3856A-285-102AL datasheet, PDF

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3856A-285-102AL: DescriptionPotentiometer, Cermet, 2W, 1000ohm, 10% +/-Tol, -150,150ppm/Cel,; CategoryPassive components The resistor; File Size232KB，3 Pages; ManufacturerBourns; Websitehttp://www.bourns.com; Environmental Compliance

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3856A-285-102AL Overview

Potentiometer, Cermet, 2W, 1000ohm, 10% +/-Tol, -150,150ppm/Cel,

3856A-285-102AL Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Bourns
package instruction	Panel Mount,
Reach Compliance Code	_compli
Actuator direction	HORIZONTAL
Actuator type	SHAFT
structure	Circul
gang number	1
Installation features	THROUGH HOLE MOUNT
Number of terminals	3
number of turns	3.75
Maximum operating temperature	125 °C
Minimum operating temperature	-1 °C
Package diameter	19.05 mm
Package length	6.35 mm
Package form	Panel Mou
Rated power dissipation(P)	2 W
Rated temperature	70 °C
resistance	1000 Ω
resistance law	LINEAR
Resistor type	POTENTIOMETER
rotation angle	250 deg
surface mount	NO
technology	CERMET
Temperature Coefficient	150 ppm/°C
Terminal shape	FLAT
Tolerance	10%

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Features

■

Single-turn (3851 and 3852)

Linear and audio tapers

3-3/4-turn (3856)

Wide resistance range

Minimal depth package

Good resolution

3851/3852/3856 - 3/4 ” Diameter Panel Control

Initial Electrical Characteristics

3851

Conductive Plastic Element

3852/3856

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

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

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.

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.

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