The word  switch is interpreted as opening and closing. It still refers to an electronic component that can open a circuit, interrupt current, or allow it to flow to other circuits. A very common switch is an electromechanical device that is operated by a person and has one or several electronic contacts. The "closed" of the contact indicates that the electronic contact is conductive, allowing current to flow through; The "open" of the switch indicates that the electronic contact is not conducting, forming an open circuit that does not allow current to flow.

Classified by purpose: wave switch, band switch, recording and playback switch, power switch, pre selection switch, limit switch, control switch, conversion switch, isolation switch, travel switch, wall switch, intelligent fire switch, etc.

Classified by structure: micro switch, boat type switch, toggle switch, toggle switch, button switch, button switch, as well as trendy membrane switch and point switch.

Classified by contact type: Switches can be divided into three types of contacts: A-type contacts, B-type contacts, and C-type contacts. The contact type refers to the relationship between the operating condition of "closing the contact after operating (pressing) the switch" and the contact state. It is necessary to select the appropriate contact type switch according to the purpose.

Classified by the number of switches: single control switch, dual control switch, multi control switch, dimming switch, speed control switch, splash box, doorbell switch, induction switch, touch switch, remote control switch, intelligent switch, plug-in power switch, and bathroom heater specific switch.

main parameter

Rated voltage: refers to the voltage allowed by a switch during normal operation If the voltage applied across the switch is greater than this value, it will cause ignition and breakdown between the two contacts.

Rated current: refers to the non hazardous current allowed to pass through when the switch is turned on. When this value is exceeded, the contacts of the switch will burn out due to excessive current.

Insulation resistance: refers to the resistance value between the conductor and insulation parts of the switch, and the insulation resistance value should be above 100M Ω.

Contact resistance: refers to the resistance value between each pair of contacts when the switch is in the open state Generally, it is required to be below 0.1-0.5 Ω, and the smaller the value, the better.

Lifespan: refers to the number of times a switch can be operated under normal working conditions Generally required to be around 5000-35000 times.