Glossary

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  • Conductive Rubber:
    Elastomer filled with carbon or metallic particles which render the material electrically conductive.
  • Contact:
    The component of the switch that disengages to cause the actual circuit interruption.
  • Contact bounce (Bounce):
    The time during switching in which electrical instability (bounce) caused by the rebound of the contacts is observed. Relative mass of the contacts, forces and frequency of supporting members are all components that determine the extent of bounce. Total transfer time consists of the time for(...)
  • Contact Configuration:
    Poles, throws, and sequence designated by alpha characters.
  • Contact Force:
    The force that the movable contact in a switch exerts on the fixed terminal.
  • Contact Gap:
    The distance that separates two contacts when the circuit is open.
  • Contact Pressure:
    The amount of force holding the movable and stationary contacts together. While this should be termed Contact Force, by convention in the United States, it is called Contact Pressure.
  • Contact rating (Switching rating):
    The capacity to switch (connect or interrupt) an electrical load. Load characteristic (resistive, inductive, capacitive, power factor). Contrast with non-switching rating.
  • Contact Resistance (CR):
    Resistance, measured in milliohms, of an electrical circuit caused by the contacts.
  • Contact Wipe:
    Sliding of one contact on another during actuation of switch.
  • Contacts:
    Switch element, which directly provide make-break operation (circuit interruption).
  • Creepage:
    The unwanted flow of electrical current from one conductive part to another.
  • CSA (Canadian Standards Agency):
    A testing and safety certification agency.
  • Current-Carrying Capacity:
    Specified maximum current which can flow through the switch contacts. Determined by contacts size, shape, material and the force with which they are pressed together.
  • Current Rating:
    The nominal or name plate current capacity of a device. The maximum current rating, listed by UL, is the current that can be carried continuously without causing the temperature of the switch terminals to rise more than 30°C above the ambient temperature.