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CW switches are designed to perform to the standards listed when operated within ambient conditions detailed below:
Operating Temperature - 105ºC maximum, -20ºC minimum.
Relative Humidity - Switches will be operable and insulation resistance shall be greater than 100 megohms if allowed to dry for 100 hours at room temperature of 25ºC and after exposure for one hour in an atmosphere having 95% relative humidity and a temperature of 50ºC
High Voltage Breakdown - Minimum of 1000 volts RMS 60 Hz for one minute between parts of opposite polarity.
Contact Resistance - Less than 0.01 ohm at 20 milliamperes DC.
Life Cycling (No Load) - Switches will be operative after 10,000 (minimum) cycles at the rate of 10 cycles per minute.
Life Cycling (Load) - Switches will be operative after 6000 (minimum) cycles at the rate of 10 cycles per minute at rated load.
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CW switches will perform properly if they are installed and used properly. Causes for failure often encountered in the field that are the responsibility of the user are:- Removal of factory applied lubricants from switch contacts and moving parts.
- Introduction of foreign material into switching mechanism...flux, solder cleaning materials, potting compounds.
- Restriction of movement of switch button.
- Excessive heat often introduced while soldering.
- Switching loads in excess of rating.
Manufacturing Engineers are cautioned to avoid misusing switches and resultant switch failures.
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