91A1A-B28-A18 Bourns

Features Available in a variety of pin-out con gurations Virtually in nite electrical circuit isolation Metal or plastic shaft options RoHS compliant* 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 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 (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 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 Coef 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 tapers) 10 ohms or 15 % TRS max.....(All tapers) 5 % TRS max. (whichever is greater) (Audio tapers) 20 % maximum Contact Resistance Variation 50,000 cycles ........................................... (Linear tapers) 2 % .............................................2 % (Audio tapers) 3 % .............................................3 % Moisture Resistance (MIL-STD-202, Method 103, 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. Speci cations are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their speci c applications. *RoHS COMPLIANT Model 91, 92, 93, 94 & 95 - 5/8 Square Single-Turn Panel Control 1 Mechanical Characteristics Stop Strength (1/4 D shaft) .............................................................................................................................................45.19 N-cm (4 lb.-in.) (1/8 D shaft) .............................................................................................................................................33.89 N-cm (3 lb.-in.) Mechanical Angle .................................................................................................................................................................................300 5 Torque Starting ........................................................................................................................................... 0.3 max. above average running torque Running Torque Single or Dual Section (A & R Bushings) .......................................................................................0.21 to 1.06 N-cm (0.3 to 1.5 oz.-in.) Single or Dual Section (C & U Bushings) .......................................................................................0.14 to 1.06 N-cm (0.2 to 1.5 oz.-in.) Mounting .............................................................................................................................................1.7-2.0 N-m (15-18 lb.-in.) maximum Variation ...................................................................................................................... 0.35 N-cm (0.5 oz.-in.) maximum in 45 shaft travel Weight (Single Section, Metal Bushing) ...............................................................................................................................12.7 grams nominal (Each Additional Section) ....................................................................................................................................................4 grams nominal Terminals .................................................................................................................................Printed circuit terminals, J-Hooks 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 ux. Marking ..................................................................................Manufacturers trademark, date code, resistance, manufacturers part number Ganging (Multiple Section Potentiometers) .............................................................................................................................2 cups maximum Hardware ...................One lockwasher and one mounting nut is shipped with each potentiometer, except where noted in the part number. NOTE: 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. Speci cations are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their speci c applications.