MODEL 91
3/8” Diameter
Single Turn
Cermet Trimming
Potentiometer
ELECTRICAL
1
Standard Resistance Range, Ohms
Standard Resistance Tolerance
Input Voltage, Maximum
Slider Current, Maximum
Power Rating, Watts
End Resistance, Maximum
Actual Electrical Travel, Nominal
Dielectric Strength
Insulation Resistance, Minimum
Resolution
Contact Resistance Variation, Maximum
ENVIRONMENTAL
10 to 2Meg
±20%
250 Vdc or rms not to exceed power rating
100mA or within rated power, whichever is less
0.5 at 70°C derating to 0 at 125°C
2 Ohms
174°
500 Vrms
1,000 Megohms
Essentially infinite
1% or 1 Ohm, whichever is greater
Temperature Coefficient, Maximum
Operating Temperature Range
Thermal Shock
Moisture Resistance
Shock, 6ms Sawtooth
Vibration
High Temperature Exposure
Rotational Life
Load Life at 0.5 Watts
Resistance to Solder Heat
MECHANICAL
±100ppm/°C
–55°C to +125°C
5 cycles, –55°C to +125°C (1%
∆RT,
1%
∆VR)
Ten 24 hour cycles (1%
∆RT,
IR 100 Megohms Min.)
100G’s (1%
∆RT,
1%
∆VR)
20G’s, 10 to 2,000 Hz (1%
∆RT,
1%
∆VR)
250 hours at 125°C (2%
∆RT,
2%
∆VR)
200 cycles (3%
∆RT)
1,000 hours at 70°C (2%
∆RT)
260°C for 10 sec. (1%
∆RT)
Mechanical Stops
Stop Strength
Torque, Starting Maximum
Weight, Nominal
Specifications subject to change without notice.
Solid
12 oz.-in. (0.085 N-m)
5oz.-in. (0.042 N-m)
.03 oz. (0.85 grams)
1-83
Model 91
TOP ADJUSTMENT (Inch/mm)
Model 91A
.20
5.08
.375
9.525
Max. Dia.
Arrow Indicates Slider Position. Electrical Adjustments
May Be Made With A Phillips Or Blade Screwdriver And Is Fingertip Adjustable.
.050
.034
Wide X
Deep
Slot:
1.270
0.864
.385
9.779
Max.
For Blade
Screwdriver
.20
5.08
(2)
(1)
.10
2.54
.15 For Phillips
3.81 Screwdriver
.18
4.57 Min.
(3)
.20
5.08
.20
5.08
Model Number
Marked On This Surface
Standoffs (2)
.020
±
.005
Dia.
0.508
±
0.127
Solderable
Terminals
Resistance Value
Marked On This Surface
.10
2.54
Model 91B
(3)
(1)
.25
6.35
Max. .18
4.57
Min.
.10
2.54
(2)
.20
5.08
.10
2.54
Model 91C
(3)
(2)
.344
8.738
(1)
.172
4.369
.25
6.35
Max. .18
4.57
Min.
.156
3.962
.10
2.54
Model 91E
(2)
.25
6.35
Max.
.18
Min.
4.57
.20
5.08 .40
10.2
(3)
(1)
.10
2.54
.20
5.08
.015
±
.005
0.381
±
0.127
True Radius (Typ.)
1-84
Model 91
SIDE ADJUSTMENT (Inch/mm)
1
Model 91T
.345
8.763
Max.
(1)
.20
5.08
(2)
(3)
.10
2.54
.18
Min.
4.57
.10
2.54
Model 91V
.40
10.2
Max.
(1)
.344
8.738
(2)
(3)
.172
4.369
.18
Min.
4.57
.156
3.962
Model 91W
.25
6.35
Max.
(1)
.20
5.08
(2)
(3)
.10
2.54
.18
Min.
4.57
Model 91X
.345
8.763
Max.
(1)
.20
5.08
(2)
(3)
.10
2.54
.18
Min.
4.57
.10
2.54
1-85
Model 91
STANDARD RESISTANCE VALUES, OHMS
10
20
50
100
200
500
1K
2K
5K
10K
20K
25K
50K
100K
200K
250K
500K
1Meg
2Meg
PACKAGING
Standard:
Boxes
Capacity
=
100 Units
ORDERING INFORMATION
Standard:
91 A R 10K LF
Model Series
Pin Style
RoHS Compliant Product Code - Optional
Resistance Value
Resistance Prefix
CIRCUIT DIAGRAM
NOTES
Metric equivalents, based on 1 inch = 25.4mm are
rounded to the same number of significant figures
as in the original English units and are provided for
general information only.
Tolerances unless otherwise specified:
Linear = ± .01 inches (.25mm)
Angular = ± 2 degrees
(2)
(1)
CW
(3)
INCH
mm
1-86
Model 91
