Features
nꢀ RoHSꢀcompliant*
nꢀ Conductiveꢀplasticꢀorꢀcermet
nꢀ Linearꢀandꢀaudioꢀtapers
nꢀ PCꢀboardꢀandꢀbushingꢀmount
nꢀ Gangable
nꢀ Metalꢀbushingꢀandꢀshaft
nꢀ Sealedꢀforꢀboardꢀwashing
51/53 – Sealed 1/2 ˝ (12.5 mm) Square Control
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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............................................................................................................................................................... Manufacturer’s 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.
*RoHSꢀDirectiveꢀ2015/863,ꢀMarꢀ31,ꢀ2015ꢀandꢀAnnex.
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Specificationsꢀareꢀsubjectꢀtoꢀchangeꢀwithoutꢀnotice.ꢀUsersꢀshouldꢀverifyꢀactualꢀdeviceꢀperformanceꢀinꢀtheirꢀspecificꢀ
applications.ꢀTheꢀproductsꢀdescribedꢀhereinꢀandꢀthisꢀdocumentꢀareꢀsubjectꢀtoꢀspecificꢀlegalꢀdisclaimersꢀasꢀsetꢀforthꢀonꢀtheꢀ
lastꢀpageꢀofꢀthisꢀdocument,ꢀandꢀatꢀwww.bourns.com/docs/legal/disclaimer.pdf.
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