Contact Resistance Variation ...........................±1 % .................................................................±3 % of total resistance or 3 ohms
(whichever is greater)
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Total Resistance Shift ................................... ±10 % maximum ................................................ ±3 % maximum
Rotational Life (No Load) ................................... 100,000 cycles ................................................... 20,000 cycles
Total Resistance Shift ................................... ±15 % TRS maximum ....................................... ±5 % or 5 ohms TRS whichever is greater
Torque (Starting and Running)..................................................................................... A & B bushings 0.35 to 4.23 N-cm (0.05 to 6.0 oz.-in.)
C & E bushings 0.21 to 4.23 N-cm (0.3 to 6.0 oz.-in.)
3856 – 0.11 to 2.12 N-cm (0.15 to 3.0 oz.-in.)
Mounting (Torque on Bushing) ........................................................................................................... 1.7-2.0 N-m (15-18 lb.-in.) maximum
Weight (Single Section) ......................................................................................................................................................30 grams maximum
Terminals ................................................................................................................................................ Printed circuit terminals or solder lugs
Soldering Condition ............................................Recommended hand soldering using Sn95/Ag5 no clean solder, 0.025 ˝ wire diameter.
Maximum temperature 399 °C (750 °F) for 3 seconds. No wash process to be used with no clean flux.
Part can be wave soldered at 260 °C (500 °F) for 5 seconds, no wash process with no clean flux.
Marking...........................................................................Manufacturer’s trademark, wiring diagram, resistance, date code, and part number
Ganging (Multiple Section Potentiometers) ..............................................................................................................................1 cup maximum
Hardware.................................................................................... One lockwasher and one mounting nut is shipped with each potentiometer;
locking bushing versions are shipped with one additional locking nut
specifications tested at 250 RPM, at room ambient: +25 °C nominal.
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.
3851/3852/3856 – 3/4 ˝ Diameter Panel Control
Product Dimensions
9.53
(.38)
.38
(.015)
12.7, 22.23
STD.
(1/2, 7/8)
3/8-32 UNEF
.25
45
°
X
(.010)
CHAMFER
6.35+.03/-.05
DIA.
(.250+.001/-.002)
SHAFT SLOT
1.19
.047 WIDE X
1.60+.38/.00
DEEP
(.063+.015/-.000)
6.35
±
.76
(.25
±
.03)
12.7
(.50)
.38
(.015)
15.88
STD.
(5/8)
3/8-32 UNEF
.25
45
°
X
(.010)
CHAMFER
6.35+.03/-.05
DIA.
(.250+.001/-.002)
SHAFT SLOT
1.19 WIDE X
(.047)
1.60+.38/-.00
(.063+.015/-.000)DEEP
6.35
±
.76
(.25
±
.03)
19.05
(.75)
DIA.
12.19
DIA.
(.480)
19.05
(.75)
DIA.
12.19
DIA.
(.48)
SOLDER LUG TERMINAL
6.35
2.79
(.25)
TYP.
(.110)
3 PLCS.
12.7
(.50)
EACH TERMINAL LUG
2
3
2 PLCS.
1
WILL ACCOMMODATE
.72
THREE
(.028)
DIAMETER
14.02
±
.25
(.724 DIA. AWG
(.552
±
.010)
STRANDED) WIRES.
STANDARD
PRINTED CIRCUIT TERMINAL
1.02
6.35
TYP.
TYP.
(.040)
(.25)
15.88
±
.38
(.625
±
.015)
16.00
5.49
OPTIONAL FLAT
(.63)
(.216)
1.52
28.58
LONG OR
FRONT BUSHING FOR SHAFTS UNDER
(.06)
(1-1/8)
1
2
3
6.35
(.25)
6.35
(.25)
9.53, 22.23
STD.
(3/8, 7/8)
.38
(.015)
2.36
(.094)
1/4-32 UNEF
.25
45
°
X (.010)
CHAMFER
6.35
±
.76
(.25
±
.03)
9.53
(.38)
.38
(.015)
12.7
STD.
(1/2)
1/4-32 UNEF
.25
45
°
X (.010)
CHAMFER
6.35
±
.76
(.25
±
.03)
SUGGESTED BOARD LAYOUT
6.35
6.35
(.25)
(.25)
1.40
DIA.
(.055)
19.05
(.75)
DIA.
12.19
DIA.
(.480)
19.05
(.75)
DIA.
3.18
±
0.25
DIA.
(.125
±
.001)
3.18
±
.025
DIA.
(.125
±
.001)
SHAFT SLOT
.79 WIDE X .76 DEEP
(.031)
(.03)
.25
OPTIONAL FLAT
LONG OR
(.010)
1.52
15.88
FRONT BUSHING FOR SHAFTS UNDER
(.06)
(5/8)
SHAFT SLOT
.79 WIDE X .76 DEEP
(.03)
(.031)
12.19
DIA.
(.480)
A, B & H BUSHINGS
9.53
(.375)
C & E BUSHINGS
9.53
(.375)
9.91
DIA.
(.390)
3.18
DIA.
(.125)
3.18
6.73
DIA.
(.125)DIA.
(.265)
9.53
(.38)
6.35
±
.76
(.25
±
.03)
12.7
(.50)
.38
(.015)
6.35+.03/-.05
DIA.
(.250+.001/-.002)
3/8-32 UNEF
1.19
(.047)
9.53
(.38)
6.35
±
.76
(.25
±
.03)
.38
(.015)
12.7
(.50)
6.35+.03/-.05
DIA.
(.250
±
.03)
3/8-32 UNEF.
.79
(.031)
SHAFT SLOT
ALIGNMENT
AT CCW
FLAT
ALIGNMENT
AT CCW
50
° ±
10
°
50
° ±
10
°
19.05
(.75)
DIA.
12.19
DIA.
(.480)
1.60+3.81/-.000
(.063+.015/-.000)
DIA.
22.23
STD.
(7/8)
19.05
(.75)
DIA.
12.19
DIA.
(.480)
.79
±
.25
(.031
±
.010)
22.23
STD.
(7/8)
3.18
±
.03
(.125
±
.003)
DIA.
.25
45
°
X (.010)
CHAMFER
2.67
±
.381
(.105
±
.015)
ANTI-ROTATION LUG
PROJECTS 1/16 INCH
ABOVE MOUNTING FACE.
TOLERANCES EXCEPT AS NOTED:
.127
.XX
±
.38
DECIMALS: .XXX
±
(.005),
(.015)
FRACTIONS:
±
1/64
ANGLE:
±
3 %
.25
45
°
X (.010)
CHAMFER
DIMENSIONS:
MM
(INCHES)
CCW
1
3
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.
POTENTIOMETER
2
3851/3852/3856 – 3/4 ˝ Diameter Panel Control
Hardware
LOCKWASHER H-37-1
6.6
(.26)
NUT H-38-1
9.53 +0/-0.38
(.375 +0/-.015)
2.36 ± 0.25
(.093 ± .01)
LOCKNUT H-38-3
4.57 ± 0.05
(.180 ± .002)
7.75
(.305)
11 +0/-0.43
(.433 +0/-.017)
NUT H-38-2
2.36 ± 0.25
(.093 ± .01)
30 ° ± 5 °
1.02
(.040)
30 ° ± 5 °
TYP.
0.64
(.025)
15 ° ± 1 °
1/4-32 UNEF
1/4-32
NEF-20
12.07 ± 0.25
(.475 ± .01)
LOCKWASHER H-37-2
9.58 ± 0.36
(.377 ± .014)
0.64 ± 0.05
(.025 ± .002)
7.92
(.312)
3/8-32 NEF-2B
3.96
(.156)
12.52 ± 0.36
(.493 ± .014)
0.56 ± 0.05
(.022 ± .002)
14.66 +0/-0.43
(.577 +0/-.017)
30 ° ± 5 °
Date Code Description
YYWWM
M = COUNTRY OF MANUFACTURE
(MEXICO)
WW = WEEK NUMBER
YY = LAST TWO DIGITS OF YEAR
MANUFACTURED
DIMENSIONS:
MM
(INCHES)
LOCKNUT H-38-4
8.51 ± 0.05
(.335 ± .002)
1.91
MIN.
(.075)
18 ° ± 2 °
3/8-32
NEF-2B
1.02
(.040)
12.7
(.5)
1.14 ± 0.38
(.045 ± .015)
30 ° ± 5 ° TYP.
4.83
(.19)
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.
3851/3852/3856 – 3/4 ˝ Diameter Panel Control
How To Order
3852
A
-
28
2
-
103
A
L
12
16
16
20
28
28
SHAFT TYPE
(FMS) & DIAMETER
3/8 ” (9.53 mm) L X 1/8 ” (3.18 mm) D
1/2 ” (12.7 mm) L x 1/4 ” (6.35 mm) D
1/2 ” (12.7 mm) L x 1/8 ” (3.18 mm) D
5/8 ” (15.88 mm) L X 1/4 ” (6.35 mm) D
7/8 ” (22.20 mm) L X 1/4 ” (6.35 mm) D
7/8 ” (22.20 mm) L X 1/8 ” (3.18 mm) D
AVAILABLE ONLY IN
MODELS
3851, 3852
3851, 3852
3851, 3852
3851, 3852
3851, 3852
3856
3851, 3852
3856
BUSHINGS
C
A
C, E
A, B
A, B
A
C, E
H
Consult factory for lengths not shown.
A
B
C
E
H
BUSHING
Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L
Locking 3/8 ” (9.53 mm) D x 1/2 ” (12.7 mm) L
Plain 1/4 ” (6.35 mm) D x 1/4 ” (6.35 mm) L
Locking 1/4 ” (6.35 mm) D x 1/2 ” (12.7 mm) L
Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L
APPLICABLE MODELS
3851, 3852, 3856
3851, 3852
3851, 3852
3851, 3852
3856 (3.18 mm D Shaft)
RESISTANCE
CODE/VALUE
(IN OHMS)
Model 3851
(102)
1K
(252)
2.5 K
(502)
5K
(103)
10 K
(253)
25 K
(503)
50 K
(104)
100 K
(254)
250 K
(504)
500 K
(105)
1M
Models 3852/3856
(101)
100
(251)
250
(501)
500
(102)
1K
(252)
2.5 K
(502)
5K
(103)
10 K
(253)
25 K
(503)
50 K
(104)
100 K
(254)
250 K
(504)
500 K
(105)
1M
ELEMENT
TAPER/TOLERANCE
A
Linear ±10 %
B
Linear ±20 %
C
Audio CW ±10 %
D
Audio CW ±20 %
E
Linear ±10 %
F
Audio CCW ±10 %
G
Audio CCW ±20 %
H
Linear ±5 %
RoHS IDENTIFIER
L
Compliant
MODEL
3851 3/4 ” (19.05 mm) D Single-Turn C.P.
3852 3/4 ” (19.05 mm) D Single-Turn Cermet
3856 3/4 ” (19.05 mm) D 3-3/4-Turn Cermet
TERMINAL STYLE AND
SHAFT TYPE
1
2
3
5
6
7
Solder Lugs, Plain End
Solder Lugs, Slotted End
Solder Lugs, Flatted Shaft
PC Pins, Plain End
PC Pins, Slotted End
PC Pins, Flatted Shaft
Boldface features are Bourns standard options.
All others are available with higher minimum order
quantities.
APPLICABLE
MODELS
3852, 3856
3851
3852, 3856
3851
3851
3852, 3856
3851
3852, 3856
Asia-Pacific:
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA:
Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
REV. 10/20
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.
我们公司最近要做个ATOM平台的移动设备，希望有经验的free lancer或公司与我联系。以下的资料仅供参考：Experience must include a successful implementation of an Atom based system that went into commercial production. Experience must have involved ...
Basic questions: How to write a .cmd file? What should I pay attention to when writing it? Where can I find the header file for 2812? What preparations are needed to start programming?...
The data reading and writing on the Local Bus are divided into synchronous mode and asynchronous mode. In the synchronous mode, an external clock signal is required for the receiving end and the sendi...
This program refers to the SD card driver from bozai, and adds the function of SD and MMC card judgment. After the SD and MMC are successfully initialized, the card type parameters can be returned for...
Reflow soldering is a critical process in electronics assembly production, and the cleanliness of the reflow oven has a direct impact on product quality. Dust and residue accumulation within the ov...[Details]
Ever since the Tesla fire incident, electric cars, already known for their poor reputation, have been subjected to even more scathing criticism. Despite this, many people are still willing to buy t...[Details]
In June 2014, the Ministry of Industry and Information Technology issued 4G FD-LTE licenses to China Unicom and China Telecom. Together with the 4G TD-LTE licenses issued to China Mobile, China Uni...[Details]
A human-machine interface (HMI) refers to the platform used by people to operate a PLC. This platform provides an interface between programs and humans, serving as a medium for information transmis...[Details]
My career has been closely tied to the semiconductor industry. From product management to content marketing, I've provided countless forecasts and predictions across a variety of roles. Whethe...[Details]
A tubular motor is an electric motor that is typically used to control the movement of machines and equipment. Tubular motors are generally divided into two categories: linear tubular motors and ro...[Details]
A scale, a large, ground-mounted scale, is typically used to measure the tonnage of truck cargo. It's the primary weighing device used in factories, mines, and businesses for bulk cargo measurement...[Details]
From time to time, I see some audiophiles spending a lot of money or a lot of time to DIY speakers, but the results are not what they want. Below I list some of the small experiences I summarized b...[Details]
Analog Devices held a third-quarter fiscal 2025 earnings conference call. Vincent T. Roche, CEO and Chairman of the Board, and Richard C. Puccio, Executive Vice President and Chief Financial Office...[Details]
introduction
The OMAP-L138 dual-core processor is a new generation of low-power single-chip systems (SoCs) from TI. It is widely used in communications, industrial, medical diagnostic, and aud...[Details]
I believe everyone has heard of memory. If your computer is slow, your experts may recommend upgrading it to a larger capacity. But what exactly is computer memory used for? Why does memory capacit...[Details]
In microwave amplification circuits, the power chip is the core of the entire circuit. A large number of semiconductor devices in the chip will generate a lot of heat when working. If the heat diss...[Details]
In July 2025, stimulated by the "old for new" policy, China's new energy vehicle penetration rate reached a historic 50% mark. While industry experts like Cui Dongshu celebrated the market's perfor...[Details]
Perhaps due to the stereotypes surrounding electronic products, many owners of pure electric vehicles have questions about charging. What's the correct way to charge? How can charging slow down bat...[Details]
A graphics processor (GPU), also known as a display core, visual processor, or display chip, is a microprocessor specialized for image processing on personal computers, workstations, game consoles,...[Details]
Embedded System
京公网安备 11010802033920号
EEWORLD
