the base material of the pin of the touch switch is brass or phosphor copper (iron for low-grade). in order to reduce the touch resistance, the pins are basically plated with silver, because the silver will oxidize when it meets the so2 gas in the air, which directly affects the switch's performance. solderability and touch resistance, so high-quality tact switches are mainly controlled in terms of the thickness of the base material of the pins and the silver plating skills.
the light touch switch is widely used in household appliances due to its low contact resistance, clear hａnd feeling when pressed, and complete height specifications.