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 %
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
Mounting (Torque on Bushing).......................................................................................................................................... 1.7 to 2.0 N-m (15 to 18 lb.-in.) maximum
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
Hardware .............................................................................One lockwasher and one mounting nut is shipped with each potentiometer (Bushing A: H-37-2 & H-38-2;
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
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.
51/53 – Sealed 1/2 ˝ (12.5 mm) Square Control
Product Dimensions
PACKAGE DIMENSIONS
16.51 ± 0.25
(.650 ± .010)
MODEL 51
8.89 ± 0.18
(.350 ± .007)
.64
"L"
( .025)
12.5
(.492)
11.00
DIA.
(.432)
0.74
(.029)
0.30
(.0118)
6.25
(.246)
7.00
(.275)
7.62
(.300)
6.35
(.250)
TYP.
2.54
(.100)
FMS
5.08
(.200)
1.32
(.052)
C OF POT
L
7.62 ± 0.30
(.300 ± .012)
5.08 ± 0.30
(.200 ± .012)
3X
.66 ± .05
(.026 ± .002)
(SINGLE AND DUAL MODULE SHOWN)
2.54
(.100) TERMINAL SPACING
6.60 ±0.38
(.260 ± .015)
2.54
(.100)
2.54
(.100)
1.27
(.050)
DIA.
4 PLCS.
1.02
(.040)
DIA.
6 PLCS.
(DOUBLE MODULE FRONT AND REAR BRACKET SHOWN)
PACKAGE DIMENSIONS PCB MOUNTING BRACKET
12.5
(.492)
11.00
DIA.
(.432)
0.74
(.029)
1.32 ± 0.25
(.052 ± .010)
5.08 ± 0.30
(.200 ± .012)
7.62 ± 0.30
(.300 ± .012)
2X
2X
SOLDER LUG TERMINALS
MODEL 53
6.25
(.246)
7.00
(.275)
2.40
(.094)
.64
"L"
( .025)
3
2
1
5.0 ± 0.51
(.197 ± .020)
0.91 ± .051
(.036 ± .002)
6.35 ± .25
(.250 ± .010)
.41 ± .05
( .016 ± .002)
5.08
(.200)
2.54
(.100)
6.60 ±0.38
(.260 ± .015)
5.08
(.200)
0.90
(.036)
2X
1.80
(.071)
4.70
(.185)
ELECTRICAL SCHEMATIC
CCW
1
2
3
CW
ANTI-ROTATION LUG
(Style "A" Shown)
0.80 ± 0.30
(.031 ± .012)
0.41
(.016)
1.52
(.060)
5.70
(.224)
SHAFT FLAT
ORIENTATION
SUGGESTED PANEL LAYOUT
5.69
(.224)
2.21
DIA.
(.087)
BUSHING DIAMETER
+0.79
(+.031)
132 ° ± 5 °
CCW END
.25
FOR TOLERANCES SHOWN: .XX = ± (.010)
DIMENSIONS:
MM
(INCHES)
.XXX = ±
.13
(.005)
SHAFT DIMENSIONS ±
.80
(1/32)
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.
51/53 – Sealed 1/2 ˝ (12.5 mm) Square Control
Hardware
LOCKWASHER H-37-1
6.6
(.26)
NUT H-38-1
9.53 +0/-0.38
(.375 +0/-.015)
2.36 ± 0.25
(.093 ± .01)
Date Code Description
YYWWM
M = COUNTRY OF MANUFACTURE
(MEXICO)
WW = WEEK NUMBER
YY = LAST TWO DIGITS OF YEAR
MANUFACTURED
1/4-32 UNEF
12.07 ± 0.25
(.475 ± .01)
LOCKWASHER H-37-2
9.58 ± 0.36
(.377 ± .014)
0.64 ± 0.05
(.025 ± .002)
NUT H-38-2
11 +0/-0.43
(.433 +0/-.017)
30 ° ± 5 °
TYP.
2.36 ± 0.25
(.093 ± .01)
3/8-32 NEF-2B
12.52 ± 0.36
(.493 ± .014)
LOCKWASHER H-37-3
7.24 ± 0.38
(.285 ± .015)
0.56 ± 0.05
(.022 ± .002)
NUT H-38-8
10 ± 0.2
(.394 ± .008)
14.66 +0/-0.43
(.577 +0/-.017)
30 ° ± 5 °
2 ± 0.2
(.079 ± .008)
M7 x .75
12.45 ± 0.38
(.490 ± .015)
LOCKWASHER H-37-4
10.41 ± 0.38
(.410 ± .015)
0.71 ± 0.18
(.028 ± .007)
NUT H-38-9
14 ± 0.2
(.551 ± .008)
30 ° ± 15 °
TYP.
2.9 ± 0.2
(.114 ± .008)
M10 x .75
15.11 ± 0.51
(.595 ± .020)
0.56 ± 0.05
(.022 ± .002)
NUT H-38-14
8 ± 0.2
(.315 ± .008)
30 ° ± 15 °
TYP.
2 ± 0.2
(.079 ± .008)
M6 x .75
30 ° ± 15 °
TYP.
Asia-Pacific:
Tel: +886-2 2562-4117 • Email: asiacus@bourns.com
EMEA:
Tel: +36 88 885 877 • Email: eurocus@bourns.com
The Americas:
Tel: +1-951 781-5500 • Email: americus@bourns.com
www.bourns.com
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.
51/53 – Sealed 1/2 ˝ (12.5 mm) Square Control
Shaft/Bushing Styles
9.53
(.375)
1.60 ± 0.25
OPT.
(.063 ± .010)
1.194 ± 0.10
OPT.
(.047 ± .004)
How To Order
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
-
A
15
/
A15
L
3/8-32UNEF-2A
6.35
9.53
SHAFT
BUSHING
(.250)
(.375)
6.35
(.250)
Part number for multiple
section potentiometers
must have a taper
and resistance value
for each section.
RoHS IDENTIFIER
L
Compliant
ELEMENT TAPER
TYPE/TOLERANCE
Code Description
(A)
Linear Cermet ±10 %
(H)
Linear Cermet ±5 %
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
0.79 ± 0.25
OPT.
(.031 ± .010)
1/4-32UNEF-2A
3.18
6.35
SHAFT
BUSHING
(.125)
(.250)
9.53
(.375)
0.79 ± 0.10
OPT.
(.031 ± .004)
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)
MAX. FLAT LENGTH
1.52 ± 0.25
OPT.
(.060 ± .010)
15.88
(.625)
3/8-32UNEF-2A
6.35
9.53
SHAFT
BUSHING
(.250)
(.375)
5.49 ± 0.10
OPT.
(.216 ± .005)
A Style Bushing -
Flatted Shaft
STD. LENGTH ‘L’
.625 (15.88)
.750 (19.05)
.875 (22.23)
1.000 (25.4)
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
(B)
(E)
Linear C-P ±20 %
Linear C-P ±10 %
(C)
(F)
8.0
(.315)
1.52 ± 0.25
(.060 ± .010)
0.79 ± 0.10
(.031 ± .004)
S Style Bushing
STD. LENGTH ‘L’
.630 (16.0)
.866 (22.0)
.984 (25.0)
CW Audio Cermet
±10 %
CCW Audio Cermet
±10 %
CW Audio C-P ±20 %
CW Audio C-P ±10 %
M6 X .075-6g
3.0
6.0
SHAFT
BUSHING
(.118)
(2.36)
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
(D)
(S)
(G)
(T)
(Y)
CCW Audio C-P
±20 %
CCW Audio C-P
±10 %
CW Dual Audio
Taper C-P ±20 %
8.0
(.315)
1.52 ± 0.25
(.060 ± .010)
U Style Bushing
STD. LENGTH ‘L’
.630 (16.0)
.866 (22.0)
.984 (25.0)
M7 X .075-6g
4.0
7.0
SHAFT
BUSHING
(.157)
(2.75)
0.79 ± 0.10
(.031 ± .004)
9.5
(.374)
1.80 ± 0.25
(.071 ± .010)
R Style Bushing
STD. LENGTH ‘L’
.630 (16.0)
.866 (22.0)
.984 (25.0)
1.00 ± 0.10
(.039 ± .004)
M10 X 0.75-6g
6.0
10.0
SHAFT
BUSHING
(.236)
(.394)
Code
B
C
E
R
T
U
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 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
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
DIMENSIONS:
MM
(INCHES)
Boldface features are Bourns standard options. All others are available with higher
minimum order quantities.
REV. 10/20
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.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns
®
products manufactured by or on behalf of Bourns, Inc. and
Unless otherwise expressly indicated in writing, Bourns
®
products and data sheets relating thereto are subject to change
and complete before placing orders for Bourns
®
products.
The characteristics and parameters of a Bourns
®
product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns
®
®
product with other components
the actual performance of the Bourns
®
®
®
product as meeting the requirements of a particular industry
®
of Bourns products are responsible for ensuring compliance with safety-related requirements and standards applicable to
®
Bourns
®
on a case-by-case basis, use of any Bourns
®
®
®
®
®
Bourns
®
®
standard products that are suitable for use in aircraft
®
standard
the user’s sole risk.
®
and the user for which such Bourns
®
®
custom products shall be negotiated on a case-by-case basis by Bourns
®
also apply to such Bourns custom products.
Users shall not sell, transfer, export or re-export any Bourns
®
Bourns
®
standard products shall
products and Bourns technology and technical data may not under any circumstance be
exported or re-exported to countries subject to international sanctions or embargoes. Bourns
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