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oH V SC AV ER OM AI SIO PL LA N IA BL S NT E
Features

Small diameter Wide resistance range Good resolution Linear tapers Cermet element
*R
3862 - 1/2 " Diameter Single-Turn Panel Control
Initial Electrical Characteristics1
Standard Resistance Range..................................................................................................................................................................100 ohms to 1 megohm Total Resistance Tolerance ................................................................................................................................................................................(A Taper) 10 % (H Taper) 5% Independent Linearity ........................................................................................................................................................................................................5 % Absolute Minimum Resistance........................................................................................................................................................................2 ohms maximum Effective Electrical Angle ..........................................................................................................................................................................................260 10 Contact Resistance Variation ................................................................................................................................................................3 % of total resistance Dielectric Withstanding Voltage (MIL-STD-202, Method 301) Sea Level ..................................................................................................................................................................................................750 VAC minimum 70,000 Feet ................................................................................................................................................................................................350 VAC minimum Insulation Resistance (500 VDC)........................................................................................................................................................1,000 megohms minimum Power Rating (Voltage Limited by Power Dissipation or 350 VAC, Whichever is Less) +70 C............................................................................................................................................................................................................................1 watt +125 C..........................................................................................................................................................................................................................0 watt Theoretical Resolution ....................................................................................................................................................................................Essentially infinite
Environmental Characteristics1
Operating Temperature Range..........................................................................................................................................................................-1 C to +125 C Storage Temperature Range ..........................................................................................................................................................................-65 C to +125 C Temperature Coefficient Over Storage Temperature Range ..................................................................................................................................150 ppm/C Vibration ..............................................................................................................................................................................................................................20 G Total Resistance Shift ....................................................................................................................................................................................2 % maximum Voltage Ratio Shift ........................................................................................................................................................................................6 % maximum Shock ..................................................................................................................................................................................................................................50 G Total Resistance Shift ....................................................................................................................................................................................2 % maximum Voltage Ratio Shift ........................................................................................................................................................................................6 % maximum Load Life ..................................................................................................................................................................................................................1,000 hours Total Resistance Shift ....................................................................................................................................................................................3 % maximum Rotational Life (C & N Bushing) No Load ..............................................................................................................................................................50,000 cycles Total Resistance Shift ....................................................................................................................................................................................5 % maximum Contact Resistance Variation..........................................................................................................................................................................................3 % Moisture Resistance (MIL-STD-202, Method 106, Condition B) Total Resistance Shift ....................................................................................................................................................................................2 % maximum Insulation Resistance (500 VDC) ......................................................................................................................................................100 megohms minimum Salt Spray ....................................................................................................................................................................MIL-STD-202, Method 101, Condition A IP Rating ..............................................................................................................................................................................................................................IP 40
Mechanical Characteristics1
Stop Strength ................................................................................................................................................................................33 N-cm (3 lb.-in.) maximum Mechanical Angle ........................................................................................................................................................................................................295 3 Torque Starting and Running ............................................................................................................................................................3.53 N-cm (5 oz.-in.) maximum Mounting (Torque on Bushing) ......................................................................................................................................1.7-2.0 N-m (15-18 lb.-in.) maximum Shaft Locking Torque with Locking Bushings ....................................................................................................................................14.12 N-cm (20 oz.-in.) Weight (Single Section) ................................................................................................................................................................................25 grams maximum (Each Additional Section) ........................................................................................................................................................................................................ Terminals ....................................................................................................................................................................................Printed circuit pins or J-Hooks Soldering Condition ......................................................................Recommended hand soldering using Sn85/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, date code, resistance, manufacturer's part number Ganging..............................................................................................................................................................................................................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.
*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.
3862 - 1/2 " Diameter Single-Turn Panel Control
Product Dimensions
PCB LAYOUT
5.08 (.200) 3.04 (.120) 2.54 (.100) TYP. 5.08 (.200) 45 6.22 (.245) 6.73 (.265) DIA. 2.44 .13 (.096 + .005/ - .000) DIA. 2 PLCS.
PANEL LAYOUT
6.22 (.245)
3862E/T
11.51 .41 (.453 .016) 12.07 .76 (.475 .030) 12.7 .41 DIA. (.500 .016)
15.88 3862C/N STD. (5/8) .89 .25 11.51 .41 3.18 .03 (.035 .010) (.453 .016) DIA. 2 PLCS. (.125 .001) 12.07 .76 L .79 (.475 .030) (.031)
9.53, 22.23 STD. (3/8, 7/8) .89 .25 3.18 .03 (.035 .010) DIA. (.125 .001) 2 PLCS. L .79 2.38 (.031) (.094)
Shaft End Detail 3862
45 15 2.31 2 PLCS. (.091)
DIA. 12.7 .41 (.500 .016) .41 .41 45 5 X 45 5 X 6.25 (.016) (.016) 6.25 -32 UNEF - 2A -32 UNEF - 2A (1/4) 6.35 3.3 .79 .25 (1/4) .79 .25 POSITION OF SLOTS VARIABLE OPTIONAL FLAT LONG OR (.250) (.13) 16.88(.031 .010) (.031 .010) 9.53 12.7 L= FOR "T" BUSHING, FOR "E" BUSHING FROM BUSHING FOR SHAFTS UNDER (5/8) (.375) (.500) 6.35 9.65 L= FOR "C" BUSHING, FOR "N" BUSHING (.250) (.380)
6.22 (.245) 2 PLCS. C OF LUG L
.25 (.010) 2 PLCS. 32-1/2 10 FLAT ORIENTATION @ CCW END SLOTS ARE NOT ORIENTED
PC PIN TERMINAL
3.04 (.12) 2 3 5.08 (.20) 5.08 (0.20) 1 2.54 (0.10) .723 (.0285) 12.06 .762 (.475 .03)
J-HOOK TERMINAL
4.953 REF ONLY (.195) 2 3 8.89 (.35) 5.08 (0.20) 1 2.54 (0.10) .762 (.03) TYP. 2.286 (.09) TYP.
DIMENSIONS ARE:
MM (INCHES)
6.53 (.250) MAX.
Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.
How to Order 3862 Series Panel Controls
3862 C 28 2 102 A L
12 16 20 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 1/8 (3.18 mm) D 5/8 " (15.88 mm) L x 1/8 " (3.18 mm) D 7/8 " (22.20 mm) L X 1/8 " (3.18 mm) D
BUSHINGS C C C, E, N, T C, E, N, T
Consult factory for lengths not shown.
C E N T
BUSHING 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 1/4 " (6.35 mm) D x 3/8 " (9.53 mm) L Locking 1/4 " (6.35 mm) D x 3/8 " (9.53 mm) L
RESISTANCE CODE/VALUE (IN OHMS) (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
TERMINALS L RoHS Compliant Blank Standard
MODEL 3862 1/2 (12.7 mm) D Single-Turn Cermet
1 2 3 5 6 7
TERMINAL STYLE AND SHAFT TYPE Solder Lugs, Plain End Solder Lugs, Slotted End Solder Lugs, Flatted Shaft PC Pins, Plain End PC Pins, Slotted End PC Pins, Flatted End
A H
ELEMENT TAPER/TOLERANCE Linear -10 % Linear 5 %
Boldface features are Bourns standard options. All others are available with higher minimum order quantities.
REV. 06/06 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.

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