Features
n
Single Turn / Cermet / Industrial / Sealed
n
Available on tape and reel
n
Available with a knob for finger adjust
n
Available with extended shaft
n
Available with cross-slot rotor
n
Top and side adjust types (F, P, H, W, X
most popular)
n
RoHS compliant* version available
n
For trimmer applications/processing
guidelines, click here
Electrical Characteristics
Standard Resistance Range
......................10 ohms to 2 megohms
(see standard resistance table)
Resistance Tolerance ........... ±10 % std.
(tighter tolerance available)
Absolute Minimum Resistance
....................................... 2 ohms max.
Contact Resistance Variation
........................... 2 % or 3 ohms max.
(whichever is greater)
Adjustability
Voltage Divider ...................... ±0.05 %
Rheostat ................................ ±0.15 %
Resolution ................................... Infinite
Insulation Resistance ............... 500 vdc.
1,000 megohms min.
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
96 hours
(2 %
ΔTR,
10 Megohms min.)
Vibration ....... 30 G (1 %
ΔTR;
1 %
ΔVR)
Shock ......... 100 G (1 %
ΔTR;
1 %
ΔVR)
Load Life.. 1,000 hours 0.5 watt @ 70 °C
(3 %
ΔTR;
3 % or 3 ohms,
whichever is greater, CRV)
Rotational Life .......................200 cycles
(4 %
ΔTR;
3 % or 3 ohms,
whichever is greater, CRV)
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
Wiper ............... 50 % (Actual TR) ±10 %
Adjustment Tool..............................H-90
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
3386 - 3/8 ˝ Square Trimpot
®
Trimming Potentiometer
Common Dimensions
Side Adjust Models B,C,J,X
ADJ. SLOT
.76
WIDE
(.030)
X .76
DEEP
(.030)
X 3.15 LONG
(.124)
.38
MIN.
(.015)
Product Dimensions
Common Dimensions
Side Adjust Models H,S,W
ADJ. SLOT
.76
WIDE
(.030)
X .76
DEEP
(.030)
X 3.15 LONG
(.124)
.38
MIN.
(.015)
9.53
(.375)
9.53
(.375)
5.33
(.210)
.51
±
.05 DIA. PINS
(.020
±
.002)
4.83
(.190)
3
2
1
9.53
(.375)
9.53
(.375)
5.64
(.222)
.51
±
.05 DIA. PINS
(.020
±
.002)
2
1
3
5.97
±
.89
(.235
±
.035)
5.97
±
.89
(.235
±
.035)
3386B
3.56
±
.25
(.140
±
.010)
3386H
2.54
(.100)
1.40
±
.25
(.055
±
.010)
3.81
(.150)
3.81
(.150)
2.54
(.100)
2.54
(.100)
1
2
3
3386C
3.56
±
.25
(.140
±
.010)
2.54
(.100)
3386S
2.44
(.096)
3
2
1
2.54
(.100)
3
2
1
3.81
(.150)
3.81
(.150)
1
2
3
3386J
2.44
(.096)
3386W
3.81
(.150)
3.81
(.150)
2.44
(.096)
2.54
(.100)
2.54
(.100)
3386X
2.54
(.100)
3
2
1
1.40
±
.25
(.055
±
.010)
2.54
(.100)
2.54
(.100)
MM
DIMENSIONS:
(INCHES)
0.25
TOLERANCES: ±
EXCEPT WHERE NOTED
(.010)
How To Order
Resistance
Code
100
200
500
101
201
501
102
202
502
103
203
253
503
104
204
254
504
105
205
Standard Resistance Table
Resistance
(Ohms)
10
20
50
100
200
500
1,000
2,000
5,000
10,000
20,000
25,000
50,000
100,000
200,000
250,000
500,000
1,000,000
2,000,000
Popular distribution resistance values listed in
boldface. Special resistances available.
*RoHS Directive 2015/863, Mar. 31, 2015 and Annex
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the
last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
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)
Tape and reel material meets Antistatic ANSI/
ESD 5541-2003 packaging standards.
Terminations
LF = 100 % Tin-plated (RoHS compliant)
Blank = 90 % Tin / 10 % Lead-plated
(Standard)
**Knob option is available only in standard tube
packaging. Not recommended for side load
applications.
Consult factory for other available options.
†“Fluorinert” is a registered trademark of 3M Co.
“Trimpot” is a trademark of Bourns, Inc.
3386 P - 1 - 103 T __ LF
3.81 ± .71
(.15 ± .028)
1
2
3
8.89 + .76 /- .50
(.350 + .030/ - .020)
18 + 1.0/ - 0.5
(.709 + .040/ - .020)
12.70 + .30/ - 0.25
(.500 + .012/ - .010)
4.83 ± .25
(.190 ± .010)
4.0 ± 0.3
(.157 ± .012)
DIA.
3386 - 3/8 ˝ Square Trimpot Trimming Potentiometer
.51 ± .05
1000/REEL/BOX
2.54
ALL PINS IN-LINE ON CENTER
(.100)
®
MM
DIMENSIONS:
(INCHES)
2.44 ± .25
(.096 ± .010)
(.020 ± .002)
DIA. TYP.
Packaging Specifications
SIDE ADJUST
3386W-1
27.56 ± .76
(1.085 ± .030)
TOP ADJUST
3386U-1
22.98 ± .076
(.905 ± .030)
8.89 ± 0.7
(.350 ± .028)
12.70 REF.
(.500) 18.03 ± 0.7
(.710 ± .030)
12.70
REF.
(.500)
18 ± .76
(.709 ± .030)
3.81 ± .71
(.15 ± .028)
10.16 MIN.
(.400)
3
1
1
2
3
8.89 + .76 /- .50
(.350 + .030/ - .020)
18 + 1.0/ - 0.5
(.709 + .040/ - .020)
12.70 + .30/ - 0.25
(.500 + .012/ - .010)
4.83 ± .25
(.190 ± .010)
4.0 ± 0.3
(.157 ± .012)
DIA.
18.03 ± 1.5
(.710 ± .060)
3.81 ± 0.3
(.150 ±.028)
12.7 ± 0.3
(.500 ± .012)
3.99 ± 0.3
DIA.
(.157 ± .012)
9.53
(.375)
4.78
(.188)
2.54
ALL PINS IN-LINE ON CENTER
(.100)
MM
DIMENSIONS:
(INCHES)
2.54
ALL PINS IN-LINE ON CENTER
(.100)
MM
DIMENSIONS:
(INCHES)
2.44 ± .25
(.096 ± .010)
1000/REEL/BOX
.51 ± .05
(.020 ± .002)
DIA. TYP.
1000/REEL/BOX
TOP ADJUST
3386U-1
22.98 ± .076
(.905 ± .030)
8.89 ± 0.7
(.350 ± .028)
Meets EIA Specification 468.
12.70 REF.
DIMENSIONS:
(.500) 18.03 ± 0.7
(.710 ± .030)
MM
(INCHES)
10.16 MIN.
(.400)
3
1
18.03 ± 1.5
(.710 ± .060)
3.81 ± 0.3
(.150 ±.028)
12.7 ± 0.3
(.500 ± .012)
3.99 ± 0.3
DIA.
(.157 ± .012)
9.53
(.375)
4.78
Asia-Pacific:
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
(.188)
Europe:
Tel: +36 88 885 877 • Email: eurocus@bourns.com
2.54
ALL PINS IN-LINE ON CENTER
(.100)
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
MM
DIMENSIONS:
(INCHES)
www.bourns.com
1000/REEL/BOX
REV. 08/19
“Trimpot” is a registered trademark of Bourns, Inc.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns
®
products manufactured by or on behalf of Bourns, Inc. and
Unless otherwise expressly indicated in writing, Bourns
®
products and data sheets relating thereto are subject to change
and complete before placing orders for Bourns
®
products.
The characteristics and parameters of a Bourns
®
product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns
®
®
product with other components
the actual performance of the Bourns
®
®
®
product as meeting the requirements of a particular industry
®
of Bourns products are responsible for ensuring compliance with safety-related requirements and standards applicable to
®
Bourns
®
on a case-by-case basis, use of any Bourns
®
®
®
®
®
Bourns
®
®
standard products that are suitable for use in aircraft
®
standard
the user’s sole risk.
®
and the user for which such Bourns
®
®
custom products shall be negotiated on a case-by-case basis by Bourns
®
also apply to such Bourns custom products.
Users shall not sell, transfer, export or re-export any Bourns
®
Bourns
®
standard products shall
products and Bourns technology and technical data may not under any circumstance be
exported or re-exported to countries subject to international sanctions or embargoes. Bourns
®
products may not, without
®
bilingual versions are available at:
Web Page:
http://www.bourns.com/legal/disclaimers-terms-and-policies
PDF:
http://www.bourns.com/docs/Legal/disclaimer.pdf
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