Non-RoHS models are currently
available, but not recommended
for new designs. See Product
Obsolescence Memo for details.
Features
■ Available in a variety of pin-out
configurations
■ Virtually infinite electrical circuit isolation
■ Metal or plastic shaft options
■ RoHS compliant versions available*
Model 91, 92, 93, 94 & 95 - 5/8 ” Square Single-Turn Panel Control
1
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...............................10 % or 20 %.................................................... 5% or 10%
Independent Linearity....................................... 5 %.................................................................. 5 %
Absolute Minimum Resistance.........................2 ohms maximum.............................................. 2 ohms maximum
Effective Electrical Angle..................................(Linear tapers) 240 ° 5 °.................................. (Linear tapers) 240 ° ꢀ °
(Audio tapers) 225 ° 5 °.................................. (Audio tapers) 225 ° ꢀ °
Contact Resistance Variation ........................... 1 %.................................................................. 1 % or ꢁ ohms (ꢂhichever is greater)
Dielectric Withstanding Voltage (MIL-STD-202, Method ꢁ01)
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
Poꢂer Rating (Voltage Limited By Poꢂer Dissipation or ꢁ50 VAC, Whichever Is Less)
+70 °C Single Section Assembly................(Linear tapers) 0.5 ꢂatt...................................... (Linear tapers) 2 ꢂatts
(Audio tapers) 0.25 ꢂatt .................................... (Audio tapers) 1 ꢂatt
+70 °C Multiple Section Assembly .............(Linear tapers) 0.5 ꢂatt/section......................... (Linear tapers) 1 ꢂatt/section
(Audio tapers) 0.25 ꢂatt/section ....................... (Audio tapers) 0.5 ꢂatt/section
+125 °C.......................................................0 ꢂatt................................................................. 0 ꢂatt
Theoretical Resolution......................................Essentially infinite.............................................. Essentially infinite
1
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 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)....................................... ꢁ0 G......................................................................ꢁ0 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 tapers) 10 ohms or 15 % TRS max.......(All tapers) 5 % TRS max.
(ꢂhichever is greater)
(Audio tapers) 20 % maximum
Contact Resistance Variation
@ 50,000 cycles ........................................... (Linear tapers) 2 %............................................. 2 %
(Audio tapers) ꢁ %............................................. ꢁ %
Moisture Resistance (MIL-STD-202, Method 10ꢁ, Condition B)
Total Resistance Shift................................... (Linear tapers) 10 % TRS maximum .................(All tapers) 5 % TRS maximum
(Audio tapers) 20 % TRS maximum
Insulation Resistance (500 VDC).................. 100 megohms minimum ......................................100 megohms minimum
IP Rating ............................................................ IP 40 .....................................................................IP 40
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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