MODEL67

This is the description about MODEL67 of the 3/8" square multiturn cermet trimming potentiometer.

Here are the electrical specifications of MODEL67. Standard resistance range, Ohms is 10 to 2Meg. Standard resistance tolerance is ±10% (<100 Ohms = ±20%). Input voltage, maximum is 200 Vdc or rms not to exceed power rating. Slider current, maximum is 100mA or within rated power, whichever is less. Power rating, watts is 0.5 at 85°C derating to 0 at 125°C. End resistance, maximum is 2 Ohms. Actual electrical travel, turns, nominal is 20. Dielectric strength is 900 Vrms. Insulation resistance, minimum is 1,000 Megohms. Resolution is essentially infinite. Contact resistance variation, maximum is 1% or 1 Ohm, whichever is greater.

The environmental specifications of MODEL67 are these. Seal is 85°c fluorinert® (no leaks). Temperature coefficient, maximum is ±100ppm/°C (<100 Ohms = ±250ppm/°C). Temperature range is from 55°C to +125°C. Thermal shock is 5 cycles, 55°C to +125°C (1%RT, 1%VR). Moisture resistance is ten 24 hour cycles (1%RT, IR 1,000 megohms min.). 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).

The mechanical specifications of MODEL67  you may need. Mechanical stops is clutch action, both ends. Torque, starting maximum is 5 oz.-in. (0.035 N-m). Weight, nominal is .04 oz. (1.13 grams).

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