Features NT MPLIA ■ RoHS compliant* O HS C ■ Conductive plastic or cermet *Ro ■ Linear and audio tapers ■ PC board and bushing mount ■ Gangable ■ Metal bushing and shaft ■ Sealed for board washing 51/53 - Sealed 1/2 ” (12.5 mm) Square Control Electrical Characteristics1 Conductive Plastic Cermet Standard Resistance Range Linear ...................................................................................................1 K ohms to 1 megohm .........................150 ohms to 1 megohm Audio ....................................................................................................1 K ohms to 1 megohm .........................1 K ohms to 1 megohm Total Resistance Tolerance Linear Tapers ........................................................................................±10 % or ±20 % ....................................±10 % or ±5 % Audio Tapers ........................................................................................±10 % or ±20 % ....................................±10 % Independent Linearity .................................................................................±5 % ......................................................±5 % Absolute Minimum Resistance ...................................................................2 ohms maximum ..................................2 ohms maximum Eff ective Electrical Angle ............................................................................270 ° ±5 ° ..............................................270 ° ±5 ° Contact Resistance Variation .....................................................................2 % ........................................................2 % Dielectric Withstanding Voltage (MIL-STD-202 – Method 301) Sea Level ..............................................................................................1,500 VAC minimum ..............................1,500 VAC minimum 70,000 ..................................................................................................500 VAC minimum .................................500 VAC minimum Insulation Resistance .................................................................................1,000 megohms minimum .....................1,000 megohms minimum Power Rating At 70 °C (Derate To 0 At 125 °C) (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less) Linear Tapers ........................................................................................0.5 watt ..................................................1.0 watt Audio Tapers ........................................................................................0.25 watt ................................................0.5 watt Theoretical Resolution ................................................................................Essentially infi nite ..................................Essentially infi nite Environmental Characteristics1 Operating Temperature Range ...................................................................+1 °C to +125 °C ...................................+1 °C to +125 °C Storage Temperature Range ......................................................................-55 °C to +125 °C ..................................-55 °C to +125 °C Temperature Coeffi 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 % TRS maximum ...........................±5 % TRS maximum Rotational Life (No Load) ............................................................................50,000 cycles ........................................25,000 cycles Total Resistance Shift ...........................................................................±10 % TRS maximum ...........................±10 % TRS maximum Contact Resistance Variation @ 25,000 Cycles ...................................±2 % ......................................................±4 % Moisture Resistance (MIL-STD-202, Method 103, Condition B) Total Resistance Shift ...........................................................................±10 % TRS ............................................±5 % TRS IP Rating Entire Unit .............................................................................................IP64 .......................................................IP64 Shaft/Bushing.......................................................................................IP65 .......................................................IP65 Mechanical Characteristics Stop Strength ...............................................................................................................................................................................................56 N-cm (5 lb.-in.) Mechanical Angle ......................................................................................................................................................................................................290 ° ±5 ° Torque Starting (Dual Sections) ..............................................................................................................................................+0.35 N-cm (+0.5 oz.-in.) maximum Running (Single Section) .............................................................................................................................................0.15 to 1.4 N-cm (0.2 to 2.0 oz.-in.) Running (Dual Section) ................................................................................................................................................0.35 to 1.8 N-cm (0.5 to 2.5 oz.-in.) Detent (Single Section) ...................................................................................................................................................1.94 N-cm (2.75 oz.-in.) minimum Mounting (Torque on Bushing) ..........................................................................................................................1.7 to 2.0 N-m (15 to 18 lb.-in.) maximum Weight (Single Section)..............................................................................................................................................................................................5.5 grams (Additional Section) .............................................................................................................................................................................................3.0 grams Terminals ...................................................................................................................................................................................................PC pin or solder lug 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 fl ux. Part can be wave soldered at 260 °C (500 °F) for 5 seconds, no wash process with no clean fl ux. Marking ..................................................................................................................Manufacturer’s trademark, part number, resistance value and date code. Ganging (Multiple Section Potentiometer) ............................................................................................................................................2 sections maximum** Hardware ...........................................One lockwasher and one mounting nut is shipped with each potentiometer, except where noted in the part number. 1At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted. ** Additional sections available on special request with higher minimum order quantities. *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifi 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 specifi c applications.

51/53 - Sealed 1/2 ” (12.5 mm) Square Control Product Dimensions PACKAGE DIMENSIONS 7.62 FMS MODEL 51 (.300) 5.08 16.51 ± 0.25 6.35 (.200) (.650 ± .010) 8.89 ± 0.18 (.250) 1.32 (.350 ± .007) 12.5 (.052) (.492) "L"( ..06245) (1.413.020) DIA. (6.2.2456) T2Y.5P4. 7.00 (.100) (.275) CLOF POT 0.74 (.029) 1.27 0.30 (.050) 1.02 7.62 ± 0.30 (.50.10188 ±) 0.30 3 X (. 0.6266 ±± ..00502) (.62.6600 ±± 0.0.3185) 4 DPILAC.S. 6(. 0DP4ILA0C.)S. (.300 ± .012) (.200 ± .012) 2.54 (.100) (DOUBLE MODULE FRONT AND REAR BRACKET SHOWN) 2.54 (.100) (SINGLE AND DUAL MODULE SHOWN) 2.54 (.100) TERMINAL SPACING PACKAGE DIMENSIONS PCB MOUNTING BRACKET SOLDER LUG TERMINALS MODEL 53 12.5 .64 (.492) "L"( .025) 11.00 6.25 (.432) DIA. (.246) 7.00 2.40 3 2 1 5.0 ± 0.51 (.275) (.094) (.197 ± .020) 0.74 (.029) 1.32 ± 0.25 0.90 1.80 (.052 ± .010) (.036) (.071) (0.0.9316 ±± ..005012) (5.2.0080 ±± 0.0.3102) 2 X( .0.4116 ±± ..500.50028) (5.2.00(.8062).6600 ±± 0.0.3185) 2 X(4.1.7805) 6.35 ± .25 7.62 ± 0.30 (.200) (.250 ± .010) (.300 ± .012) ELECTRICAL SCHEMATIC 2.54 2 X (.100) CCW 1 3 CW 2 ANTI-ROTATION LUG SHAFT FLAT SUGGESTED PANEL LAYOUT (Style "A" Shown) 5.70 ORIENTATION 0.41 (.224) 6.20 0.80 ± 0.30 (.016) (.244) (.031 ± .012) 1.52 (.060) 132 ° ± 5 ° (2.0.2869)DIA. CCW END BUSHING DIAMETER TOLERANCE +0.25 ( +.010) .25 FOR TOLERANCES SHOWN: .XX = ± (.010) .XXX = ± .13 (.005) SHAFT DIMENSIONS ± .80 (1/32) MM DIMENSIONS: (INCHES) Specifi 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 specifi c applications.

51/53 - Sealed 1/2 ” (12.5 mm) Square Control Shaft/Bushing Styles How To Order 9.53 A Style Bushing (.375) 1.60 ± 0.25 STD. LENGTH ‘L’ 51 A A D - B 28 - A 15 / A15 L (.063 ± .010) OPT. .500 (12.7) .625 (15.88) Part number for multiple .750 (19.05) section potentiometers 1.194 ± 0.10 .875 (22.23) must have a taper (.047 ± .004) OPT. 1.000 (25.4) and resistance value 3/8-32UNEF-2A for each section. 6.35 9.53 SHAFT BUSHING (.250) (.375) RoHS IDENTIFIER L Compliant 6.35 C Style Bushing (.250) 0.79 ± 0.25 OPT. STD. LENGTH ‘L’ (.031 ± .010) .375 (9.53) ELEMENT TAPER RESISTANCE TYPE/TOLERANCE (CODE) .500 (12.7) Code Description VALUE IN OHMS .625 (15.88) MOUNTING BRACKET/ 1/4-32UNEF-2A (0.0.3791 ±± .00.0140 ) OPT. ..785705 ((1292..0253)) CodAeNDTIe-RscOrTipAtTioIOnN LUG ((AH )) L Liinneeaarr CCeerrmmeet t± ±51 %0 % (((200876))) ——— 122550000 (((131405))) ——— 711.505 KKK 3.18 SHAFT 6.35 BUSHING 1.000 (25.4) A AR Lug 90 °CW (08) — 500 (16) — 20 K (.125) (.250) D No AR Lug or Bracket (09) — 750 (17) — 25 K L Front Bracket (10) — 1 K (18) — 50 K (9.3.5735) 1M.5A2X .± F 0L.A2T5 LEONPGTT. H 1(.652.858) A SFtlaytlete Bdu Sshhainftg - MN RFreoanrt Barnadc kReetar Bracket (((211912))) ——— 122. .5K5 KK (((122930))) ——— 751500 00K KK (.060 ± .010) STD. LENGTH ‘L’ (13) — 5 K (25) — 1 M .625 (15.88) (B) Linear C-P ±20 % (10) — 1 K (18) — 50 K .750 (19.05) # SECTIONS/DETENTS (E) Linear C-P ±10 % (12) — 2.5 K (20) — 100 K .875 (22.23) Code Description (13) — 5 K (22) — 250 K 3/8-32UNEF-2A (.52.1469 ±± .00.0150) OPT. 1.000 (25.4) AB SDionugbllee NNoo DDeetteenntt ((1165)) —— 2100 KK ((2235)) —— 510 M0 K (.62.3505) SHAFT (.93.7535 ) BUSHING EF SDionugblele w w/C/Ceennteter rD Deetetenntt (C ) C±1W0 A%u dio Cermet (((111720))) ——— 2215 .5K K K ((1208)) —— 15000 K K (F) CCW Audio Cermet (13) — 5 K (23) — 500 K ±10 % (15) — 10 K (25) — 1 M (.381.05) (.10.6502 ±± .00.1205) S S.S6T3tDy0. l LeE NBG(u1Ts6Hh. 0‘iL)n’g CBoUdSeHIDNeGs cCrOipNtiFoInGURATION ((DS )) CCWW AAuuddiioo CC--PP ±±1200 %% (((111720))) ——— 2215. 5K K K ((2108)) —— 15000 K K .866 (22.0) A 3/8 ” D x 3/8 ” L (13) — 5 K (22) — 250 K 0.79 ± 0.10 .984 (25.0) C 1/4 ” D x 1/4 ” L (15) — 10 K (23) — 500 K (.031 ± .004) R 10 mm D x 9.5 mm L (17) — 25 K (25) — 1 M M6 X .075-6g S 6 mm D x 8 mm L (G) CCW Audio C-P (10) — 1 K (18) — 50 K 3.0 SHAFT 6.0 BUSHING U 7 mm D x 8 mm L ±20 % (12) — 2.5 K (20) — 100 K (.118) (2.36) (T) CCW Audio C-P (13) — 5 K (22) — 250 K ±10 % (15) — 10 K (23) — 500 K (17) — 25 K (25) — 1 M MODEL (Y) CW Dual Audio (10) — 1 K (18) — 50 K 8.0 1.52 ± 0.25 U Style Bushing Code Description Taper C-P ±20 % (12) — 2.5 K (20) — 100 K (.315) (.060 ± .010) STD. LENGTH ‘L’ 51 PC Pins (.100 ” centers) (13) — 5 K (22) — 250 K .630 (16.0) 53 Solder Lugs (15) — 10 K (23) — 500 K .866 (22.0) (17) — 25 K (25) — 1 M 0.79 ± 0.10 .984 (25.0) (.031 ± .004) M7 X .075-6g 4.0 7.0 (.157)SHAFT (2.75)BUSHING AVAILABLE ONLY IN SHAFT AVAILABLE SHAFT TYPE BUSHINGS LENGTHS LENGTH ONLY IN Code Description Code Description (FMS) BUSHING (.397.54) (.10.7810 ±± .00.2105) RS .S6T3tDy0. lLeE NBG(u1Ts6H.h 0‘iL)n’g BCE SSSiiinnngggllleee FSSlalloottttetteeddd 1 11/4//48 ” D””DD ACA 122,01,622,442,,022,882,43,228 C112o260d e D315///e828s ”””c ription CAAoC,, dCCe .866 (22.0) R Single Slotted 6 mmD R 16,22,25 24 3/4 ” A, C .984 (25.0) T Single Slotted 4 mmD U 16,22,25 28 7/8 ” A, C 1.00 ± 0.10 U Single Slotted 3 mmD S 16,22,25 32 1 ” A, C (.039 ± .004) Metric M10 X 0.75-6g 16 16 mm R, S, U 6.0 10.0 22 22 mm R, S, U (.236)SHAFT (.394) BUSHING 25 25 mm R, S, U Boldface features are Bourns standard options. All others are available with higher MM DIMENSIONS: minimum order quantities. (INCHES) REV. 12/14 Specifi 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 specifi c applications.