Features
Metal shaft and bushing
Consistent, smooth quality feel
Up to 4 sections available
Rotary switch option designed
for on-off function control
RoHS compliant*
81/82 - 5/8 Square Single-Turn Panel Control
85/86 - 5/8 Square Single-Turn Panel Control with Rotary Switch
Potentiometer Speci cations
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Initial Electrical Characteristics Conductive Plastic Element Cermet Element
Standard Resistance Range
Linear Tapers (A, B, E, & H) ..................................................................(B & E) 1 K ohms to 1 megohm ............. (A & H) 100 ohms to 1 megohm
Audio Tapers (C, D, F, G, S, & T) .........................................................(D, G, S, & T) 1 K ohms to 1 megohm ... (C & F) 1 K ohms to 1 megohm
Total Resistance Tolerance .........................................................................20 % or 10 % ...................................... 10 % or 5 %
Independent Linearity .................................................................................5 % ...................................................... 5 %
Absolute Minimum Resistance ...................................................................2 ohms maximum .................................. 2 ohms maximum
E ective Electrical Angle ............................................................................(Linear tapers) 240 5 ...................... (Linear tapers) 240 6
(Audio tapers) 225 5 ...................... (Audio tapers) 225 6
Contact Resistance Variation .....................................................................1 % ...................................................... 1 % or 3 ohms (whichever is greater)
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level ..............................................................................................1,500 VAC minimum .............................. 1,500 VAC minimum
70,000 Feet ..........................................................................................500 VAC minimum ................................. 500 VAC minimum
Insulation Resistance (500 VDC) ................................................................1,000 megohms minimum ..................... 1,000 megohms minimum
Power Rating At 70 C (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less)
+70 C Single Section Assembly .........................................................(Linear tapers) 1 watt ............................. (Linear tapers) 2 watts
(Audio tapers) 0.5 watt .......................... (Audio tapers) 1 watt
+70 C Multiple Section Assembly.......................................................(Linear tapers) 0.5 watt/section ............. (Linear tapers) 1 watt/section
(Audio tapers) 0.25 watt/section ........... (Audio tapers) 0.5 watt/section
+125 C ................................................................................................0 watt ..................................................... 0 watt
Theoretical Resolution ................................................................................Essentially in nite .................................. Essentially in nite
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Environmental Characteristics
Operating Temperature Range ...................................................................-40 C to +125 C .................................. -40 C to +125 C
Storage Temperature Range ......................................................................-55 C to +125 C .................................. -55 C to +125 C
Temperature Coe cient Over Storage Temperature Range ......................1,000 ppm/C ...................................... 150 ppm/C
Vibration (Single Section) ...........................................................................15 G ....................................................... 15 G
Total Resistance Shift ...........................................................................2 % maximum ..................................... 2 % maximum
Voltage Ratio Shift ................................................................................5 % maximum ..................................... 5 % maximum
Shock (Single Section) ...............................................................................30 G ....................................................... 30 G
Total Resistance Shift ...........................................................................2 % maximum ..................................... 2 % maximum
Voltage Ratio Shift ................................................................................5 % maximum ..................................... 5 % maximum
Load Life .....................................................................................................1,000 hours ........................................... 1,000 hours
Total Resistance Shift ...........................................................................10 % maximum ................................... 5 % maximum
Rotational Life (No Load) ............................................................................100,000 cycles ...................................... 100,000 cycles
Total Resistance Shift ...........................................................................(Linear taper) 10 ohms or ..................... (All tapers) 5 % TRS maximum
10 % TRS max. (whichever is greater)
(Audio taper) 20 % maximum
Contact Resistance Variation @ 50,000 cycles
(Audio taper) ..................................................................................3 % ...................................................... 3 %
(Linear taper) .................................................................................2 % ...................................................... 2 %
Moisture Resistance (MIL-STD-202, Method 103, Condition B)
Total Resistance Shift ...........................................................................(B & E tapers) 10 % maximum ........... 5 % maximum (all tapers)
(D, G, S & T tapers) 20 % maximum
Insulation Resistance (500 VDC) ..........................................................100 megohms minimum ........................ 100 megohms minimum
IP Rating .....................................................................................................IP40 ....................................................... IP40
Mechanical Characteristics
Stop Strength
1/4 and 1/8 diameter shafts .............................................................................................. ........................................................... 45.19 N-cm (4 lb.-in.)
7/8 length shaft ........................................................................................................... ...................................................................... 22.6 N-cm (2 lb.-in.)
Mechanical Angle ...................................................................................................................................................................................................... 300 5
Torque
Starting and Running Torque (Non-Locking Bushings)
Single Section .................................................................................................................................................................0.14 to 1.06 N-cm (0.2 to 1.5 oz.-in.)
Dual Section ....................................................................................................................................................................0.14 to 1.06 N-cm (0.2 to 1.5 oz.-in.)
Triple Section ...................................................................................................................................................................0.35 to 1.41 N-cm (0.5 to 2.0 oz.-in.)
Quadruple Section ..........................................................................................................................................................0.35 to 1.41 N-cm (0.5 to 2.0 oz.-in.)
Starting and Running Torque (Locking Bushings) .....................................................................................................0.14 to 2.82 N-cm (0.2 to 4.0 oz.-in.)
Shaft Locking Torque with Locknut @ 10 in-lb. (B & E Bushings) ........................................................................................................ 14 N-cm (20 oz-in.)
Mounting ...................................................................................................................................................................1.7-2.0 N-m (15-18 lb.-in.) maximum
Weight (Single Section).............................................................................................................................................................................. 21 grams maximum
(Each Additional Section) ...................................................................................................................................................................... 6 grams maximum
Terminals .......................................................................................................................................................................... Printed circuit terminals or J-Hooks
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 ux.
Marking ..........................................................................Manufacturers trademark, wiring diagram, date code and resistance, manufacturers part number
Ganging (multiple section potentiometers) ..................................................................................................................................................... 4 cup maximum
Hardware ...........................................One lockwasher and one mounting nut is shipped with each potentiometer, except where noted in the part number.
For dimensional drawings see pages 3 & 4.
For ordering information see page 5.
NOTE: Model 81/82 performance speci cations do not apply to units subjected to printed circuit board cleaning procedures.
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At room ambient: +25 C nominal and 50 % relative humidity nominal, except as noted.
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
WARNING
Specications are subject to change without notice. Users should verify actual device performance in their specic
Cancer and Reproductive Harm
applications. The products described herein and this document are subject to specic legal disclaimers as set forth on the
www.P65Warnings.ca.gov
last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
*RoHS COMPLIANT81/82 - 5/8 Square Single-Turn Panel Control
85/86 - 5/8 Square Single-Turn Panel Control with Rotary Switch
Rotary Switch Speci cations
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Initial Electrical Characteristics
Contacts:
DPST ...............................................................................................................................................................................N.O/N.O.,N.C./N.C. or N.O./N.C.
Power Rating (Resistive Load):
DPST ............................................................................................................ 2 A @ 125 volts RMS-60 Hz or 2 A @ 28 VDC, 1 A @ 250 volts RMS-60 Hz
Contact Resistance (0.1 VDC-10 mA) ..................................................................................................................................................... 10 milliohms nominal
Contact Bounce ................................................................................................................................................................................ 5 milliseconds maximum
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level ............................................................................................................................................................................................. 1500 VAC minimum
Insulation Resistance ....................................................................................................................................................................... 1000 megohms minimum
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Environmental Characteristics
Operating Temperature Range ....................................................................................................................................................................... -40 C to +70 C
Storage Temperature Range ........................................................................................................................................................................ -65 C to +125 C
Vibration (Dual Section) ....................................................................................................................................................................................................... 8 G
(Triple Section) .................................................................................................................................................................................................... 5 G
(Quadruple Section) ........................................................................................................................................................................................... 3 G
Contact Resistance ........................................................................................................................................................................ 10 milliohms maximum
Contact Bounce ......................................................................................................................................................................... 0.1 millisecond maximum
Shock (Dual Section) ......................................................................................................................................................................................................... 20 G
(Triple Section) ...................................................................................................................................................................................................... 15 G
(Quadruple Section) ............................................................................................................................................................................................. 10 G
Contact Resistance ........................................................................................................................................................................ 10 milliohms maximum
Contact Bounce ......................................................................................................................................................................... 0.1 millisecond maximum
Rotational Life .....................................................................................................................................................................................................25,000 cycles
Switch Actuating Torque (50% Duty cycle @ Rated Power Load) ..................................................................................1.41 to 4.94 N-cm (2 to 7 oz.-in.)
Contact Resistance ...................................................................................................................................................................... 100 milliohms maximum
Moisture Resistance (MIL-STD-202, Method 106, Condition B)
Contact Resistance (0.1 VDC-10 mA) ............................................................................................................................................ 10 milliohms maximum
Insulation Resistance (After 24 Hours @ Room Temperature) (500 VDC) .................................................................................... 100 megohms minimum
Switch Housing Material ................................................................................................................. High temperature, ame retardant, thermosetting plastic
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Mechanical Characteristics
Actuating Torque (Each Section, Switch Module Only) .......................................................................................................3.53 to 10.6 N-cm (5 to 15 oz.-in.)
Running Torque (Out of Detent, 2-4 Module Assembly) .....................................................................................................0.21 to 1.41 N-cm (0.3 to 2 oz.-in.)
Detent ..................................................................................................................................................................................................... CW or CCW standard
Actuation Angle ...................................................................................................................................................................................................................25
Contact Materials ..........................................................................................................................................................................Fine silver with gold overlay
Terminal Styles .................................................................................................................................................................................................. Solder lug only
Standard Orientation ..............................................................................................................................................................In-line with control terminals
Optional ..........................................................................................................................................................................Rotated 90 CCW from standard
Terminal Strength (Before and After Soldering Heat Exposure) .......................................................................................................... 0.9 Kg (2 lbs.) minimum
NOTE: Model 81/82 performance speci cations do not apply to units subjected to printed circuit board cleaning procedures.
1
At room ambient: +25 C nominal and 50 % relative humidity nominal, except as noted.
Specications are subject to change without notice.
Users should verify actual device performance in their specic applications.
The products described herein and this document are subject to specic legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.