How to Connect a Push Button Switch in a Circuit?

Connect a push button switch is not known to most people who have never been in contact with production. It is very dangerous to operate connect a push button switch without an electrician; therefore, if you are a DIY enthusiast, I like to modify small electrical appliances, small toys, etc., so you must understand the knowledge of connect a push button switch before you start so that you can better help you complete DIY and eliminate the small accidents caused by connect a push button switch.

Basic knowledge of Connect a push button switch


Generally speaking, two sides of metal push button switch are the indicator light pin, the middle side by side are the switch pin. The function of the switch is reset, the middle of three is public pin, find out which two pins are normally open after connected. Then connect lamp’s two pins wire with the front two pins in series, so that you can achieve the function you want.

connect a push button switch

The material of metal push button has gold, stainless steel, copper, etc., which provide more and more choices for people. Metal push buttons are widely used in below home appliance.

Kitchen household appliances, such as juice drink machines, coffee machine, juicer.

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Business machine, such as coin-operated machines, vending machines, building model, bank alarm equipment, access control security car, wheelbarrow, balance electric cars, computers and peripheral equipment,

Household appliances, such as smoke wet machine, electronic door lock system, lamps and lanterns, small appliances, intelligent furniture, stereo equipment. And medical equipment, communications equipment, cleaning equipment, etc.

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The connect a push button switch plays a different role on different devices.

How to use the metal push button?


This depends on how many pins of the metal push button, the following styles are Filn’s metal push buttons, such as 2 pins, 3 pins, 4 pins, 5 pins, 6 pins, 7 pins, 8 pins, 9 pins, 10pins.

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For different number of feet, the push buttons’ functions are also different.

Before introducing how to connect the wire, you need to know the normally open and normally closed function of the switch. Normally open and normally closed, which two to use, depends on the requirements of the circuit.

For example, a simple self-locking circuit is that a button normally closed is stop, while button normally open is start. The connected state without pressing the button is called normally closed, but it is disconnected after pressing the button.

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When the button is not pressed, it is disconnected, called normally on, and when the button is pressed, it is connected. So choose your feet according to your needs.

Below is the function and wiring mode of the metal button corresponding to the number of pin of the filn metal push button.

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2 pins, it is a normally open style, you just need to connect 2 wires.


3 pins, it is 1 normally open and 1 normally closed without lights. We only need to connect the public pin and the function you need. The product with the word C is the public pin, NO is the normally open pin while NC is the normally closed pin.


4 pins, it is normally open with light. 2 are switch feet and two are lamp feet. Generally, plus and minus is indicated on the product as a lamp pin. The other two are the corresponding switch pins, switch pin and light pin are generally in the opposite position, which can be known by testing. Besides, filn’s light generally don’t distinguish positive and negative poles.

Button switch wiring

5pins, it is 1 normally open and 1 normally closed with light, its 3 pins connect normally open and normally closed. 2 pins connect lamp bead, and also don’t distinguish the positive and negative pole. For the connection mode, please refer to the pin 3.

push button switch wiring

6pins, they are divided into three cases.


Case 1, 22mm old style is 1 normally open and 1 normally closed with lights, still 2 pins, but 1 normally open and 1 normally closed are composed of 4 pins, and there is no public pin. Pins are usually marked the number of 1, 2, 3 , 4. Number 1 and 4 are normally open while number 2 and 3 are normally closed.

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Case2, 1 normally open and 1 normally closed with two-color lights, there will be 3 pins representing the function of 1NO1NC. But there will also be 3 pins representing two-color lights, with one common cathode and common anode pin. The other two pin represent different lights respectively.

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Case 3, 2 normally open and 2 normally closed without light, it is dual and similar to 3 pins. But it is with 3 more pins.


7 pins, 1 normally open and 1 normally closed with three-color light, it is similar to case 2, however, the light has three colors.


8 pins, 2 normally open and 2 normally closed with dual light.


9 pins, 2 normally open and 2 normally closed with dual light.


10pins, 2 normally open and 2 normally closed with three-color light, it is similar to cases 6, 7, 8.

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In a word, the extra pins are just to provide more different functions, for example, two normally open and two normally closed light, single-color light, two-color light and three-color light.


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