oH
VE S CO
AV R M
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 Characteristics
1
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 Characteristics
1
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
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 Characteristics
1
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.
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
RoHS IDENTIFIER
L
Compliant
Blank Non-Compliant
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
ELEMENT
TAPER/TOLERANCE
A
Linear ±10 %
H
Linear ±5 %
Boldface features are Bourns standard
options. All others are available with higher
minimum order quantities.
REV.
07/08
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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