How to wire a tact switch?

Publish Time:2023-04-03 Author:jiaxi Views:379

What is a tact switch?

tact switch is an electronic component switch that we often need to use in modern life, we often say that the four-foot light touch switch is on the switch has four feet, the use of this switch is very wide, especially in home appliances like remote control, audio and video products, communication products, digital products, toys, etc. will be used. So do you understand the light touch switch, know its principle and how to wire the light touch switch? The next can give you a detailed introduction to its related knowledge.


TS45H Inserting Terminal Tact Switch

Light touch switches are also known as key switches, which first appeared in Japan. In order to meet the operating force conditions in the use of light touch switches need to apply pressure to the switch, so as to achieve the function of connecting and disconnecting. When the pressure is withdrawn, the switch is disconnected. The internal structure of a light contact switch relies on metal shrapnel to protect the force applied to the switch and to turn it on and off.


What is the working principle of a light contact switch?

The principle of a light contact switch is relatively simple. When we press the button of a light contact switch, the spring will be deformed by the force of the spring and will contact the solder plate downwards and successfully connect the four pins of the switch, thus enabling the circuit to be switched on. When the force is withdrawn, the tabs return to their original state and the pins are not connected to each other, so the circuit is closed.


TSTP1243 Momentary Tactile Button Switch

How do you wire a tact switch?

There will be three wires in total, the fire wire is connected to the switch and the other end of the switch is connected to the L end of the two-hole three-hole socket. The neutral wire is connected directly to the N end of the two-hole, three-hole socket and the other earth wire is connected to the earth end of the three-hole socket. The correct connection is L for the power supply, L1 and L2 for the dual control reciprocating wire and N for the zero wire.


When soldering the terminals of a light contact switch, if a load is added to the terminals, they may become loose, deformed or have deteriorated electrical characteristics depending on the conditions, which we should be aware of. When using circuit boards, it is necessary to check the soldering conditions beforehand, as the thermal stress may change. When soldering twice, the second time is required after the first soldering has reached room temperature, otherwise continuous heating may cause deformation of the peripheral areas, loosening of the terminals, dislodgement and deterioration of the electrical characteristics. These switches are intended for direct human operation and should not be used for mechanical testing functions.


When selecting a tact switch, we should be aware that the quality of the product will directly affect the use of the product, so when selecting it, we should pay attention to its solderability, fire resistance, conductivity and other properties, the longevity of the service life and how tactile it is also determines the quality of the switch.