Model 91, 92, 93, 94 & 95 – 5/8 ˝ Square Single-Turn Panel Control
Features
n Available in a variety of pin-out
configurations
n Virtually infinite electrical circuit isolation
n Metal or plastic shaft options
n RoHS compliant*
Initial Electrical Characteristics1 Conductive Plastic Element Cermet Element
Standard Resistance Range
Linear Tapers (A, B, E, & H) ........................(B & E) 1 K ohms to 1 megohm ........................(A & H) 100 ohms to 1 megohm
Audio Tapers (C, D, F, G, S, & T) ................(D,G,S, & T) 1 K ohms to 1 megohm ...............(C & F) 1 K ohms to 1 megohm
Total Resistance Tolerance ............................... 10 % or 20 % .................................................... 5% or 10%
Independent Linearity .......................................±5 % .................................................................±5 %
Absolute Minimum Resistance .........................2 ohms maximum ............................................. 2 ohms maximum
Effective Electrical Angle ..................................(Linear tapers) 240 ° ± 5 ° ................................(Linear tapers) 240 ° ± 6 °
(Audio tapers) 225 ° ± 5 ° .................................(Audio tapers) 225 ° ± 6 °
Contact Resistance Variation ...........................±1 % .................................................................±1 % or 3 ohms (whichever is greater)
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level ....................................................1,500 VAC minimum ......................................... 1,500 VAC minimum
70,000 Feet .................................................500 VAC minimum ............................................ 500 VAC minimum
Insulation Resistance (500 VDC) .....................1,000 megohms minimum ................................1,000 megohms minimum
Power Rating (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less)
+70 °C Single Section Assembly ................(Linear tapers) 1 watt .......................................(Linear tapers) 2 watts
(Audio tapers) 0.5 watt .....................................(Audio tapers) 1 watt
+70 °C Multiple Section Assembly ..............(Linear tapers) 0.5 watt/section ........................(Linear tapers) 1 watt/section
(Audio tapers) 0.25 watt/section ....................... (Audio tapers) 0.5 watt/section
+125 °C .......................................................0 watt ................................................................ 0 watt
Theoretical Resolution ......................................Essentially infinite ............................................. Essentially infinite
Environmental Characteristics1
Operating Temperature Range .......................... -40 °C to +125 °C ............................................... -40 °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 % maximum ................................................ ±5 % maximum
Rotational Life (No Load) ................................... 100,000 cycles ................................................... 100,000 cycles
Total Resistance Shift ................................... (Linear tapers) 10 ohms or ±15 % TRS max. .... (All tapers) ±5 % TRS max.
(whichever is greater)
(Audio tapers) ±20 % maximum
Contact Resistance Variation
@ 50,000 cycles ........................................... (Linear tapers) ±2 % ........................................... ±2 %
(Audio tapers) ±3 % ........................................... ±3 %
Moisture Resistance (MIL-STD-202, Method 103, Condition B)
Total Resistance Shift ................................... (Linear tapers) ±10 % TRS maximum ............... (All tapers) ±5 % TRS maximum
(Audio tapers) ±20 % TRS maximum
Insulation Resistance (500 VDC) ................. 100 megohms minimum..................................... 100 megohms minimum
IP Rating ............................................................ IP 40 ................................................................... IP 40
Moisture Sensitivity Level .................................. 1 .......................................................................... 1
ESD Classification (HBM) .................................. N/A ...................................................................... N/A
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.
Model 91, 92, 93, 94 & 95 – 5/8 ˝ Square Single-Turn Panel Control
Mechanical Characteristics1
Stop Strength (1/4 ˝ D shaft) .............................................................................................................................................45.19 N-cm (4 lb.-in.)
(1/8 ˝ D shaft) ............................................................................................................................................33.89 N-cm (3 lb.-in.)
Mechanical Angle ................................................................................................................................................................................300 ° ±5 °
Torque
Starting .......................................................................................................................................... 0.3 max. above average running torque
Running Torque
Single or Dual Section (A & R Bushings) ...................................................................................... 0.21 to 1.06 N-cm (0.3 to 1.5 oz.-in.)
Single or Dual Section (C & U Bushings) ..................................................................................... 0.14 to 1.06 N-cm (0.2 to 1.5 oz.-in.)
Mounting .............................................................................................................................................1.7-2.0 N-m (15-18 lb.-in.) maximum
Variation ......................................................................................................................0.35 N-cm (0.5 oz.-in.) maximum in 45 ° shaft travel
Weight (Single Section, Metal Bushing) .............................................................................................................................12.7 grams nominal
(Each Additional Section) ...................................................................................................................................................4 grams nominal
Terminals .................................................................................................................................Printed circuit terminals, J-Hooks or solder lugs
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.
Marking ............................................................................Manufacturer’s trademark, date code, resistance, manufacturer’s part number.
Ganging (Multiple Section Potentiometers) ............................................................................................................................ 2 cups 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 U: H-37-3 & H-38-8)
NOTE: Performance specifications do not apply to units subjected to printed circuit board cleaning procedures.
1Electrical specifications tested at 200 RPM, at room ambient: +25 °C nominal.
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.
Model 91, 92, 93, 94 & 95 – 5/8 ˝ Square Single-Turn Panel Control
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.
Product Dimensions
.41
(.016)
10.16
(.40)
4.45 ± .38
(.175 ± .015)
5.59 ± .20
(.220 ± .008)
4.45 ± .38
(.175 ± .015)
2.54
(.100) 2.54
(.100)
5.08 ± 1.02
(.200 ± .040)
2.03
(.080)
3 PLCS.
(.040) WIDE X (.090) LONG
3 PLCS.
1.02 2.29
31
2
2
13
5.08
(.20) 1.52
(.06)
.254
(.010)
GAP
.79
(.031) 2 PLCS.
321
5.33 ± .76
(.21 ± .03)
1.52
(.06)
GAP
.81
(.032)
R. MAX.
3.81
(.150)
MAX. TYP.
321
120 ° ± 5 ° STD.
FLAT ORIENTATION
(SHAFT AT CCW END)
13
CCW
2
POTENTIOMETER
DIA.
13.72 ± 0.38
(.540 ± .015)
15.88
(.625)
22.86 ± 0.43
(.900 ± .017) 12.70 ± .229
(.500 ± .009)
MOUNTING
SURFACE
0.81 ± 0.05
(.032 ± .002)
2.54
(.100)
2.54
(.100)
0.79 ± .025
(.031 ± .010)
1.19
(.047)
“A” STYLE
A.R. LUG
R
1.37 ± 0.08
(.054 ± .003)
2.36 ± 0.08
(.093 ± .003)
7.92
(.312)
9.53
(.375)
15.29 ± 0.56
(.602 ± .022)
SEE
HOW TO ORDER
CHART FOR
BUSHING OPTIONS.
SEE
NEXT PAGE
FOR SHAFT
OPTIONS.
10.16 ± 0.30
(.400 ± .012)
33
22
11
R2 R1
11.05 ± 0.20
(.435 ± .008)
DIA.
13.72 ± 0.38
(.540 ± .015)
15.88
(.625)
22.86 ± 0.43
(.900 ± .017)
12.70 ± .229
(.500 ± .009)
MOUNTING
SURFACE
0.81 ± 0.05
(.032 ± .002)
2.54
(.100)
2.54
(.100)
0.79 ± .025
(.031 ± .010)
1.19
(.047)
“A” STYLE
A.R. LUG
R
1.37 ± 0.08
(.054 ± .003)
2.36 ± 0.08
(.093 ± .003)
7.92
(.312)
9.53
(.375)
12.7 ± 1.02
(.500 ± .040)
SEE
HOW TO ORDER
CHART FOR
BUSHING OPTIONS.
SEE
NEXT PAGE
FOR SHAFT
OPTIONS.
10.16 ± 0.30
(.400 ± .012)
33
22
11
R2 R1
11.05 ± 0.20
(.435 ± .008)
DIA. 5.08 ± 0.38
(.200 ± .015)
TOLERANCES EXCEPT AS SHOWN: DECIMAL .XXX ± (.015 )FRACTION ± 1/64
.XX ± (.38) ANGLE ±5 °
.381
9.65
L
L
0.81 ± 0.05
(.032 ± .002)
DIMENSIONS: MM
(INCHES)
Model 91, 92, 93, 94 & 95 – 5/8 ˝ Square Single-Turn Panel Control
Product Dimensions
Plastic
Shaft
Styles
1.60+.38/-.00
(.063+.015/-.000)
11.18 ± .38
(.440 ± .015)
1.60+.38/-.00
(.063+.015/-.000)
1.80 ± 0.25
(.071 ± .010) 1.50 ± 0.25
(.059 ± .010)
“F” ± .38
(“F” ± .015)
6.32+.000/-.152
(.249+.000/.006)
DIA.
6.30+.000/-.152
(.248+.000/.006)
DIA.
5.49
(.216)
6.32+.010/-.025
(.2490+.0004/.0010)
DIA.
1.194
(.047)
5.486 ± .051
(.216 ± .002)
1.19
(.047)
6.31+.025/-.051
(.2485+.001/.002)
DIA.
14.27 ± .25
(.562 ± .010)
1.80 ± .25
(0.07 ± .001)
1.00
(.04)
1.50 ± .25
(0.06 ± .001)
3.16+.00/-.15
(.1245+.000/-.006)DIA.
48 TOOTH
5.994 +0.000/-0.051
(.236 +.000/-.002)
DIA.
DIA.
3.988 +0.000/-0.051
(.157 +.000/-.002)
SHAFT TYPE "B" (USES BUSHING A) SHAFT TYPE "D" (USES BUSHING C) SHAFT TYPE "T" (USES BUSHING U)
SHAFT TYPE "C" (USES BUSHING A) SHAFT TYPE "R" (USES BUSHING R) SHAFT TYPE "W" (USES BUSHING A)
SHAFT TYPE "A" (USES BUSHING A) SHAFT TYPE "H" (USES BUSHING A)
SHAFT TYPE "V" (USES BUSHING U)
SHAFT TYPE "G" (USES BUSHING A)
SHAFT TYPE "J" (USES BUSHING R)
SHAFT TYPE "Y" (USES BUSHING A)
TOLERANCES EXCEPT AS SHOWN: .XX = ±
.79
(0.03)
STD. LENGTHS:
25.40
(1.00)
.02
(.050)
.XXX = ± .005
(.127)
.XXXX = ± .0005
(.0127)
6.32+.010/-.025
(.2490+.0004/.0010)
DIA
6.32+.010/-.025
(.2490+.0004/.0010)
DIA
1.00 ± 0.13
(.039 ± .054)
6.00+.000/-.035
(.2362+.0000/.0010)
DIA
12.70
(.500)
15.88
(.625)
19.05
(.750)
22.23
(.875)
25.4
(1.000)
16.0
(.630)
22.0
(.866)
19.05
(.750)
Metal
Shaft
Styles
0.79 ± 0.13
(.031 ± .054)
3.99+.000/-.035
(.1571+.0000/.0010)
DIA
8.74
(.344)
9.12
(.359) .762
(.030)
1.27
(.050)
1.57
(.062)
5.97
(.235)
21 °
5.03 ± .05
(.198 ± .002)
DIA.
DIA.
5.87
(.231)
STD. LENGTHS:
STD. LENGTHS:
STD. LENGTHS:
12.70
(.500)
15.88
(.625)
19.05
(.750)
22.23
(.875)
STD. LENGTHS:
19.05
(.750)
22.23
(.875)
12.70
(.500)
15.88
(.625)
19.05
(.750)
STD. LENGTHS:
12.70
(.500)
15.88
(.625)
19.05
(.750)
22.23
(.875)
STD. LENGTHS:
16.0
(.630)
22.0
(.866)
STD. LENGTHS:
16.0
(.630)
22.0
(.866)
STD. LENGTHS:
STD. LENGTHS:
STD. LENGTHS:
19.05
(.750)
22.23
(.875)
“F” ± .381
(“F” ± .015)
3.988 ± .076
(.157 ± .003)
SHAFT TYPE "S" (USES BUSHING R)
6.000+.000/-.035
(.2362+.0000/.0014)
DIA
0.79 ± 0.25
(.031 ± .010)
SHAFT TYPE "E" (USES BUSHING C)
0.79
(.031)
3.16
(.1245)
DIA
12.0
(.500)
16.0
(.625)
19.0
(.750)
STD. LENGTHS:
STD. LENGTHS:
16.0
(.630)
22.0
(.866)
STD. LENGTHS:
16.0
(.630)
22.0
(.866)
7.95
(.313)
11.13
(.438)
FLAT LENGTH “F”:
6.99
(.275)
12.98
(.511)
FLAT LENGTH “F”:
DIMENSIONS: MM
(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.
Model 91, 92, 93, 94 & 95 – 5/8 ˝ Square Single-Turn Panel Control
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.
Suggested Panel Layout
DIMENSIONS: MM
(INCHES)
DIMENSIONS: MM
(INCHES)
7.75
(.305)
2.79
(.110) DIA. DIM A
OPTIONAL:
OPTIONAL:
BUSHING DIM A
A9.91
(.39)
C6.73
(.265)
R10.5
(.413)
U7.5
(.295)
Hardware
LOCKWASHER H-37-1 NUT H-38-1
LOCKWASHER H-37-2
LOCKWASHER H-37-3
LOCKWASHER H-37-4
NUT H-38-2
NUT H-38-8
NUT H-38-9
6.6
(.26)
12.07 ± 0.25
(.475 ± .01)
0.64 ± 0.05
(.025 ± .002)
9.53 +0/-0.38
(.375 +0/-.015)
11 +0/-0.43
(.433 +0/-.017)
2.36 ± 0.25
(.093 ± .01)
30 ° ± 5 °
TYP.
1/4-32 UNEF
14.66 +0/-0.43
(.577 +0/-.017)
2.36 ± 0.25
(.093 ± .01)
30 ° ± 5 °
3/8-32 NEF-2B
10 ± 0.2
(.394 ± .008)
2 ± 0.2
(.079 ± .008)
30 ° ± 15 °
TYP.
M7 x .75
14 ± 0.2
(.551 ± .008)
2.9 ± 0.2
(.114 ± .008)
30 ° ± 15 °
TYP.
M10 x .75
9.58 ± 0.36
(.377 ± .014)
12.52 ± 0.36
(.493 ± .014)
0.56 ± 0.05
(.022 ± .002)
7.24 ± 0.38
(.285 ± .015)
12.45 ± 0.38
(.490 ± .015)
0.71 ± 0.18
(.028 ± .007)
10.41 ± 0.38
(.410 ± .015)
15.11 ± 0.51
(.595 ± .020)
0.56 ± 0.05
(.022 ± .002)
Date Code Description
YY = LAST TWO DIGITS OF YEAR
MANUFACTURED
WW = WEEK NUMBER
M = COUNTRY OF MANUFACTURE
(MEXICO)
Y
YWWM
How to Order Model 91, 92, 93, 94 & 95 Panel Controls
91 A 2 A - A 28 - A 15 / A15 L
ELEMENT TAPER RESISTANCE CODE
TYPE/TOLERANCE VALUE IN OHMS
(A) Linear Cermet ±10 % (05) - 100 (30) - 15 K
(H) Linear Cermet ±5 % (28) - 150 (16) - 20 K
(06) - 200 (17) - 25 K
(07) - 250 (18) - 50 K
(08) - 500 (20) - 100 K
(10) - 1 K (21) - 200 K
(11) - 2 K (22) - 250 K
(12) - 2.5 K (23) - 500 K
(13) - 5 K (25) - 1 M
(15) - 10 K
(B) Linear C-P ±20 % (10) - 1 K (18) - 50 K
(E) Linear C-P ±10 % (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
(C) CW Audio Cermet ±10 % (10) - 1 K (18) - 50 K
(D) CW Audio C-P ±20 % (12) - 2.5 K (20) - 100 K
(F) CCW Audio Cermet ±10 % (13) - 5 K (22) - 250 K
(G) CCW Audio C-P ±20 % (15) - 10 K (23) - 500 K
(S) CW Audio C-P ±10 % (17) - 25 K (25) - 1 M
(T) CCW Audio C-P ± 10 %
AVAILABLE ONLY IN
SHAFT TYPE LENGTHS BUSHINGS
(CODE) (CODE)
B Plastic Single Slotted 1/4 " (6.35 mm) D 16, 20, 24, 28 A
C Plastic Single Flatted 1/4" (6.35 mm) D 24, 28 A
D Plastic Single Plain 1/8" (3.18 mm) D 16, 20, 24 C
R Plastic Single Slotted 6 mm D Metric 16, 22 R
T Plastic Single Slotted 4 mm D Metric 16, 22 U
W Plastic Single Knurled 1/4" (6.35 mm) D 32 A
A Metal Single Plain 1/4" (6.35 mm) D 16, 20, 24 A
E Metal Single Slotted 1/8" (3.18 mm) D 16, 20, 24 C
G Metal Single Slotted 1/4" (6.35 mm) D 16, 20, 24, 28 A
H Metal Single Flatted 1/4" (6.35 mm) D 24, 28 A
J Metal Single Slotted 6 mm D Metric 16, 22 R
S Metal Single Flatted 6 mm D Metric 16, 22 R
V Metal Single Slotted 4 mm D Metric 16, 22 U
A Metal Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L
C Metal Plain 1/4 ” (6.35 mm) D x 1/4 ” (6.35 mm) L
R Metal Plain 10 mm D x 9 mm L
U Metal Plain 7 mm D x 9 mm L
MODEL
9
1 Single-Turn, In-Line PC Pins
92 Single-Turn, In-Line J-Hooks
9
3 Single-Turn, L-Pattern PC Pins
9
4 Single-Turn, L-Pattern J-Hooks
9
5 Single-Turn, Triangle-Pattern Solder Lugs
# SECTIONS
1 Single
2 Dual
BUSHING
A Single .305 ” (7.8 mm) R,
90 °CW
D No Lug
ANTI-ROTATION LUG
RoHS IDENTIFIER
CompliantL
Part number for multiple section potentiometers must have
a taper and resistance value for each section.
Boldface features are Bourns standard options.
All others are available with higher minimum order
quantities.
SHAFT AVAILABLE
LENGTH ONLY IN
(FMS) BUSHING
Code Description Code
16 1/2 ”L A, C
20 5/8 ”L A, C
24 3/4 ”L A, C
28 7/8 ”L A
32 1 ”L A
METRIC
16 16 mmL R, U
22 22 mmL R, U
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.
REV. 10/20
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
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns® products manufactured by or on behalf of Bourns, Inc. and
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Unless otherwise expressly indicated in writing, Bourns® products and data sheets relating thereto are subject to change
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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®WYVK\J[PUH\ZLYHWWSPJH[PVUTH`]HY`
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the user’s sole risk.
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