MODEL 91
1
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 70C derating to 0 at 125C
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 55C to +125C
Thermal Shock 5 cycles, 55C to +125C (1% RT, 1% VR)
Moisture Resistance Ten 24 hour cycles (1% RT, IR 100 Megohms Min.)
Shock, 6ms Sawtooth 100Gs (1% RT, 1% VR)
Vibration 20Gs, 10 to 2,000 Hz (1% RT, 1% VR)
High Temperature Exposure 250 hours at 125C (2% RT, 2% VR)
Rotational Life 200 cycles (3% RT)
Load Life at 0.5 Watts 1,000 hours at 70C (2% RT)
Resistance to Solder Heat 260C 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.
Model 91
1-83TOP ADJUSTMENT (Inch/mm)
Model 91A
.375
Arrow Indicates Slider Position. Electrical Adjustments
9.525
.20
May Be Made With A Phillips Or Blade Screwdriver And Is Fingertip Adjustable.
Max. Dia.
5.08
.034 .050
Slot: Wide X Deep
0.864 1.270
.385
9.779
For Blade
.15 For Phillips Max.
Screwdriver Model Number
.20
3.81
Screwdriver
Marked On This Surface
5.08
.20 .18
Min.
4.57
5.08
Resistance Value
(2) Standoffs (2)
(3)
(1) Marked On This Surface
.10
.020 .005
Dia.
2.54
0.508 0.127
.20 .10
Solderable
5.08 2.54
Terminals
Model 91B
.25
6.35
Max.
.18
4.57
(3) (1)
Min.
(2)
.10 .10
2.54
2.54
.20
5.08
.25
Model 91C
6.35
Max.
.18
4.57 .156
Min. 3.962
(3)
(1)
(2) .172
.10
4.369
.344 2.54
8.738
.18
Model 91E
Min.
4.57
.25
6.35
(2)
Max.
.20
5.08
.40
10.2
(3) (1)
.10
.015 .005
2.54 0.381 0.127
.20
True Radius (Typ.)
5.08
Model 91
1-84