MODEL 89
3/4” Rectangular
Multiturn
1
Cermet Trimming
Potentiometer
ELECTRICAL
Standard Resistance Range, Ohms
Standard Resistance Tolerance
Input Voltage, Maximum
Slider Current, Maximum
Power Rating, Watts
End Resistance, Maximum
Actual Electrical Travel, Turns, Nominal
Dielectric Strength
10 to 2Meg
10ꢀ ꢁ(100 Ohms ꢂ 20ꢀꢃ
200 Vdc or rms not to exceed power rating
100mA or within rated power, whichever is less
0.75 at 85°C derating to 0 at 125°C
2 Ohms
20
1,000 Vrms
Insulation Resistance, Minimum
Resolution
1,000 Megohms
Essentially infinite
Contact Resistance Variation, Maximum
1ꢀ or 1 Ohm, whichever is greater
ENVIRONMENTAL
Seal
85°C Fluorinert® ꢁNo Leaksꢃ
100ppmꢄ°C
Temperature Coefficient, Maximum
Operating Temperature Range
Thermal Shock
Moisture Resistance
Shock, 6ms Sawtooth
Vibration
–55°C to +125°C
5 cycles, –55°C to +125°C ꢁ1ꢀ ∆RT, 1ꢀ ∆VRꢃ
Ten 24 hour cycles ꢁ1ꢀ ∆RT, IR 100 Megohms Min.ꢃ
100G’s ꢁ1ꢀ ∆RT, 1ꢀ ∆VRꢃ
20G’s, 10 to 2,000 Hz ꢁ1ꢀ ∆RT, 1ꢀ ∆VRꢃ
250 hours at 125°C ꢁ2ꢀ ∆RT, 2ꢀ ∆VRꢃ
200 cycles ꢁ3ꢀ ∆RTꢃ
High Temperature Exposure
Rotational Life
Load Life at 0.5 Watts
Resistance to Solder Heat
1,000 hours at 70°C ꢁ2ꢀ ∆RTꢃ
260°C for 10 sec. ꢁ1ꢀ ∆RTꢃ
MECHANICAL
Mechanical Stops
Torque, Starting Maximum
Weight, Nominal
Clutch Action, both ends
5 oz.-in. ꢁ0.035 N-mꢃ
.05 oz. ꢁ1.4 gramsꢃ
Fluorinert® is a registered trademark of 3M Company.
Specifications subject to change without notice.
Model 89
1-77