Micro Switch Types: Everything You Need To Know in 2023


One of the significant pieces in every circuit board is the control system; hence, it is crucial to carefully invest in switches to manage the entire circuitry with caution.

As its name indicates, Micro Switches are types of control instruments that are tiny in size. Apart from acting as a lever, it could act as a vital sensor in various industries.

Although it can be overwhelming to understand other switches, like a proximity sensor, Micro Switches are otherwise; they are straightforward and have a simple working principle. Furthermore, it can be easily controlled with a programmed action through it.

In order to fully understand them better, we’d like to tackle their definition, functionality, assembly, features, various types, advantages, disadvantages, and applications. Thus, it is recommended to finish the entire post by the end to comprehend the component completely.

Introduction to Micro Switch Types

Introduction to Micro Switch Types

What is a Micro Switch?

As stated, a Micro Switch falls under the category of controlling instruments but in a compactly designed manner. However, its purpose isn’t only limited to a lever but also to a sensor.

In essence, it is regarded as a snap-action, extremely narrow interface disparity transition valve. When a switch is defined as having a snap action, the pace at which contacts are made and broken is irrespective of the actuator’s operating point.

Another term for the Micro Switch would be Miniature Snap-Action Switch. In order to fully grasp the capabilities of this switch, we’d like to mention some of its distinctive characteristics compared with the typical switches that are macro in terms of dimensions.

First off, it is compact. Then, as for its functional level, it is at a minimal value that has a tenth of a millimeter. Following that, its electrical properties have been enhanced as well as its service life. Ultimately, it has minimal sensitivity to vibrations and optimum accelerations.

These specific switches are frequently highly appropriate for appearance and disappearance monitoring where direct physical touch with an entity is tolerated. In addition, they can perform well in situations when conserving weight and area is crucial and straightforward on-and-off operations are necessary.

What is a Micro Switch?

Detailed Information About Micro Switch

Assembly of a Micro Switch

There are various options for constructing a Micro Switch, especially when integrating its components. However, for demonstration purposes, we’d go for the standard components installed on a Micro Switch; they will be individually discussed below.


It can be regarded as a mechanical component, also known as an actuator; it is practically responsible for switching ON/OFF.


As its term indicates, it protects against unwanted substances externally.

Moving Piece

To operate the interfaces, the moving piece delivers electricity.


The role of support is straightforward; to act as a pillar of the Micro Switch.

NO Terminal

The phrase “NO Terminal” comes from its additional designation, “Normally Open Terminal.” According to this, the switch’s interface will always be accessible. As a result, no electricity flows across the connection if you link it to it.

NC Terminal

It is regarded that an NC Terminal is the complete opposite of a NO Terminal’s Function since the platform’s connections will be sealed in this scenario, thus, permitting current flow across the circuitry. Further, the phrase “NC Terminal” comes from its additional designation, “Normally Close Terminal.”


Its primary responsibility is to act as a regulator of electrical continuity since it has the capability to make and break them. Additionally, it is composed of a metal material; thus, they are conductive.

Moving Arm

It operates like a trigger in a flick and can be utilized to turn the on and off the Micro Switch.

How does a Micro Switch Function?

Similar to other switches, the functionality of a Micro Switch is identical. Once an entity has toggled the trigger of the switch, then its contacts will change to what they’re programmed. In order to fully understand the concept, we’ll chunk them into bits.

In a simple manner, if the plunger or actuator is resting, there are two (2) things going on. First, it can carry current if it is usually a closed circuit. Secondly, it is insulated electrically if it’s a normally open circuit. On the contrary, if the plunger is switched or toggled, two (2) things go on again. First, if it is usually a closed circuit, it is open. Secondly, if it ordinarily opens the circuit, then it is closed.

Features of Micro Switches

In order to fully understand the capabilities of a Micro Switch, we’d like to dissect its various characteristics to assess whether they are suited for one’s application.

  • A minor contract breach is observed in the snap-action pinpoint switching valve.
  • Almost all logic-level and power-duty demands work nicely with this valve.
  • It has varying switching options, like SPNO, SPNC, and SPDT.
  • It is by connections made of a silver alloy that power is regulated.
  • It has electrical terminations of various types.
  • In terms of interfaces for logic level, it can be simply controlled and can be made of silver alloy or gold plating.

Features of Micro Switches

Primary Characteristics of a Micro Switch

Types of Micro Switches

As we all know, various classes of Micro Switches depend on their purpose and functionality. Some of them are as follows:

Pin Plunger

Since the switch attributes can be used immediately, it is appropriate for brief frontal impulses, and high-precision position sensing is achievable. Yet, the minimum overtravel of any valve necessitates using an effective limiter.

Spring Pin Plunger

In contrast with a Pin Plunger with a short overtravel, the Spring Pin Plunger is the complete opposite. However, it is still possible to utilize this switch the same way as the Pin Plunger but with apparent caution. It is recommended that the weight should be at the center of the plunger to achieve stable equilibrium.

Panel Mount Pin Plunger

Among all of the Micro Switches Types, the Panel Mount Pin Plunger has the greatest overtravel; however, it still has a lot to offer. It is possible to attach this through a panel with the help of a particular nut, it can be manually and mechanically controlled, and it is feasible to utilize this in a low-speed cam.

Panel/Cross Mounted Roller Pin Plunger

This Micro Switch Type doesn’t differ much from the Panel Mount Pin Plunger; however, it has a clear distinction against it since it has a shorter overtravel and a roller welded into it. In terms of operation, it can be performed through a dog or cam.

Leaf Spring

Due to the apparent long stroke and firm leaf cushion, this actuator is appropriate for low-speed cams or cylinder movements. Given that the bearing position is defined, harm should be avoided by keeping the overtravel within the platform’s parameters.

Roller Leaf Spring

It is regarded that the Roller Leaf Spring has some similarities with the Leaf Spring; however, with a specified distinction. It possesses a roller and is suitable for dog and cam operations.

Leaf Lever

The handle is bent to produce a long swing; thus, it is excellent for spotting cams, dogs, and many other controlling devices.

Stimulated Roller Leaf Lever

It is considered a leaf lever with its bottom curved to allow use as a straightforward slider version.

Hinge Lever

The level’s form can be adjusted to fit the working body when used with a low-speed, low-torque cam. In the majority part, the trigger is constructed of steel.

Stimulated Roller Lever

It is considered to be a hinged lever that can be used as a specific roller type by having the tip curled into an arc.

Hinge Roller Lever

Essentially, it is a hinged lever with a roller on them that is ideal for high-speed operations.

Reverse Operation Hinge Lever

A multimeter can be used to inspect cold solder junctions. There are two efficient ways to use a tester for this purpose.

Reverse Operation Hinge Roller Lever

Its purpose and functionality are similar to the hinge lever; it is still made out of steel.

Rotating Operation

It is an actuator with little torque that rotates; thus, they are appropriate for locating light things, such as pennies and bills made of paper.

Flexible Rod

It may be turned 360 degrees to operate. Further, its driving power is small in quantity. Additionally, an excellent way to find inconsistent patterns in orientation or form. Ultimately, much room is available for operation item play since the actuator absorbs the overtravel.

Advantages, Disadvantages, and Applications of Micro Switches?

In order to assess whether a Micro Switch is necessary for one’s applications, we’d like to discuss its pros, cons, and various industries wherein they are necessary.


  • It offers fidelity in its performance.
  • It can arc at quick shifting rates and can lessen the harm caused by curving.
  • It provides consistent switching.
  • It is cost-efficient.
  • It offers life-long service and low maintenance.
  • They are versatile.
  • It is resistant to dust and water.
  • It is made out of durable and sturdy materials; thus, they are reliable.


Its limitations only appear if the materials and components utilized in building them are low-quality. Some of the resulting issues would be burning, depreciation, and shutdown of the overall device. However, this disadvantage can be addressed by selecting the appropriate manufacturer with extensive industry experience.



Overall, Micro Switches are an essential component in almost all electronic circuit boards. Further, its concept and working principle are straightforward compared to traditional switches. Ultimately, it comes with various types depending on their purposes and usage.

If there are some topics we haven’t covered in this article, which raise some confusion, do not hesitate to reach out. PCBTok guarantees hundred customer satisfaction; hence, you can guarantee that all of your concerns will be quickly addressed.

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