The **KMMLS-1B2-R** is a specific electronic component typically categorized as a **Micro-Miniature Lever Switch** or a tactile/limit switch, often manufactured by companies like **C&K Components** (now part of Littelfuse). These switches are designed for compact electronic devices where space is at a premium. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and mechanical characteristics of the KMMLS-1B2-R: | Feature | Specification | | :--- | :--- | | **Switch Type** | Micro-Miniature Snap Action / Detect Switch | | **Actuator Type** | Long Lever (Standard) | | **Circuit** | SPDT (Single Pole Double Throw) | | **Switch Function** | On-Mom (Momentary) | | **Current Rating** | Typically 100mA @ 12V DC | | **Operating Force** | Low (approx. 40g to 60g) | | **Mounting Type** | Surface Mount (SMT) / Right Angle | | **Life Cycle** | ~50,000 to 100,000 cycles | --- ### 2. Physical Construction The part is engineered for automated assembly and durability in small enclosures: * **Housing:** High-temperature thermoplastic (LCP) to withstand reflow soldering temperatures. * **Contacts:** Usually silver-plated or gold-plated to ensure low contact resistance and prevent oxidation. * **Terminals:** Designed for "Gull-wing" or "J-lead" SMT soldering to the PCB. * **Lever:** A metal or plastic lever that acts as the physical interface to trigger the internal snap-action mechanism. --- ### 3. Application Use Cases Because of its small footprint and "detect" functionality, the KMMLS-1B2-R is commonly found in: 1. **Consumer Electronics:** Detecting if a battery door is closed or if a memory card (SD/MicroSD) is inserted. 2. **Medical Devices:** Sensing the presence of a cartridge or a protective cap. 3. **Smart Home:** Limit switches in small motorized blinds or security sensors. 4. **Telecommunications:** Detecting the docking status of handheld devices. --- ### 4. Typical Connection Diagram In a standard SPDT configuration, the wiring logic is as follows: ```text [COM] ---- Common Terminal / [NC] [NO] (Closed) (Open) ``` * **NC (Normally Closed):** Connected to COM when the lever is at rest. * **NO (Normally Open):** Connected to COM only when the lever is depressed.