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 %
Absolute Minimum Resistance ...................................................................2 ohms maximum .................................. 2 ohms maximum
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
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
Moisture Resistance (MIL-STD-202, Method 103, Condition B)
Total Resistance Shift ...........................................................................±10 % TRS ............................................ ±5 % TRS
IP Rating .....................................................................................................IP 64 ...................................................... IP 64
Starting (All Sections) ........................................................................................................................Running torque +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 or Triple Section) .................................................................................................................................. 0.35 to 1.8 N-cm (0.5 to 2.5 oz.-in.)
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, resistance value and date code.
Ganging (Multiple Section Potentiometers) ....................................................................................................................................................6 cups maximum
Hardware ...........................................One lockwasher and one mounting nut is shipped with each potentiometer, except where noted in the part number.
1
At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted.
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
51/53 - Sealed 1/2 ” (12.5 mm) Square Control
Product Dimensions
PACKAGE DIMENSIONS
24.15 ± 0.33
(.950 ± .021)
16.51 ± 0.25
(.650 ± .010)
8.89 ± 0.18
(.350 ± .007)
.64
"L"
( .025)
MODEL 51
6.35
(.250)
12.5
(.492)
11.00
DIA.
(.432)
6.25
(.246)
7.00
(.275)
0.74
(.029)
7.62
(.300)
FMS
5.08
(.200)
1.32
(.052)
TYP.
2.54
(.100)
C OF POT
L
0.30
(.0118)
5.08 ± 0.30
(.200 ± .012)
7.62 ± 0.30
(.300 ± .012)
3X
.66 ± .05
(.026 ± .002)
7.62 ± 0.30
(.300 ± .012)
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)
(SINGLE, DUAL AND TRIPLE MODULE SHOWN)
AVAILABLE IN 1 THROUGH 6 MODULE VERSIONS.
2.54
( .100)TERMINAL SPACING
PACKAGE DIMENSIONS PCB MOUNTING BRACKET
24.13 ± 0.33
(.950 ± .013)
12.5
(.492)
11.00
DIA.
(.432)
0.74
(.029)
1.32 ± 0.25
(.052 ± .010)
2X
5.08 ± 0.30
(.200 ± .012)
7.62 ± 0.30
(.300 ± .012)
6.35 ± .25
(.250 ± .010)
7.62 ± 0.30
(.300 ± .012)
2X
SOLDER LUG TERMINALS
MODEL 53
6.25
(.246)
7.00
(.275)
2.40
(.094)
3
2
1
.64
"L"
( .025)
5.0 ± 0.51
(.197 ± .002)
0.90
(.036)
.41 ± .05
( .016 ± .002)
5.08
(.200)
2.54
(.100)
6.60 ±0.38
(.260 ± .015)
5.08
(.200)
2X
1.80
(.071)
4.70
(.185)
0.91 ± .051
(.036 ± .002)
ELECTRICAL SCHEMATIC
CCW
1
2
3
CW
AVAILABLE IN 1 THROUGH 6 MODULE VERSIONS.
ANTI-ROTATION LUG
(Style "A", 90 CW Shown)
0.80 ± 0.30
(.031 ± .012)
0.41
(.016)
1.52
(.060)
5.70
(.224)
SHAFT FLAT
ORIENTATION
SUGGESTED PANEL LAYOUTS
The Model 50 can be used with either
of the two panel layouts shown below.
6.20
(.244)
6.35
(.250)
132 ° ± 5 ° CCW END
2.20
(.087)
BUSHING DIAMETER
0.80
( .031)
2.77
(.109)
BUSHING DIAMETER
0.80
( .031)
DIMENSIONS:
MM
(INCHES)
.25
FOR TOLERANCES SHOWN: .XX = ± (.010)
.XXX = ± .13
(.005)
SHAFT DIMENSIONS ± .80
(1/32)
Specifications are subject to change without notice.
Customers 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)
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)
1.60 ± 0.25
OPT.
(.063 ± .010)
51
A
A
D
-
B
28
-
A
15
L
3/8-32UNEF-2A
6.35
9.53
SHAFT
BUSHING
(.250)
(.375)
1.194 ± 0.10
OPT.
(.047 ± .004)
6.35
(.250)
C Style Bushing
0.79 ± 0.25
OPT.
(.031 ± .010)
RoHS IDENTIFIER
Code Description
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
1/4-32UNEF-2A
3.18
6.35
SHAFT
BUSHING
(.125)
(.250)
9.53
(.375)
0.79 ± 0.10
OPT.
(.031 ± .004)
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)
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
AR Lug 270 °CW
C
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
Triple No Detent
C
Quad No Detent
D
Single w/Center Detent
E
Double w/Center Detent
F
Triple w/Center Detent
G
Quad w/Center Detent
H
Five Section
J
Six Section
K
Five Section w/Detent
L
Six Section w/Detent
M
BUSHING CONFIGURATION
Code Description
3/8 ” D x 3/8 ” L
A
1/4 ” D x 1/4 ” L
C
1/4 ” D x 1/2 ” L
F
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
(B)
(E)
Linear C-P ±20 %
Linear C-P ±10 %
3/8-32UNEF-2A
6.35
9.53
SHAFT
BUSHING
(.250)
(.375)
5.49 ± 0.10
OPT.
(.216 ± .005)
(C)
(F)
12.70
(.500)
F Style Bushing
0.79 ± 0.25
OPT.
(.031 ± .010)
.031 ± .004
OPT.
(0.79 ± 0.10)
STD. LENGTH ‘L’
.625
(15.88)
.750
(19.05)
.875
(22.23)
1.000
(25.4)
CW Audio Cermet
±10 %
CCW Audio Cermet
±10 %
CW Audio C-P ±20 %
CW Audio C-P ±10 %
(D)
(S)
1/4-32UNEF-2A
.125
.250
SHAFT
BUSHING
(3.18)
(6.35)
(G)
(T)
.315
(8.0)
S Style Bushing
1.52 ± 0.25
(.060 ± .010)
0.79 ± 0.10
(.031 ± .004)
CCW Audio C-P
±20 %
CCW Audio C-P
±10 %
CW Dual Audio
Taper C-P ±20 %
M6 X .075-6g
3.0
6.0
SHAFT
BUSHING
(.118)
(2.36)
STD. LENGTH ‘L’
.394
(10.0)
.512
(13.0)
.630
(16.0)
.866
(22.0)
.984
(25.0)
(Y)
8.0
(.315)
U Style Bushing
1.52 ± 0.25
(.060 ± .010)
0.79 ± 0.10
(.031 ± .004)
M7 X .075-6g
4.0
7.0
SHAFT
BUSHING
(.157)
(2.75)
9.5
(.374)
STD. LENGTH ‘L’
.394
(10.0)
.512
(13.0)
.630
(16.0)
.866
(22.0)
.984
(25.0)
R Style Bushing
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)
STD. LENGTH ‘L’
.512
(13.0)
.630
(16.0)
.866
(22.0)
.984
(25.0)
Code
A
B
C
D
E
R
T
U
AVAILABLE ONLY IN
SHAFT TYPE
BUSHINGS
LENGTHS
Description
Code
Description
Single Plain 1/4 ”D
A
20,24,28,32
Single Slotted 1/4 ”D
A
12,16,20,24,28,32
Single Flatted 1/4 ”D
A
20,24,28,32
Single Plain 1/8 ”D
C, F
16,20,24,28,32
Single Slotted 1/8 ”D
C, F
12,16,20,24,28,32
Single Slotted 6 mmD
R
10,13,16,22,25
Single Slotted 4 mmD
U
10,13,16,22,25
Single Slotted 3 mmD
S
10,13,16,22,25
SHAFT
LENGTH
(FMS)
Code Description
12
3/8 ”
16
1/2 ”
20
5/8 ”
24
3/4 ”
28
7/8 ”
32
1”
Metric
10
10 mm
13
13 mm
16
16 mm
22
22 mm
25
25 mm
AVAILABLE
ONLY IN
BUSHING
Code
B, C
A, C
A, C, F
A, C, F
A, C, F
A, C, F
R, S, U, T
R, S, U, T
R, S, U, T
R, S, U, T
R, S, U, T
Boldface features are Bourns standard options. All others are available with higher
minimum order quantities.
REV. 09/22/10
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
