Features n Virtually infinite electrical circuit isolation n Metal or plastic shaft options n DPST and DPDT switch options n RoHS compliant* Model 97 & 99 5/8 Square Single-Turn Panel Control with Rotary Switch Potentiometer Specifications 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 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) ....................................... 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 1 Electrical specifications tested at 200 RPM, at room ambient: +25 C nominal. *RoHS Directive 2015/863, Mar 31, 2015 and Annex. WARNING Specifications are subject to change without notice. Users should verify actual device performance in their specific Cancer and Reproductive Harm applications. The products described herein and this document are subject to specific 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. Model 97 & 99 5/8 Square Single-Turn Panel Control with Rotary Switch Potentiometer Specifications 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 flux. 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 (Bushing A: H-37-2 & H-38-2 Bushing C: H-37-1 & H-38-1 Bushing R: H-37-4 & H-38-9) NOTE: Performance specifications do not apply to units subjected to printed circuit board cleaning procedures. 1 Electrical specifications tested at 200 RPM, at room ambient: +25 C nominal. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.