The **KWMS2-1Z-R** is a specific model of a **Miniature Micro Switch** (also known as a snap-action switch). These switches are widely used in household appliances, industrial controls, and automotive electronics due to their high reliability and rapid switching speed. --- ### 1. Technical Specifications The following table summarizes the key electronic and physical characteristics of the KWMS2-1Z-R: | Feature | Specification | | :--- | :--- | | **Switch Type** | Miniature Snap Action / Micro Switch | | **Contact Form** | SPDT (Single Pole Double Throw) | | **Current Rating** | Typically 3A to 5A (depending on voltage) | | **Voltage Rating** | 125V AC / 250V AC | | **Terminal Type** | PCB Terminals (Right-angle or Straight) | | **Actuator Type** | Simulated Roller Lever / Small Lever | | **Operating Force** | Light (approx. 50gf - 150gf) | | **Mechanical Life** | > 1,000,000 cycles | --- ### 2. Breakdown of the Model Name While naming conventions can vary slightly by manufacturer (such as Dongnan or Kailh), the code generally breaks down as follows: * **KWMS:** Series designation (Miniature Micro Switch). * **2:** Size or current rating indicator (often signifies the "Small/Sub-miniature" series). * **1Z:** Refers to the contact arrangement (**1** pole, **Z** representing Changeover/SPDT). * **R:** Usually indicates the **Actuator Type** (Roller lever or Right-angle mounting). --- ### 3. Contact Configuration (SPDT) The "1Z" designation means the switch has three pins. Below is the logic of how it functions electronically: ```mermaid graph LR COM[Common Pin] --- NC[Normally Closed] style NC stroke-dasharray: 5 5 COM -.-> NO[Normally Open] ``` 1. **COM (Common):** The input power/signal. 2. **NC (Normally Closed):** Connected to COM when the switch is at rest. 3. **NO (Normally Open):** Connected to COM only when the lever is pressed. --- ### 4. Common Applications Because of its small footprint and precise actuation, this part is frequently found in: * **Computer Mice:** For left/right click functions. * **Home Appliances:** Microwave door interlocks or blender safety switches. * **3D Printers:** Used as "End-stops" to detect the limit of the X, Y, or Z axis. * **Smart Locks:** To detect the position of the deadbolt. ---