)
.56
WIDE
X
(.022)
.76
DEEP
X
(.030)
Popular values listed in boldface. Special
resistances available.
3296P
2.54
(.100)
3
2
1
5.23
(.206)
2.54
(.100)
3
2
2.54 1
(.100)
2.54
(.100)
2.54
(.100)
8.26
±
.64
(.325
±
.025)
How To Order
3296 W - LTC - 103
Model
Style
Product Indicator
Resistance Code
Consult factory for other available options.
3296W
2.41
(.095)
3296X
2.54
(.100)
3
2
2.54 1
(.100)
2.41
(.095)
2
CCW
WIPER
1
CLOCKWISE
3
CW
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
DIMENSIONS ARE:
METRIC
(INCHES)
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.
27
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
