PL
IA
N
T
Features
n
Available in a variety of pin-out
Applications
n
Test and measurement equipment
n
Medical and laboratory equipment
n
Avionics controls
configurations
n
Virtually infinite electrical circuit isolation
n
Extended rotational life
n
RoHS compliant*
LE
AD
F
RE
E
*R
oH
S
C
OM
Model 91, 92, 93 & 95 - Long Life Series
Conductive Plastic Element
Initial Electrical Characteristics
1
Ro VE LEA
HS RS D
C ION FRE
OM S E
PL AR
IA E
NT
*
Standard Resistance Range .................................................................................................................................................. 1K, 5K, 10K ohms
Total Resistance Tolerance ......................................................................................................................................................................... 10 %
Independent Linearity .................................................................................................................................................................................±2 %
Effective Electrical Angle ....................................................................................................................................................................240 ° ± 5 °
Output Smoothness ............................................................................................................................................................... 0.15 % maximum
Dielectric Withstanding Voltage (MIL-STD-202, Method 301)
Sea Level ......................................................................................................................................................................1,500 VAC minimum
70,000 Feet ......................................................................................................................................................................500 VAC minimum
Insulation Resistance (500 VDC) ...............................................................................................................................1,000 megohms minimum
Power Rating (Voltage Limited By Power Dissipation or 350 VAC, Whichever Is Less)
+70 °C Single Section Assembly .........................................................................................................................................................1 watt
+70 °C Multiple Section Assembly ......................................................................................................................................0.5 watt/section
+125 °C ................................................................................................................................................................................................0 watt
Theoretical Resolution ............................................................................................................................................................ Essentially infinite
Environmental Characteristics
1
Operating Temperature Range ......................................................................................................................................................-40 °C to +125 °C
Storage Temperature Range..........................................................................................................................................................-55 °C to +125 °C
Temperature Coefficient Over Storage
Temperature Range..........................................................................................................................................................................±1,000 ppm/°C
Vibration (Single Section) ....................................................................................................................................................................................15 G
Total Resistance Shift..................................................................................................................................................................±2 % maximum
Voltage Ratio Shift.......................................................................................................................................................................±5 % maximum
Shock (Single Section) ........................................................................................................................................................................................30 G
Total Resistance Shift..................................................................................................................................................................±2 % maximum
Voltage Ratio Shift.......................................................................................................................................................................±5 % maximum
Load Life ................................................................................................................................................................................................. 1,000 hours
Total Resistance Shift................................................................................................................................................................±10 % maximum
Rotational Life (No Load) ................................................................................................................................................................ 1,000,000 cycles
Total Resistance Shift........................................................................................................................................................±15 % TRS maximum
Moisture Resistance (MIL-STD-202, Method 103, Condition B)
Total Resistance Shift........................................................................................................................................................±10 % TRS maximum
Insulation Resistance (500 VDC)................................................................................................................................... 100 megohms minimum
IP Rating........................................................................................................... IP40 (potentiometer body); IP65 (shaft and bushing interface only)
Moisture Sensitivity Level .........................................................................................................................................................................................1
ESD Classification (HBM) .....................................................................................................................................................................................N/A
Mechanical Characteristics
1
Stop Strength (A & R Bushings)............................................................................................................................................... 45.19 N-cm (4 lb.-in.)
(C & U Bushings) .............................................................................................................................................. 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, except where noted in the part number.
NOTE: Performance specifications do not apply to units subjected to printed circuit board cleaning procedures.
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 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.
Model 91, 92, 93 & 95 - Long Life Series
Product Dimensions
SHAFT TYPE "E"
(USES BUSHING C)
0.79 ± 0.25
(.031 ± .010)
0.79
(.031)
STD. LENGTHS:
12.0
(.500)
16.0
(.625)
19.0
(.750)
SHAFT TYPE "G"
(USES BUSHING A)
1.60+.38/-.00
(.063+.015/-.000)
6.32+.010/-.025
(.2490+.0004/.0010)
DIA.
1.194
(.047)
12.70
(.500)
STD. LENGTHS:
15.88
19.05
(.625) (.750)
22.23
(.875)
SHAFT TYPE "H"
(USES BUSHING A)
“F” ± .38
(“F” ± .015)
6.32+.010/-.025
(.2490+.0004/.0010)
DIA
5.486 ± .051
(.216 ± .002)
STD. LENGTHS:
19.05
(.750)
22.23
(.875)
FLAT LENGTH “F”:
7.95
(.313)
11.13
(.438)
3.16
(.1245)
DIA
SHAFT TYPE "J"
(USES BUSHING R)
1.80 ± 0.25
(.071 ± .010)
6.00+.000/-.035
(.2362+.0000/.0010)
DIA
STD. LENGTHS:
16.0
(.630)
22.0
(.866)
TOLERANCES EXCEPT AS SHOWN: .XX = ±
1.00 ± 0.13
(.039 ± .054)
.02
(.050)
.005
.XXX = ±
(.127)
.0005
.XXXX = ±
(.0127)
MM
DIMENSIONS:
(INCHES)
How to Order
91
A
2
A
-
G
28
-
L
15
/
L
15
L
Part number for multiple section potentiometers must have
a taper and resistance value for each section.
A
D
# SECTIONS
1 Single
2 Dual
ANTI-ROTATION LUG
Single .305 ” (7.8 mm) R,
90 °CW
No Lug
SHAFT
LENGTH
(FMS)
Code Description
16
1/2 ” L
20
5/8 ” L
24
3/4 ” L
28
7/8 ”L
32
1”L
16
22
16 mm L
22 mm L
METRIC
AVAILABLE
ONLY IN
BUSHING
Code
A, C
A, C
A, C
A
A
R
R
ELEMENT TAPER
TYPE/TOLERANCE
L
Long Life Linear C-P
±10 %
RoHS IDENTIFIER
L
Compliant
A
C
R
BUSHING
Metal Plain 3/8 ” (9.53 mm) D x 3/8 ” (9.53 mm) L
Metal Plain 1/4 ” (6.35 mm) D x 1/4 ” (6.35 mm) L
Metal Plain 10 mm D x 9 mm L
RESISTANCE CODE
VALUE IN OHMS
(10) - 1 K
(13) - 5 K
(15) - 10 K
91
92
93
95
MODEL
Single-Turn, In-Line PC Pins
Single-Turn, In-Line J-Hooks
Single-Turn, L-Pattern PC Pins
Single-Turn, Triangle-Pattern Solder Lugs
SHAFT TYPE
E
G
H
J
Metal Single Slotted 1/8 " (3.18 mm) D
Metal Single Slotted 1/4 " (6.35 mm) D
Metal Single Flatted 1/4 " (6.35 mm) D
Metal Single Slotted 6 mm D
AVAILABLE ONLY IN
LENGTHS
BUSHINGS
(CODE)
(CODE)
16, 20, 24
C
16, 20, 24, 28
A
24, 28
A
Metric 16, 22
R
Boldface
features are Bourns standard options.
All others are available with higher minimum order quantities.
REV. 04/18
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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