Dual-Action Two-Step Tact Switch Selection

A dual-action tact switch, also called a two-step or two-stage switch, is one push button that reports two stages: a light half-press closes the first contact, and a firmer full-press closes the second, like a camera shutter. It is one physical button, not a dual-button assembly and not a timer, and the two stages must be distinguishable by the controller, with a distinct force step between them that the finger reads as a layered click. A common implementation assigns one input to each stage, but the exact interface depends on the contact arrangement and the circuit diagram. Swiclick builds dual-action tact switches, including the KAN6233 two-stage type, with a 500-piece minimum and free samples. Send your two-stage force targets and we will confirm the part.

One Button, Two Stages

The defining feature is staging in a single actuator. A light press closes the first stage, and pressing further past a defined force step closes the second stage. This is what makes it feel like a camera shutter, where a half-press focuses and a full-press captures. It is not two buttons wired together and it is not a microcontroller timing one press, it is one physical actuator with two mechanically sequenced switching stages, so that press force selects the stage. The exact sequencing, including whether the first stage stays closed at full press, is set by the contact design and must be read from the datasheet.

Wiring Both Stages

A common implementation reads the two contact stages separately, often with one controller input assigned to each stage. Read the first-stage contact for the light press and the second-stage contact for the full press. The exact terminal arrangement and common-contact structure vary by part, so confirm the pin layout and contact assignment from the KAN6233 circuit diagram before defining the PCB connection or firmware logic.

Where a Two-Step Switch Fits

The best-known application is a camera shutter, where the first stage initiates focus or metering and the second stage releases the shutter. The same two-stage interface can also be used where a design requires two distinct commands from one mechanically linked actuator, which is clearer than two separate buttons.

Force Steps and the Layered Feel

The experience depends on the force difference between the two stages. Too small a step and the user cannot tell the stages apart, too large and the full press feels stiff. The right window gives a clear first detent and a definite second one. Match the two-stage force profile to the interface and the user, and confirm the stage forces on the datasheet, since the layered feel is set by that profile rather than by the electrical rating.

Confirming a Dual-Action Tact

Swiclick is the switch brand of Wenzhou Gangyuan Electronics Co., Ltd. Send the two-stage force targets, the feel you want between stages, and how the two outputs map to your controller, and we will confirm the closest two-step tact part and the contact assignment for both stages.

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