50

PL
IA
N
T
Features
M
■ RoHS compliant*
*R
oH
S
CO
■ Conductive plastic or cermet
■ Linear and audio tapers
■ PC board and bushing mount
■ Gangable
■ Metal bushing and shaft
■ Sealed for board washing
51/53 - Sealed 1/2 ” (12.5 mm) Square Control
Electrical Characteristics1
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
Environmental Characteristics1
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, resistance value and date code.
Ganging (Multiple Section Potentiometer) ............................................................................................................................................ 2 sections maximum**
Hardware ...........................................One lockwasher and one mounting nut is shipped with each potentiometer, except where noted in the part number.
1At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
** Additional sections available on special request with higher minimum order quantities.
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
51/53 - Sealed 1/2 ” (12.5 mm) Square Control
Product Dimensions
PACKAGE DIMENSIONS
FMS
7.62
(.300)
MODEL 51
16.51 ± 0.25
(.650 ± .010)
5.08
(.200)
6.35
(.250)
8.89 ± 0.18
(.350 ± .007)
.64
"L"
( .025)
12.5
(.492)
6.25
(.246)
11.00
DIA.
(.432)
7.00
(.275)
1.32
(.052)
TYP.
2.54
(.100)
CL OF POT
0.74
(.029)
0.30
(.0118)
7.62 ± 0.30
(.300 ± .012)
3X
5.08 ± 0.30
(.200 ± .012)
6.60 ±0.38
(.260 ± .015)
2.54
(.100)
2.54
(.100)
.66 ± .05
(.026 ± .002)
(SINGLE AND DUAL MODULE SHOWN)
12.5
(.492)
.64
( .025)
11.00
DIA.
(.432)
6.25
(.246)
7.00
(.275)
3
2.40
(.094)
2
1
5.0 ± 0.51
(.197 ± .020)
0.90
(.036)
1.32 ± 0.25
(.052 ± .010)
.41 ± .05
2X
( .016 ± .002)
5.08 ± 0.30
(.200 ± .012)
5.08
(.200)
7.62 ± 0.30
(.300 ± .012)
6.35 ± .25
(.250 ± .010)
(DOUBLE MODULE FRONT AND REAR BRACKET SHOWN)
SOLDER LUG TERMINALS
MODEL 53
0.74
(.029)
0.91 ± .051
(.036 ± .002)
1.02
(.040)
DIA.
6 PLCS.
2.54
(.100) TERMINAL SPACING
PACKAGE DIMENSIONS PCB MOUNTING BRACKET
"L"
1.27
(.050)
DIA.
4 PLCS.
2X
1.80
(.071)
6.60 ±0.38
(.260 ± .015)
2X
5.08
(.200)
4.70
(.185)
ELECTRICAL SCHEMATIC
2.54
(.100)
CCW
3
1
CW
2
ANTI-ROTATION LUG
(Style "A" Shown)
0.80 ± 0.30
(.031 ± .012)
0.41
(.016)
5.70
(.224)
SHAFT FLAT
ORIENTATION
SUGGESTED PANEL LAYOUT
6.20
(.244)
1.52
(.060)
132 ° ± 5 °
CCW END
2.26
DIA.
(.089)
BUSHING DIAMETER
TOLERANCE
+0.25
( +.010)
.25
FOR TOLERANCES SHOWN: .XX = ± (.010)
.XXX = ± .13
(.005)
SHAFT DIMENSIONS ± .80
(1/32)
DIMENSIONS:
MM
(INCHES)
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
51/53 - Sealed 1/2 ” (12.5 mm) Square Control
Shaft/Bushing Styles
9.53
(.375)
3/8-32UNEF-2A
How To Order
1.60 ± 0.25
OPT.
(.063 ± .010)
1.194 ± 0.10
OPT.
(.047 ± .004)
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
Part number for multiple
section potentiometers
must have a taper
and resistance value
for each section.
6.35
9.53
SHAFT
BUSHING
(.250)
(.375)
RoHS IDENTIFIER
L
Compliant
6.35
(.250)
0.79 ± 0.25
OPT.
(.031 ± .010)
1/4-32UNEF-2A
0.79 ± 0.10
OPT.
(.031 ± .004)
3.18
6.35
SHAFT
BUSHING
(.125)
(.250)
9.53
(.375)
15.88
(.625)
MAX. FLAT LENGTH
1.52 ± 0.25
OPT.
(.060 ± .010)
3/8-32UNEF-2A
6.35
9.53
SHAFT
BUSHING
(.250)
(.375)
5.49 ± 0.10
OPT.
(.216 ± .005)
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)
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
ELEMENT TAPER
TYPE/TOLERANCE
Code Description
(A)
Linear Cermet ±10 %
(H)
Linear Cermet ±5 %
(B)
(E)
Linear C-P ±20 %
Linear C-P ±10 %
(C)
CW Audio Cermet
±10 %
CCW Audio Cermet
±10 %
(F)
8.0
(.315)
M6 X .075-6g
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)
3.0
6.0
SHAFT
BUSHING
(.118)
(2.36)
8.0
(.315)
1.52 ± 0.25
(.060 ± .010)
0.79 ± 0.10
(.031 ± .004)
U Style Bushing
STD. LENGTH ‘L’
.630
(16.0)
.866
(22.0)
.984
(25.0)
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
M7 X .075-6g
4.0
7.0
SHAFT
BUSHING
(.157)
(2.75)
9.5
(.374)
1.80 ± 0.25
(.071 ± .010)
1.00 ± 0.10
(.039 ± .004)
M10 X 0.75-6g
6.0
10.0
SHAFT
BUSHING
(.236)
(.394)
DIMENSIONS:
MM
(INCHES)
R Style Bushing
STD. LENGTH ‘L’
.630
(16.0)
.866
(22.0)
.984
(25.0)
Code
B
C
E
R
T
U
(D)
(S)
CW Audio C-P ±20 %
CW Audio C-P ±10 %
(G)
CCW Audio C-P
±20 %
CCW Audio C-P
±10 %
(T)
(Y)
CW Dual Audio
Taper C-P ±20 %
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
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
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
Boldface features are Bourns standard options. All others are available with higher
minimum order quantities.
REV. 12/14
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
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