The **KMMLS-221-R** is a specific model of a **Miniature Slide Switch**. These components are widely used in consumer electronics, instrumentation, and telecommunications for basic power switching or signal routing. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. General Specifications The KMMLS-221-R is characterized by its compact footprint and surface-mount (SMD) compatibility. | Feature | Specification | | :--- | :--- | | **Switch Type** | Slide Switch | | **Circuit Configuration** | DPDT (Double Pole Double Throw) | | **Switch Function** | On-On | | **Mounting Type** | Surface Mount (SMD/SMT), Right Angle | | **Actuator Type** | Side Actuated (Horizontal) | ### 2. Electrical Characteristics These parameters define the limits under which the switch can operate safely and reliably. * **Current Rating:** Typically rated at **300mA** at **6V DC**. * **Contact Resistance:** Generally low (max **70mΩ**), ensuring minimal signal loss. * **Insulation Resistance:** Minimum of **100MΩ** at 500V DC. * **Dielectric Strength:** Capable of withstanding **500V AC** for 1 minute without breakdown. ### 3. Physical & Material Composition The "R" suffix often denotes **RoHS compliance** or specific **Tape & Reel** packaging for automated assembly. | Component | Material | | :--- | :--- | | **Housing** | High-temperature Thermoplastic (LCP or Nylon) | | **Actuator** | Thermoplastic | | **Contacts** | Copper Alloy with Silver or Gold plating | | **Terminals** | Silver-plated brass for high conductivity | ### 4. Common Applications Due to its small size and right-angle orientation, it is frequently found in: * **Wearables:** Power on/off switches for smartwatches or fitness trackers. * **IoT Devices:** Mode selection (e.g., switching between Wi-Fi and Bluetooth modes). * **Audio Equipment:** Selecting input sources or gain levels. * **Testing Equipment:** Small handheld multimeters or signal generators. --- ### 5. Typical Footprint Example In a PCB design environment (like Altium or KiCad), the footprint would look similar to this logic: ```cpp // Pseudo-code representation of the Pin Mapping Pin 1: Pole A (Common) Pin 2: Throw A1 Pin 3: Throw A2 Pin 4: Pole B (Common) Pin 5: Throw B1 Pin 6: Throw B2 // Plus Grounding/Mechanical Support Tabs ```