The **KWMS2-1D-R** is a specific electronic component typically categorized as a **Surface Mount (SMD) Tactile Switch**. These components are widely used in consumer electronics, automotive interfaces, and industrial controls to provide physical feedback to a user. --- ### 1. Technical Specifications Below are the general technical parameters associated with this series of tactile switches: | Feature | Specification (Typical) | | :--- | :--- | | **Type** | Tactile Switch (Momentary) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Actuator Style** | Round Button / Rectangular Body | | **Contact Rating** | 50mA @ 12V DC | | **Operating Force** | 160gf to 250gf (Common range) | | **Travel** | 0.25mm ± 0.1mm | | **Lifespan** | 50,000 to 100,000 cycles | | **Terminal Finish** | Silver or Gold plated | --- ### 2. Breakdown of the Part Number While nomenclature varies slightly by manufacturer (often associated with brands like **KLS** or **Kingbright** in specific contexts), the code usually breaks down as follows: * **KWMS2**: Indicates the series or physical dimensions (often a small form factor like 3x4mm or 4x4mm). * **1D**: Refers to the height of the actuator (stem). In this case, it usually signifies a specific height (e.g., 1.5mm or 2.5mm). * **R**: Generally stands for **Tape & Reel** packaging, indicating the part is intended for automated "pick and place" assembly lines. --- ### 3. Key Electronic Characteristics #### A. Momentary Action The circuit is **Normally Open (NO)**. The electrical connection is only made while the button is physically depressed. Once released, the internal spring mechanism breaks the connection. #### B. Contact Resistance These switches are designed for low-power signal switching. They typically feature a contact resistance of **< 100mΩ**, ensuring minimal signal loss when the switch is engaged. #### C. Environmental Resistance The "R" suffix or specific sub-series often implies a level of heat resistance allowing the part to withstand **Reflow Soldering** temperatures (up to 260°C). --- ### 4. Application Examples * **Consumer Electronics:** Power buttons on Bluetooth speakers, volume rockers on tablets. * **Home Automation:** Reset buttons on smart plugs or UI buttons on thermostats. * **Peripherals:** Function keys on specialized keyboards or mouse side-buttons.