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
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
Electrical Characteristics
1
Conductive Plastic
Cermet
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
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)
1Electrical specifications tested at 200 RPM, at room ambient: +25 °C nominal.
** Additional sections available on special request with higher minimum order quantities.
Environmental Characteristics
1
Mechanical Characteristics
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
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