The **KMMLS-AA2-R** refers to a specific series of tactile micro-switches, commonly manufactured by **C&K** (now part of Littelfuse). These components are widely used in consumer electronics for user interface buttons. --- ### 1. Component Overview The KMMLS series is characterized by its **ultra-miniature** footprint and **side-actuated** design. This allows the switch to be mounted on a PCB while being pressed from the side, which is ideal for thin devices like smartphones, wearables, and remote controls. ### 2. Technical Specifications Below are the primary electrical and mechanical characteristics for this specific part: | Feature | Specification | | :--- | :--- | | **Switch Type** | Tactile Switch (Momentary) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Actuation Direction** | Right Angle (Side Actuated) | | **Operating Force** | Typically 1.6 N (160 grams) | | **Contact Rating** | 1.0 VA max @ 32 VDC max | | **Contact Resistance** | < 100 mΩ | | **Operating Life** | 100,000 cycles | | **Operating Temp** | -40°C to +85°C | --- ### 3. Key Features * **Small Footprint:** Designed to save board space in high-density layouts. * **G-Termination:** Usually features "G" type SMT leads for secure soldering to the board surface. * **Pick and Place Compatible:** Supplied in Tape & Reel packaging (indicated by the **-R** suffix) for automated assembly lines. * **Tactile Feedback:** Provides a distinct "click" sensation to the user upon actuation. ### 4. Part Number Breakdown While specific manufacturer codes vary slightly, the nomenclature generally follows this pattern: 1. **KMM:** Series identifier (Miniature Side Actuated Tactile). 2. **LS:** Low profile/Standard height variant. 3. **AA2:** Actuator force or height specification (Specific to the 160gf range). 4. **R:** Packaging code (Tape & Reel). --- ### 5. Application Examples * **Mobile Devices:** Volume rockers or power buttons. * **Medical Equipment:** Small handheld diagnostic tools. * **IoT Sensors:** Reset buttons or user input triggers. * **Automotive:** Interior control panels or key fobs.