The **RTS-422-R** is a specific electronic component typically categorized as a **Surface Mount (SMT) Tactile Switch**. These switches are widely used in consumer electronics, automotive interfaces, and industrial controls due to their compact footprint and reliable feedback. --- ## 1. Technical Specifications The electrical and mechanical characteristics of the RTS-422-R are summarized in the table below: | Feature | Specification | | :--- | :--- | | **Switch Type** | Tactile (Momentary) | | **Mounting Type** | Surface Mount Device (SMD/SMT) | | **Actuation Force** | Typically 160gf to 250gf | | **Contact Rating** | 50mA @ 12V DC | | **Dielectric Strength** | 250V AC for 1 minute | | **Operating Life** | 50,000 to 100,000 cycles | | **Travel Distance** | 0.25mm ± 0.1mm | --- ## 2. Key Internal Components The RTS-422-R consists of several integrated parts that allow it to function as a bridge in an electrical circuit: 1. **Actuator (Stem):** The physical button part that the user presses. In the "R" variant, this is often a low-profile or standard height plastic stem. 2. **Contact Dome:** A snap-action metal disc (usually stainless steel). When pressed, it collapses to provide tactile "click" feedback and completes the circuit. 3. **Base/Housing:** High-temperature thermoplastic (LCP or Nylon) designed to withstand IR reflow soldering temperatures. 4. **Terminals:** Silver-plated or gold-plated brass leads that interface with the PCB traces. --- ## 3. Circuit Configuration Most RTS series tactile switches follow a **SPST-NO** (Single Pole Single Throw - Normally Open) logic. ```javascript // Schematic Representation (Terminal A) ----\ ---- (Terminal B) [Switch] // When pressed, Terminal A and B are shorted. ``` --- ## 4. Application Use-Cases * **User Interfaces:** Reset buttons on routers, volume controls on handheld devices. * **Peripheral Input:** Mouse buttons or keyboard function keys. * **Industrial:** Calibration buttons on sensor modules.