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
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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
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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.