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Features

■

Small diameter

■

Wide resistance range

■

Good resolution

■

Linear tapers

■

Cermet element

3862 - 1/2 ” Diameter Single-Turn Panel Control

Initial Electrical Characteristics

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 % or 6 ohms (whichever is greater)

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 Characteristics

Operating Temperature Range ...................................................................................................................................................... -40 °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

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 Characteristics

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

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)

6.325

(.249)

6.731

(.265)

DIA.

2.438

.127 / -0.000

(.096 + .005 / - .000)

DIA. 2 PLCS.

PANEL LAYOUT

6.325

(.249)

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

.79 (.475

.030)

(.031)

DIA. 12.7

.41

(.500

.016)

9.53, 22.23

STD.

(3/8, 7/8)

.89

.25

3.18

.03

(.035

.010)

DIA.

(.125

.001)

2 PLCS.

.79

2.38

(.031)

(.094)

Shaft End Detail

3862

° ±

2.31

2 PLCS.

(.091)

.41

° ±

6.25

(.016) 6.25

(.016)

-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

FOR "T" BUSHING,

FOR "E" BUSHING

FROM BUSHING FOR SHAFTS UNDER (5/8)

(.375)

(.500)

6.35

9.65

FOR "C" BUSHING,

FOR "N" BUSHING

(.250)

(.380)

6.22

(.245)

2 PLCS.

C OF LUG

.25

(.010)

2 PLCS.

32-1/2

° ±

FLAT ORIENTATION

@ CCW END

SLOTS ARE

NOT ORIENTED

PC PIN TERMINAL

3.04

(.12)

5.08

(.20)

5.08

(0.20)

2.54

(0.10)

.723

(.0285)

12.06 ± .762

(.475 ± .03)

J-HOOK TERMINAL

4.953

REF ONLY

(.195)

8.89

(.35)

5.08

(0.20)

2.54

(0.10)

.762

(.03)

TYP.

2.286

(.09)

TYP.

CCW

POTENTIOMETER

6.53

(.250)

MAX.

DIMENSIONS:

(INCHES)

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

102

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

RESISTANCE

CODE/VALUE

(IN OHMS)

BUSHINGS

C, E, N, T

(101)

(251)

(501)

(102)

(252)

(502)

(103)

(253)

(503)

(104)

(254)

(504)

(105)

100

250

500

2.5K

10K

25K

50K

100K

250K

500K

RoHS IDENTIFIER

Compliant

Consult factory for lengths not shown.

ELEMENT

TAPER/TOLERANCE

Linear ±10 %

Linear ±5 %

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

MODEL

3862 1/2 ” (12.7 mm) D Single-Turn Cermet

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

Boldface features are Bourns standard

options. All others are available with higher

minimum order quantities.

REV. 04/11

Speciﬁcations are subject to change without notice.

Customers should verify actual device performance in their speciﬁc applications.