Keyboard Switch Comparison: Differences between Mechanical and Polar Magnetic

The keyboard switch is one of the most crucial components of a keyboard, determining the pressure, actuation method, feel, and overall stability and durability of each keystroke. Currently, the two most mainstream and discussed types in the keyboard market are mechanical keyboard switches and polar magnetic keyboard switches.

This article will analyze the structure, actuation method, feel differences, and durability of these two types of keyboard switches, and further explain hot-swapping to help readers gain a clear understanding and provide guidance for purchasing.

Keyboard Switch Basics

What is a Keyboard Switch?

The keyboard switch is the core structure at the bottom of each key on the keyboard responsible for triggering input. When a user presses a key, the switch converts the mechanical action into an electrical signal, which the computer recognizes and outputs letters, numbers, or function commands.

It affects important keyboard performance indicators, including: key feel, actuation distance and pressure, response speed, tactile feedback or sound, and lifespan and stability. Therefore, the keyboard switch is considered the "soul of the keyboard."

Basic Working Principle of a Keyboard Switch

Most switches consist of keycaps, key switch housings, springs, and actuation components.

The basic working principle is as follows:

(1) Pressing a key；

(2) The actuation mechanism detects the action and generates a signal；

(3) The computer outputs a response；

(4) The user lifts their finger, and the switch resets under the action of the spring.

Different keyboard switches have different actuation methods, resulting in differences in feel and response speed.

Main Classifications of Keyboard Switches

In modern keyboard products, the mainstream keyboard switch types can be divided into Mechanical switches and Polar Magnetic switches. Different structures and different actuation principles result in drastically different user experiences.

Mechanical Keyboard Switch Analysis

Structural Characteristics of a Mechanical Keyboard Switch

Mechanical switches achieve switching through metal contacts and mechanical structures. Internal components include springs, sliders, and contacts. Based on their structure, mechanical switches can be further divided into:

Linear Switches: Linear switches have no distinct trigger point when pressed. The resistance gradually increases with the key travel until the key bottoms out. These switches offer a smooth, tactile feel, suitable for fast typing or gaming.

Tactile Switches: Tactile switches require overcoming some resistance upon pressing, reaching a trigger point where the resistance suddenly decreases and then gradually increases again until the key bottoms out. These switches offer a soft feel, reducing finger fatigue during long typing sessions, making them suitable for typing.

Clicky Switches: Clicky switches require overcoming some resistance upon pressing, reaching a trigger point before the key is activated. These switches offer a more distinct feel, allowing users to clearly perceive the key's trigger point, also suitable for typing.

The Tactile Experience of a Mechanical Keyboard Switch

Mechanical switches have a long history in the keyboard industry and enjoy widespread popularity. They offer clear feedback and a distinct tactile feel, with different types available to suit user preferences:

Linear: This type of keyboard switch provides a smooth feel without tactile bumps, making it more suitable for gamers;

Tactile: This type of keyboard switch has a soft feel but strong tactile bumps, providing a good typing experience, suitable for office work or writing;

Clicky: This type of keyboard switch has a distinct tactile feel, a crisp sound, and a satisfying typing experience, also geared towards typists.

The Actuation and Response of a Mechanical Keyboard Switch

The actuation point and actuation force of mechanical switches are relatively fixed:

Actuation travel: The actuation travel of this type of keyboard switch is 2.0±0.6mm, which is shorter than that of a polar magnetic keyboard switch;

Actuation force: The actuation force of this type of keyboard switch is approximately 60±20gf, which is higher than that of a polar magnetic keyboard switch.

This makes it more suitable for users who require a stable feel and rhythm.

Lifespan of a Mechanical Keyboard Switch

Due to its physical contact structure, its consistency decreases over time. Better brands have a lifespan of approximately 50-80 million keystrokes, but this will still change due to wear and tear.

Advantages of a Mechanical Keyboard Switch

A variety of options are available on the market, and the feel can be selected based on the specific model, but complete customization is not possible;

After years of research and development, the overall structure is mature, and there is a long-standing production base;

Good repair-ability, making it easy for users to maintain and replace.

Limitations of a Mechanical Keyboard Switch

Contacts are prone to wear, leading to a decline in the feel over time, potentially causing problems such as poor tactile feedback;

Some models are noisy, and their use in public places is not recommended to avoid disturbing others;

Precision is limited by the mechanical structure, and the travel distance cannot be customized, which may not satisfy some consumers.

Polar Magnetic Keyboard Switch Analysis

Structural Features of the Polar Magnetic Keyboard Switch

The polar magnetic keyboard switch utilizes the Hall effect principle, generating a signal through changes in the distance between a magnet and a sensor.

Its characteristics are:

It employs a special effect, triggering without physical contact, resulting in an optimized internal structure;

Triggering does not rely on metal contacts, reducing the alloy components required for a mechanical keyboard switch;

The signal is generated through the Hall effect, allowing for precise measurement of the sensing position and improving the tactile feel.

The Tactile Experience of the Polar Magnetic Keyboard Switch

Due to its structure without physical obstructions, the polar magnetic switch offers a smoother overall feel:

A softer feel, suitable for most users;

Less tactile feedback, with most designs using linear switches, resulting in no noticeable typing sound;

The actuation point can be customized by the manufacturer or adjusted using an app, making it commonly used in gaming keyboards.

Polar Magnetic Keyboard Switch Trigger and Response

The core advantage of the polar magnetic switch is its adjust-ability:

Its trigger point and actuation distance can be adjusted using software, allowing for user customization;

Response speed can be made faster with a customized travel distance, giving you an edge in gaming;

Game response is more sensitive, more accurately detecting every keystroke.

Polar Magnetic Keyboard Switch Lifespan

Because there is no physical contact, there is no wear and tear, resulting in a mechanical lifespan of over 100 million keystrokes, far exceeding the performance of a mechanical keyboard switch.

Advantages of the Polar Magnetic Keyboard Switch

More sensitive actuation, smoother feel, no noticeable resistance;

Long mechanical lifespan, high stability, suitable for long-term use, reducing replacements;

Easily noiseless, mellow texture, won't disturb others in public places or during work hours.

Limitations of Polar Magnetic Keyboard Switches

Compared to mechanical keyboard switches, polar magnetic keyboard switches are slightly more expensive and may require a certain budget;

Different brands have significantly different magnetic switch designs, resulting in limited compatibility;

Currently, there are fewer types of polar magnetic keyboard switches available, with most being linear, limiting choices.

Keyboard Switch and Hot-Plugging

What is Hot-Plugging?

Hot-plugging refers to keyboard switches that can be directly plugged in and replaced without soldering. This feature allows users to freely switch between different types of keyboard switches, making it easy for them to create their own customized devices.

Conditions for Supporting Hot-Plugging

The keyboard switch PCB and stem use a socket connection, and the keyboard circuitry can support the plug-and-play design.

Benefits of Hot-Plugable Keyboard Switches

Easier for users to replace switches; they can learn directly through online tutorials without needing professional expertise.

Allows users to quickly experience the feel of different keyboard switches by purchasing and replacing different products, choosing the one that best suits their needs.

Lowers the barrier to keyboard repair, eliminating the need for soldering and reducing the difficulty of replacement.

Do Mechanical and Polar Magnetic keyboard switches support hot-swapping?

Mechanical keyboard switch: Manufacturers with mature production lines have achieved widespread support, and hot-swapping technology is mature.

Polar Magnetic keyboard switch: Currently, some brands' technology is not yet fully mature and depends on the design, but Unionwell's polar magnetic keyboard switch fully supports hot-swapping.

Keyboard Switch Feel Comparison

Actuation Point and Actuation Distance

Mechanical: Actuation point is fixed after factory manufacturing and cannot be changed by the user;

Polar Magnetic: Actuation point can be customized, and can be adjusted using an app after purchase.

Feedback Performance

Mechanical: Models with various performance characteristics (tactile/linear/click) are available on the market;

Polar Magnetic: Most products focus on linear smoothness, with fewer options offering tactile/click types.

Sound Feedback

Mechanical: Some click models are very loud, not recommended for use in public places;

Polar Magnetic: Quieter and smoother, with a mellow texture, also suitable for work environments.

Long-Term Use Comfort

Mechanical: Comfort varies between switch models, requiring individual user preference;

Polar Magnetic: Suitable for high-speed, long-term typing, offering a comfortable and stable feel, accepted by most users.

How to Choose the Right Keyboard Switch

Feel Preference

You can choose based on your personal feel. If you prefer tactile or clicky keys, consider a mechanical keyboard switch; if you prefer linear keys, a polar magnetic keyboard switch is the better choice.

Keystroke Sound

If you don't care much about keyboard sound or value the typing noise, a mechanical keyboard switch is a good idea; if you want a quiet keyboard in the workplace or for personal use, a polar magnetic keyboard switch is recommended.

Actuation Point

If you don't need adjustable actuation point, consider a mechanical keyboard switch; if you want to customize the key travel, a polar magnetic keyboard switch is the best choice.

Budget

If your budget is limited, consider a mechanical keyboard switch; if your budget allows, a polar magnetic keyboard switch is better for long-term use.