Weipeng Home Appliance Smart Door Lock Three-Leg Waterproof Micro Switch

The core competitiveness of the FSK-18 lies in its "perfect balance of miniaturization and waterproofing," using a patented sealing structure design: high-elasticity nitrile rubber sealing rings are embedded at the shell joints, combined with an overall potting process to fill internal gaps, completely blocking the intrusion paths of water vapor and dust. The protection level reaches IP67, capable of withstanding 30 minutes of immersion at a depth of 1 meter, ensuring stable operation in environments such as bathrooms, outdoor rain, and humid industrial workshops.

The shell is made of flame-retardant PA66 reinforced nylon, treated with high-temperature modification, providing both flame resistance (UL94 V-0) and anti-aging performance. The operating temperature range covers -25℃ to 85℃, capable of withstanding high and low temperature cycling impacts, preventing material cracking or performance degradation in extreme environments. The contact system uses highly wear-resistant silver alloy material, optimized with a vacuum plating process. The initial contact resistance is ≤50mΩ, insulation resistance is ≥100MΩ (500VDC), and the terminal withstand voltage reaches 1500V AC, effectively preventing leakage and contact oxidation in humid environments.

Rated parameters offer multiple configurations: AC scenarios support 0.5A/250V AC and 5A/125V AC, while DC scenarios cover levels such as 0.1A/48V DC and 3A/12V DC, allowing direct driving of small relays and miniature motors without additional intermediate components, simplifying circuit design. Terminal types support flexible customization, including 1.3×0.5mm PCB terminals, 3.2×0.5mm solder terminals, and lead terminals, suitable for PCB mounting and on-site wiring needs. Additionally, it supports basic 2-pin and 3-pin configurations, meeting functional requirements such as normally open (NO), normally closed (NC), and single-pole double-throw (SPDT).

Suitable for appliances in humid environments such as microwaves, dishwashers, and humidifiers, it can be used as a function control or water level detection switch. With IP67 protection, it can resist water vapor corrosion. After being applied by a well-known appliance brand, related after-sales repair rates dropped by 50%, and equipment operational stability significantly improved.