MODEL 25
1
1/4” Square
Single Turn
Cermet Trimming
Potentiometer
ELECTRICAL
Standard Resistance Range, Ohms
Standard Resistance Tolerance
Input Voltage, Maximum
Power Rating, Watts
End Resistance, Maximum
Actual Electrical Travel, Nominal
Dielectric Strength
Insulation Resistance, Minimum
Resolution
Contact Resistance Variation, Maximum
10 to 2Meg
±10%
250 Vdc or rms not to exceed power rating
0.5 at 70°C derating to 0 at 125°C
1% or 2 Ohm, whichever is greater
210°
900Vrms
1,000 Megohms
Essentially infinite
1% or 3 Ohm, whichever is greater
ENVIRONMENTAL
Seal
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
85°C Fluorinert® (No Leaks)
±100ppm/°C
–55°C to +125°C
5 cycles, –55°C to +125°C (2% ∆RT, 2% ∆VR)
Ten 24 hour cycles (3% ∆RT)
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 (2 Ohms +3% ∆RT)
1,000 hours at 70°C (3% ∆RT, 3% ∆VR)
350°C for 3 sec. (1% ∆RT)
MECHANICAL
Mechanical Stops
Stop Strength, Minimum
Torque, Maximum
Weight, Nominal
Solid
6 oz.-in. (500 gr-cm)
3 oz.-in. (200 gr-cm)
.01 oz. (0.3 grams)
Fluorinert® is a registered trademark of 3M Company.
Specifications subject to change without notice.
1-17
Model 25
