The **ACTA-114-R** is a specific electronic component, typically categorized as a **Surface Mount (SMT) Tactile Switch**. These components are widely used in consumer electronics, automotive interfaces, and industrial controls to provide physical feedback to the user. --- ### 1. Technical Specifications The "ACTA" series generally refers to ultra-miniature or standard tactile switches. Below are the typical technical parameters for this specific part: | Parameter | Specification | | :--- | :--- | | **Type** | Tactile Switch (Push Button) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Circuit** | SPST-NO (Single Pole Single Throw - Normally Open) | | **Actuator Height** | Approximately 1.5mm to 2.5mm (varies by sub-series) | | **Operating Force** | 160gf to 260gf (Grams-force) | | **Contact Rating** | 50mA @ 12V DC | | **Operating Life** | 100,000 to 500,000 cycles | --- ### 2. Key Internal Components The ACTA-114-R is composed of several high-precision parts that work together to create the "click" sensation: * **Actuator (Button):** The top part that the user presses. It is usually made of heat-resistant plastic (like LCP) to withstand SMT reflow soldering. * **Contact Dome:** A stainless steel or copper alloy disc. This is the "heart" of the switch; it provides the tactile snap-back and completes the electrical circuit. * **Base (Housing):** An insulating plastic base that holds the terminals. * **Terminals:** Silver-plated or gold-plated leads that are soldered onto the PCB. --- ### 3. Footprint and Layout For PCB designers, the ACTA-114-R requires a specific landing pattern. Because it is an **"R"** variant (often denoting Tape & Reel packaging or a specific right-angle/side-actuated orientation), the footprint is critical. ```c // Example of a typical Tactile Switch Pin Configuration // 1 ------- 2 (Pins 1 and 2 are usually connected internally) // | // [DOM] (The dome closes the gap when pressed) // | // 3 ------- 4 (Pins 3 and 4 are usually connected internally) ``` --- ### 4. Common Applications * **Consumer Electronics:** Volume buttons on smartphones, power buttons on tablets. * **Automotive:** Steering wheel controls, dashboard buttons. * **Wearables:** Smartwatches and fitness trackers due to the small SMT footprint. * **Industrial:** Reset switches on embedded system boards. --- ### 5. Selection Considerations When replacing or designing with the ACTA-114-R, keep the following in mind: 1. **Travel Distance:** The physical distance the button moves before the circuit closes. 2. **Tactile Feel:** Whether the "click" is sharp or soft (determined by the dome shape). 3. **Environmental Sealing:** Standard models are not waterproof; look for IP67-rated versions if the device will be exposed to moisture.