## Overview of W2PA-5CD-R2/N The **W2PA-5CD-R2/N** 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 tactile feedback to the user when a button is pressed. --- ### Key Technical Specifications The following table outlines the core electrical and physical characteristics of this component series: | Property | Specification (Typical) | | :--- | :--- | | **Type** | Tactile Switch (Push Button) | | **Mounting Style** | Surface Mount Device (SMD/SMT) | | **Circuit Configuration** | SPST (Single Pole Single Throw) | | **Operating Force** | 1.6N to 2.5N (Model dependent) | | **Travel** | 0.25mm - 0.3mm | | **Contact Resistance** | < 100 mΩ | | **Life Cycle** | 100,000 to 500,000 cycles | | **Termination** | Gull-wing or J-lead | --- ### Component Composition 1. **The Actuator:** The top part that the user presses. In the "5CD" variant, this is usually a plastic stem or a metal dome interface designed for high durability. 2. **The Dome Contact:** A snap-action metal disc that provides the "click" feeling and completes the electrical circuit when compressed. 3. **The Housing:** Usually made of high-temperature resistant thermoplastic (LCP or Nylon) to withstand the **Reflow Soldering** process. 4. **Terminals:** Silver or gold-plated copper alloy leads that connect the switch to the Printed Circuit Board (PCB). --- ### Applications The W2PA-5CD-R2/N is commonly found in: * **Consumer Electronics:** Volume buttons on smartphones, power buttons on tablets. * **Automotive:** Dashboard controls, steering wheel buttons, and key fobs. * **Wearables:** Smartwatches and fitness trackers due to its small footprint. * **Industrial:** Interface panels for diagnostic equipment. --- ### Part Number Breakdown (General Convention) While specific to the manufacturer's catalog (often associated with brands like **Walsin** or similar specialized switch manufacturers), the code typically breaks down as follows: * **W2PA:** Series designation (Tactile switch family). * **5CD:** Dimensions/Height code (e.g., 5.2mm x 5.2mm base). * **R2:** Packaging specification (typically Tape & Reel for automated assembly). * **N:** Lead-free / RoHS compliance indicator.