4 * 4 light touch switch is a switch that uses the button to push the transmission organization, make the dynamic contact and static contact press on or off, and complete the circuit replacement. The light touch key switch is a simple structure and widely used master electric appliance. In the electric automatic control circuit, it is used to manually announce the control signal to control the contactor, relay, electromagnetic starter, etc. Some people may not understand the 4 * 4 touch switch. Let's now look at the three aspects of the 4 * 4 touch switch.



1. 4 * 4 touch the switch panel:



(1) Abs: low grade DC socket, engineering plastic, changeable color and low strength





(2) PC material: strong impact resistance, heat resistance and high transparency





(3) Electric jade powder: non combustible, never discolored, never worn, strong thermochemistry





2. 4 * 4 light touch switch current carrying part, 4 * 4 light touch switch (copper)





(1) Brass: hard, slightly weak elasticity, medium conductivity, bright yellow





(2) Tin Phosphorus Bronze: hard, good elasticity, better conductivity than brass, and the toggle switch is red and yellow





(3) Red copper: slightly soft, good elasticity, high conductivity and purplish red





It is classified according to the switch connection method of switch socket: single pole, north-south pole, three pole switch, three pole plus neutral switch, two-way switch with public access line, two-way switch with one disconnection direction, north-south pole two-way switch key switch and two-way reversing switch (or medium direction switching)





Classify according to the disconnection method of switch contact of switch socket: contact breaking space ≥ 3mm; Contact breaking space ＜ 3mm; Normal air ground layout switch; Switches arranged in small open space shall be more than 1.2mm, and such switches shall be marked on the body“



Three materials of 4 * 4 light touch switch



3. 4 * 4 light touch switch contact





(1) Sterling Silver: low resistance, soft texture, low melting point, easy oxidation, easy to produce arc, burn wires or switching elements, waterproof 4 * 4 light touch switch, poor power on.





(2) Silver alloy: low resistance, wear-resistant texture, high melting point, oxidation resistance and induction performance are better than pure silver.