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VE S CO
AV R M
AI SIO PL
LA N IA
BL S NT
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Features
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Metal shaft and bushing
Consistent, smooth quality feel
Up to 4 sections available
Rotary switch option designed
for “on-off” function control
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RoHS compliant versions available*
*R
81/82 - 5/8 ” Square Single-Turn Panel Control
85/86 - 5/8 ” Square Single-Turn Panel Control with Rotary Switch
Potentiometer Specifications
Initial Electrical Characteristics
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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
Effective 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) 0.5 watt................................(Linear tapers) 2 watts
(Audio tapers) 0.25 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 infinite ........................................Essentially infinite
Environmental Characteristics
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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 Coefficient 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 ±10 % TRS max. .(All tapers) ±5 % TRS maximum
(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 .................................................................................................IP 40 ............................................................IP 40
Mechanical Characteristics
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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 flux.
Marking ............................................................................Manufacturer’s trademark, wiring diagram, date code and resistance, manufacturer’s 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 specifications 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 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.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
