Tact Switch

Tact Switches offer important and useful features that can enhance the user perception of a product. First, they provide momentary circuit engagement – the current is on when the switch is pushed and is off when the switch is released, or vice versa. This allows for faster data input, as in a computer keyboard, and continuous operation until necessary, as in a motor control keypad.

Second, and most important, tact switches offer tactile and auditory feedback to the operator, confirming that the switch is engaged and power is flowing to the circuit. They also, as in the case of computer keyboards, provide a fulfilling physical “feel” to the function of typing that can also indicate missed strokes, or lack of input.

Third, tact switches typically operate at lower power and current ratings. This makes them less costly to produce and better matched to low voltage devices and systems. The lower voltage also means less arcing at contact points.

Finally, with very few moving parts, tact switches typically last longer than other mechanical switches. This allows for their use directly mounted on circuit boards, with less worry about removal for repair. It also means that, in comparison to other switch types, they cost less to use in a product.