Overview of Micro Switch Models

The document lists various micro switch models including HK-04G, HK-04G-L, DK4, HK-10, FSK-14, FSK-18, FSK-20, GNY51, HK-08, HK-25, GNY53-5K, GNY51-4, and FSK-21. These switches are primarily used as micro switches or button switches in electrical applications.

Mechanical and Dimensional Specifications

Dimensions for multiple models are provided in millimeters, with typical sizes such as 19.9 x 9.6 x 6.5 mm for the DK4 series and 8.5 x 2.7 x 8.1 mm for the HK-08 series. Detailed measurements include hole diameters (e.g., ∅2.4, ∅2.5, ∅3.1), lengths, widths, and tolerances (e.g., ±0.15 mm). The document also includes PCB hole layouts and free-state and pressed-state resistance values for switches with built-in resistors.

Electrical Specifications

• DK4 Series: Rated for 0-10.1(3)A at 125/250VAC, 40T125μ; also variants rated 0-6A at 36VDC.
• HK-08 Series: Rated at 1A, 15V DC, 40T120 2E4.

Contact materials are silver, ensuring long lifespan and high reliability.

Material and Construction

The DK4 series features a shell with a top and bottom cover structure that is seamless and dustproof. The housing is injection molded using high flame-retardant and high-temperature resistant materials, providing heat resistance and non-deformation during soldering.

Mechanical Features and Customization

• HK-08 series uses a spring-driven fast-action mechanism with high sensitivity.
• Push rods and plungers can be customized in shape and terminal specifications.
• Various terminal types and actuator forms are available to suit different applications.

Additional Notes

The document includes circuit diagrams indicating switch states and resistance values (R1 and R2) for normally closed functions. It also highlights waterproof micro switch variants (e.g., FSK-20 internal resistor series).

Summary of Critical Parameters and Best Practices

• Ensure correct dimensional fit according to provided tolerances for PCB mounting.
• Choose switch models based on required electrical ratings and environmental resistance.
• Utilize silver contact points for durability and reliability.
• Consider customization options for push rods and terminals to optimize switch performance.
• Use high flame-retardant materials to enhance safety and longevity.