PL IA NT CO M *R oH S Features ■ RoHS compliant* ■ Conductive plastic or cermet ■ 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 Effective 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 infinite .................................. Essentially infinite 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 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 % 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 .....................................................................................................IP 64 ...................................................... IP 64 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.) 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 flux. Part can be wave soldered at 260 °C (500 °F) for 5 seconds, no wash process with no clean flux. 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. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. 51/53 - Sealed 1/2 ” (12.5 mm) Square Control Product Dimensions PACKAGE DIMENSIONS 16.51 ± 0.25 (.650 ± .010) FMS 7.62 (.300) MODEL 51 5.08 (.200) 6.35 (.250) 8.89 ± 0.18 (.350 ± .007) .64 "L" ( .025) 12.5 (.492) 6.25 (.246) 11.00 DIA. (.432) 7.00 (.275) 1.32 (.052) TYP. 2.54 (.100) CL OF POT 0.74 (.029) 0.30 (.0118) 7.62 ± 0.30 (.300 ± .012) 6.60 ±0.38 (.260 ± .015) 2.54 (.100) 2.54 (.100) .66 ± .05 3X (.026 ± .002) 5.08 ± 0.30 (.200 ± .012) (SINGLE AND DUAL MODULE SHOWN) 12.5 (.492) .64 ( .025) 6.25 (.246) 11.00 DIA. (.432) 7.00 (.275) 3 2.40 (.094) 2 1 5.0 ± 0.51 (.197 ± .020) 0.90 (.036) 1.32 ± 0.25 (.052 ± .010) 2X 5.08 ± 0.30 (.200 ± .012) 2X 5.08 (.200) 5.08 (.200) 2X 1.80 (.071) 6.60 ±0.38 (.260 ± .015) .41 ± .05 ( .016 ± .002) 7.62 ± 0.30 (.300 ± .012) 6.35 ± .25 (.250 ± .010) (DOUBLE MODULE FRONT AND REAR BRACKET SHOWN) SOLDER LUG TERMINALS MODEL 53 0.74 (.029) 0.91 ± .051 (.036 ± .002) 1.02 (.040) DIA. 6 PLCS. 2.54 (.100) TERMINAL SPACING PACKAGE DIMENSIONS PCB MOUNTING BRACKET "L" 1.27 (.050) DIA. 4 PLCS. 4.70 (.185) ELECTRICAL SCHEMATIC 2.54 (.100) CCW 3 1 CW 2 ANTI-ROTATION LUG (Style "A", 90 CW Shown) SHAFT FLAT ORIENTATION 0.80 ± 0.30 (.031 ± .012) 0.41 (.016) SUGGESTED PANEL LAYOUTS The Model 50 can be used with either of the two panel layouts shown below. 5.70 (.224) 6.20 (.244) 1.52 (.060) 6.35 (.250) 132 ° ± 5 ° CCW END 2.20 (.087) BUSHING DIAMETER TOLERANCE +0.80 ( +.031) DIMENSIONS: MM (INCHES) 2.77 (.109) BUSHING DIAMETER TOLERANCE +0.80 ( +.031) .25 FOR TOLERANCES SHOWN: .XX = ± (.010) .XXX = ± .13 (.005) SHAFT DIMENSIONS ± .80 (1/32) Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. 51/53 - Sealed 1/2 ” (12.5 mm) Square Control Shaft/Bushing Styles 9.53 (.375) 3/8-32UNEF-2A How To Order 1.60 ± 0.25 OPT. (.063 ± .010) 1.194 ± 0.10 OPT. (.047 ± .004) A Style Bushing STD. LENGTH ‘L’ .500 (12.7) .625 (15.88) .750 (19.05) .875 (22.23) 1.000 (25.4) 51 A A D - B 28 - 6.35 9.53 SHAFT BUSHING (.250) (.375) 6.35 (.250) 0.79 ± 0.25 OPT. (.031 ± .010) 1/4-32UNEF-2A 0.79 ± 0.10 OPT. (.031 ± .004) 3.18 6.35 SHAFT BUSHING (.125) (.250) 9.53 (.375) MAX. FLAT LENGTH 1.52 ± 0.25 OPT. (.060 ± .010) 3/8-32UNEF-2A 6.35 9.53 SHAFT BUSHING (.250) (.375) .315 (8.0) M6 X .075-6g 15.88 (.625) 5.49 ± 0.10 OPT. (.216 ± .005) 1.52 ± 0.25 (.060 ± .010) 0.79 ± 0.10 (.031 ± .004) S Style Bushing STD. LENGTH ‘L’ .394 (10.0) .512 (13.0) .630 (16.0) .866 (22.0) .984 (25.0) 3.0 6.0 SHAFT BUSHING (.118) (2.36) 8.0 (.315) 1.52 ± 0.25 (.060 ± .010) 0.79 ± 0.10 (.031 ± .004) M7 X .075-6g 4.0 7.0 SHAFT BUSHING (.157) (2.75) 9.5 (.374) 1.80 ± 0.25 (.071 ± .010) 1.00 ± 0.10 (.039 ± .004) M10 X 0.75-6g 6.0 10.0 SHAFT BUSHING (.236) (.394) DIMENSIONS: MM (INCHES) U Style Bushing STD. LENGTH ‘L’ .394 (10.0) .512 (13.0) .630 (16.0) .866 (22.0) .984 (25.0) R Style Bushing STD. LENGTH ‘L’ .512 (13.0) .630 (16.0) .866 (22.0) .984 (25.0) 15 L RoHS IDENTIFIER Code Description L Compliant C Style Bushing STD. LENGTH ‘L’ .375 (9.53) .500 (12.7) .625 (15.88) .750 (19.05) .875 (22.23) 1.000 (25.4) A Style Bushing Flatted Shaft STD. LENGTH ‘L’ .625 (15.88) .750 (19.05) .875 (22.23) 1.000 (25.4) A MOUNTING BRACKET/ ANTI-ROTATION LUG Code Description AR Lug 90 °CW A No AR Lug or Bracket D Front Bracket L Rear Bracket M Front and Rear Bracket N # SECTIONS/DETENTS Code Description Single No Detent A Double No Detent B Single w/Center Detent E Double w/Center Detent F ELEMENT TAPER TYPE/TOLERANCE Code Description (A) Linear Cermet ±10 % (H) Linear Cermet ±5 % (B) (E) Linear C-P ±20 % Linear C-P ±10 % (C) CW Audio Cermet ±10 % CCW Audio Cermet ±10 % (F) BUSHING CONFIGURATION Code Description 3/8 ” D x 3/8 ” L A 1/4 ” D x 1/4 ” L C 10 mm D x 9.5 mm L R 6 mm D x 8 mm L S 7 mm D x 8 mm L U MODEL Code Description 51 PC Pins (.100 ” centers) 53 Solder Lugs Code B C D E R T U (D) (S) CW Audio C-P ±20 % CW Audio C-P ±10 % (G) CCW Audio C-P ±20 % CCW Audio C-P ±10 % (T) (Y) CW Dual Audio Taper C-P ±20 % AVAILABLE ONLY IN SHAFT TYPE BUSHINGS LENGTHS Description Code Description Single Slotted 1/4 ”D A 24,28 Single Flatted 1/4 ”D A 20,24,28,32 Single Plain 1/8 ”D C 16,20,24,28 Single Slotted 1/8 ”D C 12,16,20,24,28 Single Slotted 6 mmD R 16,22,25 Single Slotted 4 mmD U 16,22,25 Single Slotted 3 mmD S 16,22,25 RESISTANCE (CODE) VALUE IN OHMS (28) — 150 (14) — 7.5 K (06) — 200 (15) — 10 K (07) — 250 (30) — 15 K (08) — 500 (16) — 20 K (09) — 750 (17) — 25 K (10) — 1 K (18) — 50 K (29) — 1.5 K (19) — 75 K (11) — 2 K (20) — 100 K (12) — 2.5 K (23) — 500 K (13) — 5 K (25) — 1 M (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 (23) — 500 K (15) — 10 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 (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 (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 SHAFT LENGTH (FMS) Code Description 12 3/8 ” 16 1/2 ” 20 5/8 ” 24 3/4 ” 28 7/8 ” 32 1” Metric 16 16 mm 22 22 mm 25 25 mm AVAILABLE ONLY IN BUSHING Code C A, C A, C A, C A, C A, C R, S, U R, S, U R, S, U Boldface features are Bourns standard options. All others are available with higher minimum order quantities. REV. 09/11 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.