Features n Available in a variety of pin-out configurations n Virtually infinite electrical circuit isolation n Metal or plastic shaft options n RoHS compliant* Model 91, 92, 93, 94 & 95 - 5/8 Square Single-Turn Panel Control Initial Electrical Characteristics1 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 Environmental Characteristics1 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 Moisture Sensitivity Level................................... 1........................................................................... 1 ESD Classification (HBM)................................... N/A....................................................................... N/A WARNING Cancer and Reproductive Harm www.P65Warnings.ca.gov *RoHS Directive 2015/863, Mar 31, 2015 and Annex. 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. Model 91, 92, 93, 94 & 95 - 5/8 Square Single-Turn Panel Control Mechanical Characteristics1 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 Angle300 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.) Mounting1.7-2.0 N-m (15-18 lb.-in.) maximum Variation0.35 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 TerminalsPrinted circuit terminals, J-Hooks or solder lugs Soldering ConditionRecommended 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. MarkingManufacturer's trademark, date code, resistance, manufacturer's part number. Ganging (Multiple Section Potentiometers) 2 cups maximum HardwareOne 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; Bushing U: H-37-3 & H-38-8) NOTE: Performance specifications do not apply to units subjected to printed circuit board cleaning procedures. 1Electrical 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. Model 91, 92, 93, 94 & 95 - 5/8 Square Single-Turn Panel Control Product Dimensions MOUNTING SURFACE L 22.860.43 (.900.017) 15.88 (.625) DIA. 13.720.38 (.540.015) 12.70.229 (.500.009) 7.92 (.312) 1.370.08 (.054.003) 2.360.08 (.093.003) 0.79.025 (.031.010) .79 (.031)2PLCS. .254 (.010) GAP 3 2 1 SEE HOWTOORDER CHARTFOR BUSHINGOPTIONS. 10.160.30 (.400.012) R2 MOUNTING SURFACE 22.860.43 (.900.017) 12.70.229 (.500.009) 0.79.025 (.031.010) DIA. 0.810.05 (.032.002) 10.160.30 (.400.012) R2 R1 1 3 5.080.38 (.200.015) 11.050.20 (.435.008) 2 3 7.92 (.312) 2 .81 (.032) R.MAX. 5.33.76 (.21.03) 3.81 (.150) MAX.TYP. 1.19 R (.047) "A"STYLE A.R.LUG 9.53 (.375) 12.71.02 (.500.040) 2.54 (.100) SEE NEXTPAGE FORSHAFT OPTIONS. 1 1.52 (.06) GAP 3 2 1 15.88 (.625) 1.370.08 (.054.003) 2.360.08 (.093.003) SEE HOWTOORDER CHARTFOR BUSHINGOPTIONS. 0.810.05 (.032.002) 2.54 (.100) DIA. 13.720.38 (.540.015) L 1.52 (.06) 15.290.56 (.602.022) 2.54 (.100) SEE NEXTPAGE FORSHAFT OPTIONS. 1 2 3 5.08 (.20) 9.53 (.375) 11.050.20 (.435.008) R1 1 2 3 1.19 (.047) "A"STYLE A.R.LUG R 2.54 (.100) 1205STD. FLATORIENTATION (SHAFTATCCWEND) 0.810.05 (.032.002) 1 CCW 3 2 POTENTIOMETER 5.081.02 (.200.040) 5.59.20 (.220.008) 4.45.38 (.175.015) 10.16 (.40) 1 2 3 3 2 1 4.45.38 (.175.015) DIMENSIONS: 2.54 (.100) 2.54 (.100) 2.03 (.080) 3PLCS. .41 (.016) 2.29 1.02 (.040)WIDEX(.090)LONG 3PLCS. MM (INCHES) .381 TOLERANCESEXCEPTASSHOWN:DECIMAL.XXX(.015)FRACTION1/64 9.65 .XX ANGLE5 (.38) 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. Model 91, 92, 93, 94 & 95 - 5/8 Square Single-Turn Panel Control Product Dimensions Plastic Shaft Styles SHAFT TYPE "B" (USES BUSHING A) SHAFT TYPE "D" (USES BUSHING C) 1.60+.38/-.00 (.063+.015/-.000) 3.16+.00/-.15 DIA. (.1245+.000/-.006) 6.32+.000/-.152 (.249+.000/.006) DIA. 1.19 (.047) 12.70 (.500) STD. LENGTHS: 15.88 19.05 (.625) (.750) 22.23 (.875) SHAFT TYPE "C" (USES BUSHING A) 1.80 .25 (0.07 .001) 16.0 (.630) 14.27 .25 (.562 .010) 48 TOOTH 25.40 (1.00) SHAFT TYPE "S" (USES BUSHING R) 6.32+.010/-.025 (.2490+.0004/.0010) DIA "F" .381 ("F" .015) 5.486 .051 (.216 .002) STD. LENGTHS: 19.05 (.750) 6.31+.025/-.051 (.2485+.001/.002) DIA. STD. LENGTHS: 22.0 (.866) SHAFT TYPE "H" (USES BUSHING A) 6.32+.010/-.025 (.2490+.0004/.0010) DIA 22.23 (.875) 25.4 (1.000) 0.79 0.25 (.031 .010) 3.16 (.1245) DIA STD. LENGTHS: STD. LENGTHS: 19.05 (.750) 16.0 (.630) 22.23 (.875) 7.95 (.313) 1.80 0.25 (.071 .010) 12.0 (.500) 16.0 (.625) 6.99 (.275) 19.0 (.750) 1.50 0.25 (.059 .010) 1.00 0.13 (.039 .054) 1.60+.38/-.00 (.063+.015/-.000) 6.32+.010/-.025 (.2490+.0004/.0010) DIA. 16.0 (.630) STD. LENGTHS: 22.0 (.866) 16.0 (.630) STD. LENGTHS: 15.88 19.05 (.625) (.750) 22.0 (.866) .02 (.050) .005 .XXX = (.127) .0005 .XXXX = (.0127) TOLERANCES EXCEPT AS SHOWN: .XX = 1.194 (.047) 12.70 (.500) 3.99+.000/-.035 (.1571+.0000/.0010) DIA 0.79 0.13 (.031 .054) STD. LENGTHS: SHAFT TYPE "G" (USES BUSHING A) 12.98 (.511) SHAFT TYPE "V" (USES BUSHING U) 6.00+.000/-.035 (.2362+.0000/.0010) DIA STD. LENGTHS: 22.0 (.866) FLAT LENGTH "F": 11.13 (.438) SHAFT TYPE "J" (USES BUSHING R) 0.79 (.031) 6.000+.000/-.035 (.2362+.0000/.0014) DIA 3.988 .076 (.157 .003) FLAT LENGTH "F": SHAFT TYPE "E" (USES BUSHING C) 22.0 (.866) 5.994 +0.000/-0.051 (.236 +.000/-.002) DIA. "F" .38 ("F" .015) 3.988 +0.000/-0.051 (.157 +.000/-.002) DIA. SHAFT TYPE "W" (USES BUSHING A) 1.00 (.04) 16.0 (.630) SHAFT TYPE "A" (USES BUSHING A) 15.88 (.625) STD. LENGTHS: STD. LENGTHS: STD. LENGTHS: 19.05 22.23 (.750) (.875) 12.70 (.500) .79 (0.03) STD. LENGTHS: 12.70 15.88 19.05 (.500) (.625) (.750) 6.30+.000/-.152 (.248+.000/.006) DIA. 5.49 (.216) 1.50 .25 (0.06 .001) SHAFT TYPE "R" (USES BUSHING R) 11.18 .38 (.440 .015) Metal Shaft Styles SHAFT TYPE "T" (USES BUSHING U) 22.23 (.875) DIMENSIONS: MM (INCHES) 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. Model 91, 92, 93, 94 & 95 - 5/8 Square Single-Turn Panel Control Suggested Panel Layout LOCKWASHER H-37-1 7.75 (.305) OPTIONAL: OPTIONAL: Hardware 2.79 DIA. (.110) DIM A NUT H-38-1 6.6 (.26) 9.53 +0/-0.38 (.375 +0/-.015) 2.36 0.25 (.093 .01) 1/4-32 UNEF BUSHING DIM A A 9.91 (.39) C 6.73 (.265) R 10.5 (.413) U 7.5 (.295) DIMENSIONS: MM (INCHES) Date Code Description 12.07 0.25 (.475 .01) 0.64 0.05 (.025 .002) LOCKWASHER H-37-2 11 +0/-0.43 (.433 +0/-.017) 30 5 TYP. NUT H-38-2 9.58 0.36 (.377 .014) 2.36 0.25 (.093 .01) 3/8-32 NEF-2B 12.52 0.36 (.493 .014) 0.56 0.05 (.022 .002) LOCKWASHER H-37-3 14.66 +0/-0.43 (.577 +0/-.017) 30 5 NUT H-38-8 7.24 0.38 (.285 .015) 10 0.2 (.394 .008) 2 0.2 (.079 .008) M7 x .75 YYWWM M = COUNTRY OF MANUFACTURE (MEXICO) 12.45 0.38 (.490 .015) 0.71 0.18 (.028 .007) 30 15 TYP. WW = WEEK NUMBER YY = LAST TWO DIGITS OF YEAR MANUFACTURED LOCKWASHER H-37-4 NUT H-38-9 10.41 0.38 (.410 .015) 14 0.2 (.551 .008) 2.9 0.2 (.114 .008) M10 x .75 15.11 0.51 (.595 .020) 0.56 0.05 (.022 .002) DIMENSIONS: 30 15 TYP. MM (INCHES) 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. How to Order Model 91, 92, 93, 94 & 95 Panel Controls 91 A D A 2 A - A 91 92 93 94 95 BUSHING Metal Plain 3/8 " (9.53 mm) D x 3/8 " (9.53 mm) L Metal Plain 1/4 " (6.35 mm) D x 1/4 " (6.35 mm) L Metal Plain 10 mm D x 9 mm L Metal Plain 7 mm D x 9 mm L A 16 22 METRIC 16 mmL 22 mmL 15 Plastic Single Slotted 1/4 " (6.35 mm) D Plastic Single Flatted 1/4" (6.35 mm) D Plastic Single Plain 1/8" (3.18 mm) D Plastic Single Slotted 6 mm D Plastic Single Slotted 4 mm D Plastic Single Knurled 1/4" (6.35 mm) D Metal Single Plain 1/4" (6.35 mm) D Metal Single Slotted 1/8" (3.18 mm) D Metal Single Slotted 1/4" (6.35 mm) D Metal Single Flatted 1/4" (6.35 mm) D Metal Single Slotted 6 mm D Metal Single Flatted 6 mm D Metal Single Slotted 4 mm D / A1 5 L Partnumberformultiplesectionpotentiometersmusthave ataperandresistancevalueforeachsection. RoHS IDENTIFIER L Compliant AVAILABLE ONLY IN BUSHING Code A, C A, C A, C A A R, U R, U MODEL Single-Turn, In-Line PC Pins Single-Turn, In-Line J-Hooks Single-Turn, L-Pattern PC Pins Single-Turn, L-Pattern J-Hooks Single-Turn, Triangle-Pattern Solder Lugs SHAFT TYPE B C D R T W A E G H J S V - SHAFT LENGTH (FMS) Code Description 16 1/2 "L 20 5/8 "L 24 3/4 "L 28 7/8 "L 32 1 "L ANTI-ROTATION LUG Single .305 " (7.8 mm) R, 90 CW No Lug # SECTIONS 1 Single 2 Dual A C R U 28 AVAILABLE ONLY IN LENGTHS BUSHINGS (CODE) (CODE) 16, 20, 24, 28 A 24, 28 A 16, 20, 24 C Metric 16, 22 R Metric 16, 22 U 32 A 16, 20, 24 A 16, 20, 24 C 16, 20, 24, 28 A 24, 28 A Metric 16, 22 R Metric 16, 22 R Metric 16, 22 U ELEMENT TAPER TYPE/TOLERANCE (A) Linear Cermet 10 % (H) Linear Cermet 5 % (B) (E) Linear C-P 20 % Linear C-P 10 % (C) (D) (F) (G) (S) (T) CW Audio Cermet 10 % CW Audio C-P 20 % CCW Audio Cermet 10 % CCW Audio C-P 20 % CW Audio C-P 10 % CCW Audio C-P 10 % RESISTANCE CODE VALUE IN OHMS (05) - 100 (30) - 15 K (28) - 150 (16) - 20 K (06) - 200 (17) - 25 K (07) - 250 (18) - 50 K (08) - 500 (20) - 100 K (10) - 1 K (21) - 200 K (11) - 2 K (22) - 250 K (12) - 2.5 K (23) - 500 K (13) - 5 K (25) - 1 M (15) - 10 K (10) - 1 K (18) - 50 K (12) - 2.5 K (20) - 100 K (13) - 5 K (22) - 250 K (15) - 10 K (23) - 500 K (16) - 20 K (25) - 1 M (17) - 25 K (10) - 1 K (18) - 50 K (12) - 2.5 K (20) - 100 K (13) - 5 K (22) - 250 K (15) - 10 K (23) - 500 K (17) - 25 K (25) - 1 M Boldface features are Bourns standard options. All others are available with higher minimum order quantities. Asia-Pacific: Tel: +886-2 2562-4117 * Email: asiacus@bourns.com EMEA: Tel: +36 88 885 877 * Email: eurocus@bourns.com The Americas: Tel: +1-951 781-5500 * Email: americus@bourns.com www.bourns.com REV. 10/20 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. Legal Disclaimer Notice This legal disclaimer applies to purchasers and users of Bourns(R) products manufactured by or on behalf of Bourns, Inc. and P[ZHSPH[LZJVSSLJ[P]LS)V\YUZ Unless otherwise expressly indicated in writing, Bourns(R) products and data sheets relating thereto are subject to change ^P[OV\[UV[PJL<ZLYZZOV\SKJOLJRMVYHUKVI[HPU[OLSH[LZ[YLSL]HU[PUMVYTH[PVUHUK]LYPM[OH[Z\JOPUMVYTH[PVUPZJ\YYLU[ and complete before placing orders for Bourns(R) products. The characteristics and parameters of a Bourns(R) product set forth in its data sheet are based on laboratory conditions, and statements regarding the suitability of products for certain types of applications are based on Bourns' knowledge of typical requirements in generic applications. 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Users shall not sell, transfer, export or re-export any Bourns(R)WYVK\J[ZVY[LJOUVSVNMVY\ZLPUHJ[P]P[PLZ^OPJOPU]VS]L[OL KLZPNUKL]LSVWTLU[WYVK\J[PVU\ZLVYZ[VJRWPSPUNVMU\JSLHYJOLTPJHSVYIPVSVNPJHS^LHWVUZVYTPZZPSLZUVYZOHSS[OL\ZL Bourns(R)WYVK\J[ZVY[LJOUVSVNPUHUMHJPSP[^OPJOLUNHNLZPUHJ[P]P[PLZYLSH[PUN[VZ\JOKL]PJLZ;OLMVYLNVPUNYLZ[YPJ[PVUZ HWWS[VHSS\ZLZHUKHWWSPJH[PVUZ[OH[]PVSH[LUH[PVUHSVYPU[LYUH[PVUHSWYVOPIP[PVUZPUJS\KPUNLTIHYNVZVYPU[LYUH[PVUHS YLN\SH[PVUZ-\Y[OLY)V\YUZ(R) products and Bourns technology and technical data may not under any circumstance be exported or re-exported to countries subject to international sanctions or embargoes. Bourns(R) products may not, without WYPVYH\[OVYPa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bilingual versions are available at: Web Page: http://www.bourns.com/legal/disclaimers-terms-and-policies PDF: http://www.bourns.com/docs/Legal/disclaimer.pdf *9