Features
s
s
s
s
s
Vertical adjust type available
Single-Turn / Cermet / Industrial / Sealed
Designed for operational amplifier offset
voltage adjustment applications
Reduces power supply drift errors
Unique center tapped trimming
potentiometer
3386-OT1 - 3/8” Square Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range
.......................100 ohms to 1 megohm
(see standard resistance table)
Resistance Tolerance .............±20% std.
Absolute Minimum Resistance
.........................................2 ohms max.
Voltage Output Variation.............±0.25%
Adjustability (VR) ......................±0.025%
Insulation Resistance @ 500 vdc
............................1,000 megohms min.
Dielectric Strength
Sea Level .................................900 vac
70,000 Feet ..............................350 vac
Effective Electrical Travel........280° nom.
Center Tap Resistance .......2 ohms max.
Center Tap Electrical Center............±5%
Center Tap Dead Band...................6°±4°
Environmental Characteristics
Power Rating
85°C.........................................0.5 watt
150°C..........................................0 watt
Temperature Range
...................................-55°C to +150°C
Temperature Stability (∆VR)
..........................................±0.5% max.
Seal Test ........................85°C Fluorinert*
Humidity........MIL-STD-202 Method 103
96 hours ±2%
∆TR
10 Megohms min.
Vibration, 30G .........................±1%
∆TR
Shock, 100G ...........................±1%
∆TR
Load Life, 1,000 Hours ............±3%
∆TR
Rotational Life, 200 cycles ......±4%
∆TR
Physical Characteristics
Mechanical Angle ...................310° nom.
Torque .............................5.0 oz-in. max.
Stop Strength .................15.0 oz-in. min.
Terminals ........................Solderable pins
Weight ........................................0.03 oz.
Marking ...........................Manufacturer’s
trademark, resistance code,
wiring diagram, date
code, manufacturer’s model
number and style
Flammability ..........................U.L. 94V-0
Standard Packaging
............................50 pcs. per tube/tray
Adjustment Tool ..............................H-90
Also see Model 3296-OT1, page 30.
Model
Style
Catalog Product
Resistance Code
3386P-OT1
4.83
(.190)
5.97
±
.89
(.235
±
.035)
2
2.54
4 (.100)
2.54
(.100)
2.54
(.100)
4.70
±
.51
(.185
±
.030)
2.54
(.100)
Standard Resistance Table
3
.38
MIN.
(.015)
.51
±
.05 DIA.
(.020
±
.002)
9.53
(.375)
9.53
(.375)
ADJ. SLOT
.76
WIDE
(.030)
.76 DEEP
X
(.030)
X 3.81 LONG
(.150)
1
Resistance
(Ohms)
100
200
500
1,000
2,000
5,000
10,000
20,000
50,000
100,000
200,000
500,000
1,000,000
Resistance
Code
101
201
501
102
202
502
103
203
503
104
204
504
105
Popular values listed in boldface. Special
resistances available.
SHADED AREAS TYPICALLY NOT STOCKED BY
DISTRIBUTORS AND NOT RECOMMENDED FOR NEW
DESIGNS.
5.64
(.222)
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
DIMENSIONS ARE:
METRIC
(INCHES)
CLOCKWISE
2
CCW
WIPER
1
4
CENTER TAP
3
CW
Suggested Offset Voltage Adjustment Circuit
+V
3
- INPUT
+ INPUT
R2
R2
R5
4
2
R3
20KΩ
R6
10Ω
1
–V
R4 = R5 + R6
OFFSET
ADJUSTMENT
RANGE = ±V (R3/R6)(R2/R2 + R5)
R2 & R4> R6
-
+
OUTPUT
R1 20KΩ
BOURNS OFFSET TRIMMER
How To Order
3386 P - OT1 - 103
*”FLUORINERT” IS A REGISTERED TRADEMARK OF 3M CO.
62
Specifications are subject to change without notice.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
