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What Is An Electrical Micro Miniature Snap-Action Switch?

Views: 24     Author: China Micro Switch Manufacturer     Publish Time: 2020-07-23      Origin: https://www.unionwells.com/

A miniature snap-action switch, also trademarked and frequently known as a micro switch, is an electric switch that is actuated by very little physical force, through the use of a tipping-point mechanism, sometimes called an "over-center" mechanism.

This might sound like a pretty confusing term if you are just hearing it for the first time. But not to worry, I’m sure it is something you have heard before and are very used to. An electrical snap switch is necessary for opening or closing a circuit. It can also be used to manipulate current inside a circuit. If you have heard of micro switch before, then you should be cool with that terminology because it is the same with electrical snap switch. Having unraveled the mystery behind the electrical snap switch, here is the part where you get to learn about every tiny and important detail of it. 

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Directing current?

It is important for you to realize that electrical snap switches are necessary for controlling the direction of current. They are usually made up of two of more contact points. The contacts will have to be mounted upon an insulated assembly. They are positioned in such a way that the multiple contacts keep moving into and out of position to enable the current to move in different direction. Thanks to a suitable operation mechanism it is easy to move the contacts into and out of position. Their assembly is usually insulated to prevent the contacts from ever shorting themselves. 

They are small in size

This is why they are known as miniature electrical snap switch. They are not big at all. As small as they are though, you can see all their components. You can clearly see all their contact points, legs, and assembly area. Their small size makes them suitable and fitting for almost all types of devices where they are slotted into. Therefore, if you think of an electrical snap switch, you can think of small electro-mechanical items that can help in current control, as well as in other duties. 

Uses spring button

While they are commonly known as micro switches, a more appropriate name for this components is known as snap action switch. They can be used to manually alternate power between electrical or electronics devices. And the alternation is usually achieved by pushing a spring supported button. That is not say that electrical snap switch are only made up of spring buttons. In the course of the micro switch’s operation, you will hear the spring move back and forth, as a means of changing the direction of the current. 

Basic mode of operation

The operation principle of an electric snap action switch is very simple and straightforward. But before you can understand how this little component functions, you will need to open it apart and watch how all the components relate with one another internally.

First, you need to come to terms with all the parts of the switch. It comprises the common, normal open, and normal closed. These 3 components have a unique way of interacting with one another to ensure the smooth operation of the micro switch. The common is the one point that looks the same to the normal open and normal close. 

So when two appliances are connected to the normal open and normal close, the positive from the power source finds its way to the common of the switch. Anytime you press touch the switch to change its state, the spring will be moved by the lever. That way, the micro switch can easily change state and send power between the two appliances. This simple activity is what makes it easy for an electrical snap switch to enable current redirection whenever it is pressed. 

Control systems

Electrical snap action switches have a wide range of use within control systems. They represent an economic way to switch current between different appliances or circuits. That is, when the snap action switch is linked to the live wire (where current is coming in from), the contact makes and breaks between the normal open and normal closed contacts. So when the micro switch is toggled, it releases the current to either of the two devices. If you are still confused about how micro switches act as control systems, you can dig through the internet and check various simple circuit diagrams to get sufficient knowledge on how it works. 

The latest breeds

The first set of electrical snap action switch may have had some troubles with being sturdy back then. They were very active and efficient, but with very little force, they would be crushed and they will not be able to function accordingly. Thankfully, all of that has faded away long time ago. The latest breed of electrical snap action switch can now work in environments with high water moisture and nothing will happen to it. They have been improved to withstand other sudden pressure while their efficient has equally been beefed up. You need to start thinking about including snap action switches in your electrical projects. 


Electrical snap action switches are equally reliable. They have been one of the best components for securing home appliances of all kinds. The possibility of a micro switch failing to change into the required state at any point in time is very slim. They have been designed to respond to those changes immediately because that is how they can protect your appliances. So it simply means you can count on these devices to be of help in this regard. 

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Electrical snap action switch is just another name for micro switch. You can call it whichever one you prefer and you would still be correct. Electrical snap action switch has a simple mode of operation. If you have a full grasp of how the mechanism actuates its change of state, it will be easier for you to make use of it. Actually, there are so many things you can achieve with micro switches. As an electronic appliances manufacturer, you are supposed to give electrical snap switches a serious thought if you are not using them already in your circuits.

For more about micro swithes,please contact unionwell at https://www.unionwells.com


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