MODEL78

MODEL78 is a a typeof 1-1/4" rectangular multiturn cermet trimming potentiometer.

There are some electrical charactersitics about MODEL78.Standard Resistance Range is 10 Ohms  to 2Meg Ohms .Standard Resistance Tolerance is ±10% (<100 Ohms = ±20%).Input Voltage, Maximum is 300 Vdc or rms not to exceed power rating.Slider Current, Maximum is 100mA or within rated power, whichever is less.Power Rating is 1.0 Watts  at 70°C derating to 0 at 125°C.End Resistance, Maximum is 2 Ohms.Actual Electrical Travel, Turns, Nominal is 22.Dielectric Strength is 500 Vrms.Insulation Resistance, Minimum is 1,000 Megohms.Resolution is essentially infinite.Contact Resistance Variation, Maximum is 1% or 1 Ohm, whichever is greater.Otherwise, there are also some electrical characteristics about it.Temperature Coefficient, Maximum is ±100ppm/°C.Operating Temperature Range is 55°C to +125°C.Thermal Shock is 5 cycles,55°C to +125°C (1% RT, 1% VR).Shock,6ms Sawtooth is 100G's (1% RT, 1% VR).Vibration is 20G's, 10 to 2,000 Hz (1% RT, 1% VR).High Temperature Exposure is 250 hours at 125°C (2% RT, 2% VR).Rotational Life is 200 cycles (3% RT).Load Life at 0.5 Watts is 1,000 hours at 70°C (2% RT).Resistance to Solder Heat is 260°C for 10 sec. (1% RT).

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