The classification of tact switch

Tact switches, also known as tactile switches or tactile pushbutton switches, can be classified based on various criteria such as structure, actuation force, operating life, and mounting type. Here are some common classifications of tact switches:

1. Based on Structure:

• Standard Tact Switches: These are the most common tactile switches with a simple push-button design and a tactile feedback mechanism.

• Illuminated Tact Switches: Equipped with built-in LEDs to provide visual feedback when the switch is pressed. They are often used in applications where a visual indication of the switch status is required.

• Sealed/Waterproof Tact Switches: Designed with additional sealing to protect the switch internals from environmental elements, making them suitable for applications where moisture or dust may be present.

• SMT (Surface Mount Technology) Tact Switches: Designed for surface mount applications on printed circuit boards (PCBs), eliminating the need for through-hole mounting.

2. Based on Actuation Force:

• Low-Force Tact Switches: Require minimal force to actuate and are often used in applications where a light touch is desired.

• Standard-Force Tact Switches: Have a moderate actuation force, providing a balance between sensitivity and tactile feel.

• High-Force Tact Switches: Require a relatively higher amount of force to actuate and are used in applications where a more deliberate press is desired.

3. Based on Operating Life:

• Standard Life Tact Switches: Have a typical lifespan of tens of thousands or hundreds of thousands of cycles. They are suitable for many general-purpose applications.

• Long Life Tact Switches: Designed for applications requiring a higher number of actuation cycles. They have a longer lifespan, often in the millions of cycles.

4. Based on Mounting Type:

• Through-Hole Tact Switches: Designed to be mounted through holes in a PCB. They have leads that are soldered to the board.

• Surface Mount Tact Switches (SMT): Designed for surface mount applications, where they are soldered directly onto the surface of the PCB.

5. Based on Configuration:

• SPST (Single Pole, Single Throw) Tact Switches: Have a single set of contacts and are the simplest form of tact switches.

• SPDT (Single Pole, Double Throw) Tact Switches: Have a common terminal and two positions, allowing the switch to connect the common to either of the two other terminals.

6. Based on Size and Form Factor:

• Miniature Tact Switches: Compact switches suitable for applications with limited space.

• Subminiature Tact Switches: Even smaller than miniature switches, often used in tiny electronic devices.