Features n RoHS compliant* n Conductive plastic or cermet n Linear and audio tapers n PC board and bushing mount n Gangable n Metal bushing and shaft n Sealed for board washing 51/53 Sealed 1/2 (12.5 mm) Square Control 1 Electrical Characteristics 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 1 Environmental Characteristics 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 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 flux. Part can be wave soldered at 260 C (500 F) for 5 seconds, no wash process with no clean flux. Marking ............................................................................................................................................................... Manufacturers trademark, part number and date code Ganging (Multiple Section Potentiometer) .............................................................................................................................................................2 sections 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 Bushing S: H-37-1 & H-38-14 Bushing U: H-37-3 & H-38-8) 1 Electrical specifications tested at 200 RPM, at room ambient: +25 C nominal. ** Additional sections available on special request with higher minimum order quantities. *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. 51/53 Sealed 1/2 (12.5 mm) Square Control Product Dimensions PACKAGE DIMENSIONS FMS 7.62 (.300) 5.08 MODEL 51 16.51 0.25 6.35 (.200) (.650 .010) (.250) 1.32 8.89 0.18 12.5 (.052) (.350 .007) (.492) 6.25 .64 11.00 TYP. DIA. ( .025) (.246) 2.54 (.432) (.100) 7.00 C OF POT (.275) L 0.74 (.029) 1.27 1.02 0.30 (.050) (.040) DIA. (.0118) 6.60 0.38 .66 .05 DIA. 3 X 4 PLCS. (.260 .015) 7.62 0.30 (.026 .002) 5.08 0.30 6 PLCS. 2.54 (.300 .012) (.200 .012) (.100) (DOUBLE MODULE FRONT AND REAR BRACKET SHOWN) 2.54 (.100) (SINGLE AND DUAL MODULE SHOWN) 2.54 TERMINAL SPACING (.100) PACKAGE DIMENSIONS PCB MOUNTING BRACKET SOLDER LUG TERMINALS MODEL 53 12.5 (.492) .64 6.25 ( .025) 11.00 DIA. (.246) (.432) 32 1 5.0 0.51 7.00 2.40 (.197 .020) (.275) (.094) 0.74 (.029) 0.90 1.80 1.32 0.25 (.036) (.071) (.052 .010) 6.60 0.38 0.91 .051 .41 .05 2 X (.260 .015) 4.70 ( .016 .002) (.036 .002) 2 X 5.08 0.30 (.185) 5.08 (.200 .012) 5.08 (.200) 6.35 .25 7.62 0.30 (.200) (.250 .010) (.300 .012) ELECTRICAL SCHEMATIC 2.54 2 X (.100) CW CCW 3 1 2 ANTI-ROTATION LUG SHAFT FLAT SUGGESTED PANEL LAYOUT (Style Shown) 5.70 ORIENTATION 0.41 (.224) 5.69 0.80 0.30 (.016) (.224) (.031 .012) 1.52 (.060) 2.21 DIA. 132 5 (.087) CCW END BUSHING DIAMETER +0.79 (+.031) .25 FOR TOLERANCES SHOWN: .XX = (.010) .13 .XXX = (.005) .80 MM SHAFT DIMENSIONS (1/32) DIMENSIONS: (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.