1、 Working principle

1. Physical trigger: When the button is pressed, the internal metal spring (usually gold-plated phosphor copper) is compressed and deformed, causing the upper and lower contacts to make contact with the conductive circuit.

2. Automatic reset: After release, the spring piece relies on its own elasticity to restore its original state, and the contact separates to disconnect the circuit.

3. Electrical characteristics: Contact resistance is usually less than 100m Ω, and the lifespan can reach 100000-500000 presses (high-end models have over 1 million presses).

2、 Structural characteristics

3、 Classification method

1. By size:

   
   

• Ultra small (3 × 3mm), standard type (6 × 6mm), large (12 × 12mm)

  
  

2. By triggering method:

   
   

• Normally open (default disconnect, press to conduct)

• Normally closed (default on, press to disconnect)

3. According to installation method:

   
   

• Surface mount (SMD), suitable for automated production

• Direct insertion (DIP, hand soldering friendly)

4. Special functional type:

   
   

• Equipped with LED indicator light, waterproof type, silent type (silicone buffer)

  
  

4、 Application scenarios

1. Consumer Electronics:

   
   

• Mobile phone side keys, gamepad buttons, smartwatch knob (short stroke precise control)

  
  

2. Home appliances:

   
   

• Microwave oven panel, air conditioning remote control (requiring high temperature/moisture

  
  

3. Industrial control:

   
   

• Emergency stop button for instruments and meters (high lifespan model, anti vibration)

  
  

4. Automotive Electronics:

   
   

• In car central control buttons (certified by automotive standards, resistant to extreme temperatures)