BOURNS 3386 Service Manual
Features
9.53
(.375)
5.33
(.210)
.51 ± .05
(.020 ± .002)
5.97 ± .89
(.235
± .035)
.38
(.015)
3.56 ± .38
(.140 ± .015)
3.81
(.150)
132
4.83
(.190)
3386B
2.54
(.100)
132
3386C
1.40 ± .38
(.055 ± .015)
13
2
3386H
2.44
(.096)
3.81
(.150)
132
3386J
2.44
(.096)
312
3386S
2.44
(.096)
312
3386W
31
2
3386X
ADJ. SLOT
.76
(.030)
.76
(.030)
3.15
(.124)
3.56 ± .38
(.140 ± .015)
1.40 ± .38
(.055 ± .015)
3.81
(.150)
WIDE
X
X
DEEP
LONG
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
3.81
(.150)
9.53
(.375)
MIN.
DIA. PINS
3.81
(.150)
3.81
(.150)
*RoHS COMPLIANT
VERSIONS
AVAILABLE
■ Single Turn / Cermet / Industrial / Sealed
■ Available on tape and reel
■ Available with a knob for finger adjust
■ Available with extended shaft
■ Available with cross-slot rotor
Features
■ Top and side adjust types (F, P, H, W, X
most popular)
■ High voltage types available
(see Model 3386 HV2/3386 HV3 for
details)
■ RoHS compliant* version available
3386 - 3/8 ” Square Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range
..................................10 to 2 megohms
Resistance Tolerance ............±10 % std.
Absolute Minimum Resistance
.........................................2 ohms max.
Contact Resistance Variation
.............................2 % or 3 ohms max.
Adjustability
Voltage....................................±0.05 %
Resistance ..............................±0.15 %
Resolution.....................................Infinite
Insulation Resistance ................500 vdc.
Dielectric Strength
Sea Level .................................900 vac
70,000 Feet ..............................350 vac
Adjustment Angle ..................280 ° nom.
Environmental Characteristics
Power Rating (300 volts max.)
85 °C........................................0.5 watt
125 °C.........................................0 watt
Temperature Range ....-55 °C to +125 °C
Temperature Coefficient ....±100 ppm/°C
Seal Test........................85 °C Fluorinert
Humidity........MIL-STD-202 Method 103
Vibration.........30 G (1 % ∆TR; 1 % ∆VR)
Shock...........100 G (1 % ∆TR; 1 % ∆VR)
Load Life ..1,000 hours 0.5 watt @ 70 °C
Rotational Life ........................200 cycles
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
Flammability ...........................U.L. 94V-0
Standard Packaging .....50 pcs. per tube
Wiper................50 % (Actual TR) ±10 %
Adjustment Tool ..............................H-90
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
†“Fluorinert” is a registered trademark of 3M Co.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
(see standard resistance table)
(tighter tolerance available)
(whichever is greater)
1,000 megohms min.
(2 % ∆TR, 10 Megohms min.)
(3 % ∆TR; 1 % or 1 ohm,
whichever is greater, CRV)
(4 % ∆TR; 1 % or 1 ohm,
whichever is greater, CRV)
trademark, resistance code,
wiring diagram, date code,
manufacturer’s model
number and style
96 hours
Common Dimensions
Side Adjust
†
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
DIMENSIONS ARE:
MM
(INCHES)
Standard Resistance Table
Resistance Resistance
(Ohms) Code
10 100
20 200
50 500
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
2,000,000 205
Popular distribution resistance values listed in
boldface. Special resistances available.
How To Order
3386 P - 1 - 103 T __ LF
Model
Style
Standard or Modified
Product Indicator
-1 = Standard Product
-EY5 = Extended Shaft
Resistance Code
Optional Suffix Letter
T = Knob**
Packaging Designator
Blank = Tube (Standard)
R = Tape & Reel (W and U Pin Styles Only)
A = Ammo Pack (W and U Pin Styles Only)
Terminations
LF = 100 % Tin-plated (RoHS compliant)
Blank = 90 % Tin / 10 % Lead-plated
**Knob option is available only in standard Tube
packaging.
Consult factory for other available options.
(Standard)
1.40
(.055)
2.54
(.100)
2.54
(.100)
The Model 3386 is available with a knob for finger
adjustment. Add suffix letter "T" to order code for
F, P and X terminal styles.
5.59
(.220)
4.83
(.190)
10.41 ± .51
(.410 ± .020)
6.60
(.260)
8.38
(.330)
ADJ. SLOT
5.59
(.220)
1.02
(.040)
1.40
(.055)
WIDE
X
X
DEEP
LONG
3.71
(.146)
2.54
(.100)
7.87
(.310)
3.71
(.146)
7.87
(.310)
4.78
(.188)
1
3
2
2.54
(.100)
2.54
(.100)
2.54
(.100)
1
3
CW
CLOCKWISE
CCW
2
WIPER
3386 - 3/8 ” Square Trimming Potentiometer
Common Dimensions
Top Adjust
ADJ. SLOT
.76
WIDE
(.030)
.76
X
(.030)
3.15
X
(.124)
3386F
9.53
(.375)
5.08
(.200)
DEEP
LONG
2.54
(.100)
9.53
(.375)
5.64
(.222)
31
2.24 ± .38
(.088 ± .015)
2.54
(.100)
2
3386K
2.54 ± .25
(.100 ± .010)
3.05 ± .38
(.120 ± .015)
3386M
3386P
4.78 ± .38
(.188 ± .015)
3386R
1.22 ± .38
(.048 ± .015)
2 PLCS.
2
31
90° ± 3°
213
3.81
(.150)
2.54
(.100)
1
3
2
231
(.100)
2.54
(.100)
(.150)
(.150)
2.54
3.81
(.150)
3.81
3.81
4.83
(.190)
.38
(.015)
5.97 ± .89
(.235 ± .035)
.51 ± .05
(.020 ± .002)
MIN.
3386T
3386U
3386Y
3386G
3386V
ADJ. SLOT
.76
WIDE
(.030)
.97
XXDEEP
(.038)
3.05
LONG
(.120)
COMMON TO
3386V
3.56 ± .38
(.140 ± .015)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
3.05 ± .38
(.120 ± .015)
2.54
(.100)
3.56 ± 0.38
(.140 ± .015)
10.16
(0.40)
123
321
2
31
2
13
312
3386H-EY5
3386X-EY5 – SHOWN
ADJ. SLOT
.76
(.030)
2.54
X
(.100)
3.71
X
(.146)
1.40
(.055)
3386P-EY5
WIDE
DEEP
LONG
2.54
(.100)
2.54
(.100)
2
31
2.54
(.100)
2.54
(.100)
2.54
(.100)
5.64
(.222)
.76 ± .38
(.030 ± .015)
4.78 ± .38
(.188 ± .015)
5.08
(.200)
2.54
(.100)
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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