CONNEX 122252

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Item Description:

Qty Price
1 + $31.32800






Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
3851/3852/3856 - 3/4 ” Diameter Panel Control
Initial Electrical Characteristics
1
3851 3852/3856
Conductive Plastic Element Cermet Element
Standard Resistance Range
Linear Tapers (A, B, E, and H) ............................................................1 K to 1 megohm.........................................100 ohms to 1 megohm
Audio Tapers (C, D, F, and G) .............................................................1 K to 1 megohm.........................................1 K ohms to 1 megohm
Total Resistance Tolerance.....................................................................±10 % or ±20 %..........................................±5 % or ±10 %
Independent Linearity.............................................................................±10 %..........................................................(A & H tapers) ±5 %
Absolute Minimum Resistance...............................................................2 ohms maximum........................................ 2 ohms maximum
Effective Electrical Angle ........................................................................250 ° ±5 °.....................................................250 ° ±5 °
Contact Resistance Variation .................................................................±1 %............................................................±3 % of total resistance or 3 ohms
(whichever is greater)
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level............................................................................................900 VAC minimum.......................................900 VAC minimum
70,000 Feet ........................................................................................350 VAC minimum.......................................350 VAC minimum
Insulation Resistance (500 VDC) ............................................................1,000 megohms minimum...........................1,000 megohms minimum
Power Rating (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less)
+70 °C ...............................................................................................(Linear tapers) 1 watt...................................(Linear tapers) 2 watts
(Audio tapers) 0.5 watt (Audio tapers) 1 watt
+125 °C ..............................................................................................0 watt
+150 °C ...................................................................................................................................................................0 watt
Theoretical Resolution............................................................................Essentially infinite ........................................Essentially infinite
Environmental Characteristics
1
Operating Temperature Range ...............................................................-1 °C to +125 °C..........................................-1 °C to +125 °C
Storage Temperature Range...................................................................-65 °C to +125 °C........................................-65 °C to +150 °C
Temperature Coefficient Over Storage Temperature Range...................±1,000 ppm/°C............................................±150 ppm/°C
Vibration..................................................................................................20 G.............................................................20 G
Total Resistance Shift.........................................................................±2 % maximum...........................................±2 % maximum
Voltage Ratio Shift..............................................................................±5 % maximum...........................................±6 % maximum
Shock......................................................................................................100 G...........................................................100 G
Total Resistance Shift.........................................................................±2 % maximum...........................................±2 % maximum
Voltage Ratio Shift..............................................................................±5 % maximum...........................................±6 % maximum
Load Life.................................................................................................1,000 hours .................................................1,000 hours
Total Resistance Shift.........................................................................±10 % maximum.........................................±3 % maximum
Rotational Life (No Load)........................................................................100,000 cycles ............................................50,000 cycles
Total Resistance Shift.........................................................................±15 % TRS maximum ................................±5 % or 5 ohms TRS whichever is greater
Contact Resistance Variation.............................................................±3 %............................................................±3 %
Moisture Resistance (MIL-STD-202, Method 103, Condition B)
Total Resistance Shift.........................................................................±10 % maximum ........................................±2 % maximum
IP Rating .................................................................................................IP 40 ............................................................IP 40
Mechanical Characteristics
1
Stop Strength ..............................................................................................................................................................................................56.5 N-cm (5 lb.-in.)
Mechanical Angle ....................................................................................................................................................................280 ° ±5 ° / 3856 – 1350 ° ±50 °
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, except where noted in the part number.
1
AT ROOM AMBIENT: +25 °C NOMINAL AND 50 % RELATIVE HUMIDITY NOMINAL, EXCEPT AS NOTED.
Features
Single-turn (3851 and 3852)
Linear and audio tapers
3-3/4-turn (3856)
Wide resistance range
Minimal depth package
Good resolution
*RoHS COMPLIANT
VERSIONS
AVAILABLE
Non-RoHS compliant versions are
currently available, although not
recommended for new designs.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
3851/3852/3856 - 3/4 ” Diameter Panel Control
DIMENSIONS ARE:
MM
(INCHES)
9.53
(.38)
3/8-32 UNEF
3851A/3852A
3851B/3852B
19.05
(.75)
DIA.
3/8-32 UNEF
1/4-32 UNEF
3851C/3852C
1/4-32 UNEF
3851E/3852E
3/8-32 UNEF
3856A
3/8-32 UNEF.
3856H
6.35
(.25)
2.79
(.110)
3 PLCS.
14.02 ± .25
(.552 ± .010)
Terminal Configuration
SOLDER LUG TERMINAL
13
2
13
2
SUGGESTED BOARD LAYOUT
STANDARD
PRINTED CIRCUIT TERMINAL
3851/3852/3856
A, B & H BUSHINGS
Shaft End Detail
3850 Family
SHAFT SLOT
ALIGNMENT
AT CCW
FLAT
ALIGNMENT
AT CCW
50 ° ± 10 °
6.35 ± .76
(.25
± .03)
.38
(.015)
19.05
(.75)
DIA.
12.7, 22.23
(1/2, 7/8)
45 ° X
(.010)
CHAMFER
.25
DIA.
6.35+.03/-.05
(.250+.001/-.002)
SHAFT SLOT
1.19
WIDE X
.047
1.60+.38/.00
(.063+.015/-.000)
12.19
(.480)
DIA.
DEEP
OPTIONAL FLAT
LONG OR FRONT BUSHING FOR SHAFTS UNDER
5.49
(.216)
16.00
(.63)
1.52
(.06)
28.58
(1-1/8)
OPTIONAL FLAT
LONG OR
FRONT BUSHING FOR SHAFTS UNDER
.25
(.010)
1.52
(.06)
15.88
(5/8)
12.7
(.50)
6.35 ± .76
(.25 ± .03)
.38
(.015)
15.88
(5/8)
45 ° X
(.010)
CHAMFER
.25
DIA.
6.35+.03/-.05
(.250+.001/-.002)
DIA.
12.19
(.48)
DEEP
SHAFT SLOT
1.19
WIDE X
(.047)
1.60+.38/-.00
(.063+.015/-.000)
TYP.
12.7
(.50)
2 PLCS.
EACH TERMINAL LUG
WILL ACCOMMODATE
THREE
.81
DIAMETER
(.812 DIA. AWG
STRANDED) WIRES.
(.032)
6.35
(.25)
TYP.
15.88 ± .38
(.625 ± .015)
1.02
(.040)
TYP.
6.35
(.25)
6.35
(.25)
6.35
(.25)
1.40
(.055)
DIA.
9.53
(.375)
10.31
(.406)
DIA.
3.18
(.125)
DIA.
9.53
(.375)
6.73
(.265)
DIA.
3.18
(.125)
DIA.
TOLERANCES EXCEPT AS NOTED:
DECIMALS: .XXX ±
.127
.XX ±
.38
FRACTIONS: ± 1/64
ANGLE: ±
3 %
(.005),
(.015)
6.35
±
.76
(.25
±
.03)
6.35
(.25)
9.53, 22.23
(3/8, 7/8)
.38
(.015)
45
°
X
(.010)
CHAMFER
.25
45
°
X
(.010)
CHAMFER
.25
3.18
±
0.25
(.125
±
.001)
DIA.
SHAFT SLOT
.79
WIDE X
.76
DEEP
(.031)
(.03)
9.53
(.38)
12.7
(1/2)
.38
(.015)
19.05
(.75)
DIA.
DIA.
12.19
(.480)
3.18
±
.025
(.125
±
.001)
DIA.
SHAFT SLOT
.79
WIDE X
.76
DEEP
(.03)
(.031)
6.35
±
.76
(.25
±
.03)
.38
(.015)
9.53
(.38)
12.7
(.50)
DIA.
6.35+.03/-.05
(.250+.001/-.002)
1.19
(.047)
45
°
X
(.010)
CHAMFER
.25
12.19
(.480)
DIA.
1.60+3.81/-.000
(.063+.015/-.000)
DIA.
22.23
(7/8)
STD.
45
°
X
(.010)
CHAMFER
.25
22.23
(7/8)
STD.
12.19
(.480)
DIA.
19.05
(.75)
DIA.
19.05
(.75)
DIA.
6.35
±
.76
(.25
±
.03)
12.7
(.50)
9.53
(.38)
.38
(.015)
DIA.
6.35+.03/-.05
(.250
±
.03)
.79
(.031)
3.18
±
.03
(.125
±
.003)
DIA.
STD.
STD.
6.35
±
.76
(.25
±
.03)
19.05
(.75)
DIA.
DIA.
12.19
(.480)
STD.
STD.
.79
±
.25
(.031
±
.010)
2.36
(.094)
50
°
±
10
°
Product Dimensions
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
SHAFT TYPE
AVAILABLE ONLY IN
(FMS) & DIAMETER MODELS BUSHINGS
12 3/8 ” (9.53 mm) L X 1/8 ” (3.18 mm) D 3851, 3852 C
16 1/2 ” (12.7 mm) L x 1/4 ” (6.35 mm) D 3851, 3852 A
16 1/2 ” (12.7 mm) L x 1/8 ” (3.18 mm) D 3851, 3852 C, E
20 5/8 ” (15.88 mm) L X 1/4 ” (6.35 mm) D 3851, 3852 A, B
28 7/8 ” (22.20 mm) L X 1/4 ” (6.35 mm) D
3851, 3852 A, B
3856 A
3851, 3852 C, E
28 7/8 ” (22.20 mm) L X 1/8 ” (3.18 mm) D 3856 H
BUSHING APPLICABLE MODELS
A Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L 3851, 3852, 3856
B Locking 3/8 ” (9.53 mm) D x 1/2 ” (12.7 mm) L 3851, 3852
C Plain 1/4 ” (6.35 mm) D x 1/4 ” (6.35 mm) L 3851, 3852
E Locking 1/4 ” (6.35 mm) D x 1/2 ” (12.7 mm) L 3851, 3852
H Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L 3856 (3.18 mm D Shaft)
Consult factory for lengths not shown.
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 Solder Lugs, Plain End
2 Solder Lugs, Slotted End
3 Solder Lugs, Flatted Shaft
5 PC Pins, Plain End
6 PC Pins, Slotted End
7 PC Pins, Flatted Shaft
ELEMENT
APPLICABLE MODELS
TAPER/TOLERANCE
A Linear ±10 % 3852, 3856
B Linear ±20 % 3851
C Audio CW ±10 % 3852, 3856
D Audio CW ±20 % 3851
E Linear ±10 % 3851
F Audio CCW ±10 % 3852, 3856
G Audio CCW ±20 % 3851
H Linear ±5 % 3852, 3856
RESISTANCE
CODE/VALUE
(IN OHMS)
Model 3851
(102) 1 K
(252) 2.5 K
(502) 5 K
(103) 10 K
(253) 25 K
(503) 50 K
(104) 100 K
(254) 250 K
(504) 500 K
(105) 1 M
Models 3852/3856
(101) 100
(251) 250
(501) 500
(102) 1 K
(252) 2.5 K
(502) 5 K
(103) 10 K
(253) 25 K
(503) 50 K
(104) 100 K
(254) 250 K
(504) 500 K
(105) 1 M
How To Order
3851/3852/3856 - 3/4 ” Diameter Panel Control
Boldface features are Bourns standard
options. All others are available with higher
minimum order quantities.
REV. 10/08
3852 A - 28 2 - 103 A L
RoHS IDENTIFIER
L Compliant
Blank Non-Compliant

Freelance Electronics
13197 Sandoval Street
Santa Fe Springs, CA 90670

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(Deadline for next day shipment 2:00pm PST)

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Industry since 1986

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