Non-RoHS compliant versions are
currently available, although not
recommended for new designs.
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 Characteristics1
3851
3852/3856
Cermet Element
Conductive Plastic 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 ±ꢁ0 ꢀ..........................................±± ꢀ or ±10 ꢀ
Independent Linearity.............................................................................±10 ꢀ..........................................................(A & H tapers) ±± ꢀ
Absolute Minimum Resistance...............................................................ꢁ ohms maximum........................................ ꢁ ohms maximum
Effective Electrical Angle ........................................................................ꢁ±0 ° ±± °.....................................................ꢁ±0 ° ±± °
Contact Resistance Variation .................................................................±1 ꢀ............................................................±ꢂ ꢀ of total resistance or ꢂ ohms
(whichever is greater)
Dielectric Withstanding Voltage (MIL-STD-ꢁ0ꢁ, Method ꢂ01)
Sea Level............................................................................................900 VAC minimum.......................................900 VAC minimum
70,000 Feet ........................................................................................ꢂ±0 VAC minimum.......................................ꢂ±0 VAC minimum
Insulation Resistance (±00 VDC) ............................................................1,000 megohms minimum...........................1,000 megohms minimum
Power Rating (Voltage Limited By Power Dissipation or ꢂ±0 VAC, Whichever Is Less)
+70 °C ...............................................................................................(Linear tapers) 1 watt...................................(Linear tapers) ꢁ watts
(Audio tapers) 0.± watt
(Audio tapers) 1 watt
+1ꢁ± °C ..............................................................................................0 watt
+1±0 °C ...................................................................................................................................................................0 watt
Theoretical Resolution............................................................................Essentially infinite........................................Essentially infinite
Environmental Characteristics1
Operating Temperature Range ...............................................................-1 °C to +1ꢁ± °C..........................................-1 °C to +1ꢁ± °C
Storage Temperature Range...................................................................-6± °C to +1ꢁ± °C........................................-6± °C to +1±0 °C
Temperature Coefficient Over Storage Temperature Range...................±1,000 ppmꢃ°C............................................±1±0 ppmꢃ°C
Vibration..................................................................................................ꢁ0 G.............................................................ꢁ0 G
Total Resistance Shift.........................................................................±ꢁ ꢀ maximum...........................................±ꢁ ꢀ maximum
Voltage Ratio Shift..............................................................................±± ꢀ maximum...........................................±6 ꢀ maximum
Shock......................................................................................................100 G...........................................................100 G
Total Resistance Shift.........................................................................±ꢁ ꢀ maximum...........................................±ꢁ ꢀ maximum
Voltage Ratio Shift..............................................................................±± ꢀ maximum...........................................±6 ꢀ maximum
Load Life.................................................................................................1,000 hours .................................................1,000 hours
Total Resistance Shift.........................................................................±10 ꢀ maximum.........................................±ꢂ ꢀ maximum
Rotational Life (No Load)........................................................................100,000 cycles ............................................±0,000 cycles
Total Resistance Shift.........................................................................±1± ꢀ TRS maximum ................................±± ꢀ or ± ohms TRS whichever is greater
Contact Resistance Variation.............................................................±ꢂ ꢀ............................................................±ꢂ ꢀ
Moisture Resistance (MIL-STD-ꢁ0ꢁ, Method 10ꢂ, Condition B)
Total Resistance Shift.........................................................................±10 ꢀ maximum ........................................±ꢁ ꢀ maximum
IP Rating.................................................................................................IP 40 ............................................................IP 40
Mechanical Characteristics1
Stop Strength ..............................................................................................................................................................................................±6.± N-cm (± lb.-in.)
Mechanical Angle ....................................................................................................................................................................ꢁ80 ° ±± ° ꢃ ꢂ8±6 ꢄ 1ꢂ±0 ° ±±0 °
Torque (Starting and Running) ..............................................................................................................A & B bushings 0.ꢂ± to 4.ꢁꢂ N-cm (0.0± to 6.0 oz.-in.)
C & E bushings 0.ꢁ1 to 4.ꢁꢂ N-cm (0.ꢂ to 6.0 oz.-in.)
ꢂ8±6 ꢄ 0.11 to ꢁ.1ꢁ N-cm (0.1± to ꢂ.0 oz.-in.)
Mounting (Torque on Bushing)......................................................................................................................................1.7-ꢁ.0 N-m (1±-18 lb.-in.) maximum
Weight (Single Section) ................................................................................................................................................................................ꢂ0 grams maximum
Terminals ........................................................................................................................................................................Printed circuit terminals or solder lugs
Soldering Condition ......................................................................Recommended hand soldering using Sn9±ꢃAg± no clean solder, 0.0ꢁ± ” wire diameter.
Maximum temperature ꢂ99 °C (7±0 °F) for ꢂ seconds. No wash process to be used with no clean flux.
Part can be wave soldered at ꢁ60 °C (±00 °F) for ± 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.
1AT 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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