The **MEWT-111W-R** is a specific electronic component, typically categorized as a **Micro-Switch** or **Detection Switch**, often manufactured by companies like Mitsumi. These components are designed for precision sensing in consumer electronics. --- ### 1. General Specifications The MEWT series consists of ultra-miniature detection switches. Below is a breakdown of the typical technical profile for this specific model: | Property | Description | | :--- | :--- | | **Component Type** | Detection / Micro-Switch | | **Circuit Type** | SPST (Single Pole Single Throw) | | **Switch Function** | Normally Open (NO) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Actuator Type** | Lever / Push Pin (Right Angle or Vertical depending on suffix) | | **Operating Force** | Typically low (approx. 0.3N to 0.5N) | --- ### 2. Key Electronic Characteristics These parts are designed for low-power signal switching rather than high-current power management. * **Voltage Rating:** Usually rated for **5V DC to 12V DC**. * **Current Rating:** Low current, typically around **1mA to 10mA**. * **Contact Resistance:** Generally below **100mΩ** to ensure signal integrity. * **Insulation Resistance:** High threshold (e.g., 100MΩ at 100V DC) to prevent leakage. * **Durability:** Rated for thousands of cycles (Mechanical life). --- ### 3. Physical Construction The "R" suffix in the part number often denotes specific packaging or orientation details: * **Housing:** High-temperature thermoplastic (capable of withstanding Reflow Soldering). * **Contacts:** Usually gold or silver-plated to prevent oxidation and ensure reliable switching. * **Terminals:** Lead-free soldering compatible. * **Form Factor:** Ultra-compact, designed for high-density PCB layouts where space is a premium. --- ### 4. Common Applications The MEWT-111W-R is commonly found in devices where the system needs to "detect" a mechanical state: 1. **Optical Disc Drives:** Detecting if a tray is open or closed. 2. **Cameras:** Sensing the position of a lens or the presence of an SD card. 3. **Smartphones/Wearables:** Detecting the attachment of accessories. 4. **Printers:** Paper path detection or cover-open sensing. ---