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Touch switch called key switch, first appeared in Japan [ call : sensitive switch ] when using the force to meet the operating conditions pressure switch function closure is turned on when the pressure switch is disconnected to revoke the operating switch direction its internal structure is changing by metal shrapnel force to achieve on-off .

Tact Switch From: inserts, base , shrapnel , buttons, waterproof cover class composition which touch switch on the shrapnel add a layer of polyimide film ( pictured) .

Tact switch contact resistance load is small, precise operation force error , and other aspects of the advantages of diversification specifications , widely used in electronic equipment and white goods and other aspects such as: audio and video products , digital products , remote control, communications products, household appliances, security products , toys, computer products , fitness equipment , medical equipment, money detector pen , laser pointer button and so on. Because the touch switches on the environment conditions ( stretch / ambient temperature and humidity conditions, and electrical properties of the applied pressure is less than 2 -fold ) and high load large equipment buttons are used conductive rubber dome switch or directly to the place of metal shrapnel , such as medical equipment, TV remote control.

Five questions about the pin foot touch switch : the two pins as a group, the switch body when pressure is applied to the four pins correct phase conduction , the fifth pin to ground effect.

Tact switch has three packages : Bulk artificial plugin , SMT chip package , DIP plug- Tape package. Tact Switch main specifications are: environmental temperature SMD plug- side plug- large / medium / small turtle type Tact Switch Tact Switch 3 2 * 4 * 3 * 3.7 * 3.7 Tact Switch 0.35 goods into touch switch 4 * 4 * 1.5/1.6/17mm touch switch 3 * 6 * 4.3/5.0mm car Tact Switch 4 * 6 * 2.6 4.5 * 4.5 * Tact Switch 3.8/4.8/5/0/6/7/8 / 9 SMD Tact Switch Plug- touch switch sides three solutions Tact Switch 6 * 6 * 4.3/5.0/5.5/6/7/8/9/9.5/10/11/12/13/14/15/16 / 17/18/19/20/21/26mm SMD Tact Switch Tact Switch Tact Switch plugin 2.5/2.7/3.1/3.4 6.2 * 6.2 * 12 * 12 * Tact Switch 4.3/5.0/5.5/6 / 7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23mm Tact Switch 6 * 6 Series waterproof Tact Switch series waterproof light 8 * 8 touch switch 10 * 10 12 * waterproof Tact Switch Tact Switch 12 series waterproof .