1
1-83 Model 91
MODEL 91
3/8” Diameter
Single Turn
Cermet Trimming
Potentiometer
ELECTRICAL
Standard Resistance Range, Ohms 10 to 2Meg
Standard Resistance Tolerance ±20%
Input Voltage, Maximum 250 Vdc or rms not to exceed power rating
Slider Current, Maximum 100mA or within rated power, whichever is less
Power Rating, Watts 0.5 at 70°C derating to 0 at 125°C
End Resistance, Maximum 2 Ohms
Actual Electrical Travel, Nominal 174°
Dielectric Strength 500 Vrms
Insulation Resistance, Minimum 1,000 Megohms
Resolution Essentially infinite
Contact Resistance Variation, Maximum 1% or 1 Ohm, whichever is greater
ENVIRONMENTAL
Temperature Coefficient, Maximum ±100ppm/°C
Operating Temperature Range –55°C to +125°C
Thermal Shock 5 cycles, –55°C to +125°C (1% ∆RT, 1% ∆VR)
Moisture Resistance Ten 24 hour cycles (1% ∆RT, IR 100 Megohms Min.)
Shock, 6ms Sawtooth 100G’s (1% ∆RT, 1% ∆VR)
Vibration 20G’s, 10 to 2,000 Hz (1% ∆RT, 1% ∆VR)
High Temperature Exposure 250 hours at 125°C (2% ∆RT, 2% ∆VR)
Rotational Life 200 cycles (3% ∆RT)
Load Life at 0.5 Watts 1,000 hours at 70°C (2% ∆RT)
Resistance to Solder Heat 260°C for 10 sec. (1% ∆RT)
MECHANICAL
Mechanical Stops Solid
Stop Strength 12 oz.-in. (0.085 N-m)
Torque, Starting Maximum 5oz.-in. (0.042 N-m)
Weight, Nominal .03 oz. (0.85 grams)
Specifications subject to change without notice.
.10
2.54
.20
5.08
.25
6.35
Max.
.18
4.57
.20
5.08.40
10.2
.015 ± .005
0.381 ± 0.127
True Radius (Typ.)
(2)
(3) (1)
Min.
Model 91E
Model 91
1-84
.375
9.525
Max. Dia.
Arrow Indicates Slider Position. Electrical Adjustments
May Be Made With A Phillips Or Blade Screwdriver And Is Fingertip Adjustable.
For Phillips
Screwdriver
Dia.
Resistance Value
Marked On This Surface
Model Number
Marked On This Surface
For Blade
Screwdriver
Slot: .034
0.864
.15
3.81
.20
5.08
.20
5.08
.18
4.57
.20
5.08
Wide X
Min.
Deep
.050
1.270
.10
2.54
(1) (3)
(2)
.10
2.54
.20
5.08
.385
9.779
Max.
.020 ± .005
0.508 ± 0.127
Solderable
Terminals
Standoffs (2)
Model 91A
TOP ADJUSTMENT (Inch/mm)
(3)
(2)
(1)
.10
2.54
.20
5.08
.25
6.35
Max. .18
4.57
Min.
.10
2.54
Model 91B
(3)
(2)
(1)
.172
4.369
.25
6.35
Max. .18
4.57
Min.
.10
2.54
.156
3.962
.344
8.738
Model 91C
1
1-85 Model 91
.10
2.54
(3)
(2)
(1)
.20
5.08
.18
4.57
.345
8.763
Max.
.10
2.54
Min.
Model 91X
.10
2.54
(3)
(2)
(1)
.20
5.08
.18
4.57
.345
8.763
Max.
.10
2.54
Min.
Model 91T
SIDE ADJUSTMENT (Inch/mm)
.172
4.369
(3)
(2)
(1)
.344
8.738
.18
4.57
.40
10.2
Max.
.156
3.962
Min.
Model 91V
.10
2.54
(3)
(2)
(1)
.20
5.08
.18
4.57
.25
6.35
Max.
Min.
Model 91W
91 A R 10K LF
Model Series
Pin Style
RoHS Compliant Product Code - Optional
Resistance Value
Resistance Prefix
1-86 Model 91
CIRCUIT DIAGRAM
(1)
(2)
(3)
CW
NOTES
mm
INCH
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
Standard:
PACKAGING
ORDERING INFORMATION
Standard:Boxes
Capacity = 100 Units
STANDARD RESISTANCE VALUES, OHMS
10 200 5K 50K 500K
20 500 10K 100K 1Meg
50 1K 20K 200K 2Meg
100 2K 25K 250K
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
BI Technologies:
91VR50KLF
TT Electronics:
91AR100K 91AR10 91AR1MEG 91AR2MEG 91VR50K 91XR50KLF 91CR50LF 91BR10KLF 91CR10KLF
91ER10KLF 91AR10KLF 91WR20LF 91ER1KLF 91AR10LF 91TR20KLF 91VR20KLF 91WR20KLF 91AR20LF
91TR500KLF 91XR500KLF 91BR500KLF 91VR500KLF 91WR500KLF 91CR500KLF 91AR500KLF 91ER500KLF
91AR100LF 91ER100LF 91CR100LF 91BR100LF 91WR1KLF 91AR1KLF 91TR200LF 91VR200LF 91WR200LF
91VR100KLF 91TR100KLF 91XR100KLF 91BR100KLF 91ER100KLF 91CR100KLF 91WR100KLF 91AR100KLF
91ER20LF 91XR500LF 91CR5KLF 91WR2KLF 91CR20LF 91WR5KLF 91TR50KLF 91WR50KLF 91AR5KLF
91WR25KLF 91TR25KLF 91VR25KLF 91WR100LF 91VR100LF 91TR100LF 91XR200LF 91CR2MEGLF
91ER2MEGLF 91WR2MEGLF 91BR2MEGLF 91VR2MEGLF 91TR2MEGLF 91XR2MEGLF 91CR2KLF 91TR1KLF
91WR10KLF 91VR10KLF 91TR10KLF 91WR50LF 91XR20KLF 91AR50LF 91WR500LF 91VR500LF
91TR500LF 91CR1KLF 91XR5KLF 91AR200KLF 91TR200KLF 91ER200KLF 91CR200KLF 91WR200KLF
91XR200KLF 91VR200KLF 91BR200KLF 91BR5KLF 91VR2KLF 91VR1KLF 91TR50LF 91BR500LF 91CR500LF
91AR500LF 91ER500LF 91BR1MEGLF 91VR1MEGLF 91TR1MEGLF 91ER1MEGLF 91XR1MEGLF
