MODEL 89
1
3/4 Rectangular
Multiturn
Cermet Trimming
Potentiometer
ELECTRICAL
Standard Resistance Range, Ohms 10 to 2Meg
Standard Resistance Tolerance 10% (<100 Ohms = 20%)
Input Voltage, Maximum 200 Vdc or rms not to exceed power rating
Slider Current, Maximum 100mA or within rated power, whichever is less
Power Rating, Watts 0.75 at 85C derating to 0 at 125C
End Resistance, Maximum 2 Ohms
Actual Electrical Travel, Turns, Nominal 20
Dielectric Strength 1,000 Vrms
Insulation Resistance, Minimum 1,000 Megohms
Resolution Essentially infinite
Contact Resistance Variation, Maximum 1% or 1 Ohm, whichever is greater
ENVIRONMENTAL
Seal 85C Fluorinert (No Leaks)
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 0.75 Watts 1,000 hours at 70C (2% RT)
Resistance to Solder Heat 260C for 10 sec. (1% RT)
MECHANICAL
Mechanical Stops Clutch Action, both ends
Torque, Starting Maximum 5 oz.-in. (0.035 N-m)
Weight, Nominal .05 oz. (1.4 grams)
Fluorinert is a registered trademark of 3M Company.
Specifications subject to change without notice.
Model 89
1-77LOW PROFILE (Inch/mm)
Model 89P and 90P
.093 .01
Metal Adjustment Screw: Dia. With
2.36 0.25
.025 .005 .031 .005
Model No. And
Wide X Deep Slot
0.635 0.127 0.787 0.127
Resistance Value
Marked On This
Or Opposite
.19
.75 .060 .015
Surface 4.83
C
19.05 1.524 0.381
L
.25
Solderable
.175
6.35
Min. Terminal Pins (3)
4.445
.185 .015
(1) (2) (3)
4.669 0.381
.015 .005
0.381 0.254
.021 .003 Dia.
.20
.050 .015
0.533 0.076 Typ.
5.08
.015
.50 .125 .015
1.270 0.381 .10
0.381
12.70 3.175 0.381
2.54
Standoff
2 Places
Model 89P dimensions applicable to all other models except as noted.
Model 89W
(1) (2) (3)
.100 .015
.20
2.540 0.381 .20
5.08
5.08
.50 .125 .015
12.70 3.175 0.381
Model 89X
(1) (2) (3)
.30
0.25
.050 .015
7.62 0.635
1.270 0.381
.10
.70 2.54
17.78
Model 89
1-78