The **M8TS-044-R/SK** is a high-precision, low-profile tactile switch manufactured by **Mitsumi** (now Minebeamitsumi). These components are widely used in consumer electronics, automotive interfaces, and mobile devices where space is limited but tactile feedback is required. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Type** | Tactile Switch (Momentary) | | **Mounting Type** | Surface Mount (SMT/SMD) | | **Circuit** | SPST-NO (Single Pole Single Throw - Normally Open) | | **Operating Force** | Typically 1.6N to 2.4N (model dependent) | | **Travel** | Short travel (approx. 0.15mm to 0.25mm) | | **Electrical Rating** | 50mA, 12V DC (typical) | | **Contact Resistance** | < 100mΩ | | **Durability** | 100,000 to 500,000 cycles | --- ### 2. Physical Design and Features * **Low Profile:** The "M8TS" series is characterized by an ultra-thin design, making it ideal for compact PCB layouts. * **Sealed Structure:** The "SK" designation often refers to the specific sealing or stem height variant. These switches are often designed to be dust-resistant to ensure long-term reliability. * **Tactile Feedback:** Despite its small size, the switch provides a distinct "click" sensation, informing the user that the contact has been successfully made. * **Materials:** * **Base:** Heat-resistant resin (to withstand SMT reflow soldering). * **Contact:** Stainless steel or copper alloy with silver plating for high conductivity. --- ### 3. Application Use-Cases The M8TS-044-R/SK is commonly found in: 1. **Mobile Phones:** Volume buttons and power buttons. 2. **Wearables:** Smartwatches and fitness trackers. 3. **Automotive:** Key fobs and steering wheel controls. 4. **Medical Devices:** Handheld diagnostic equipment. --- ### 4. Typical Footprint and Soldering ```c // Note: This is a representation of a standard 2-pin SMT pad layout // for a small tactile switch like the M8TS series. [Pad 1] ---- (Switch) ---- [Pad 2] // Soldering Note: // Recommended Reflow Profile: Lead-free (Pb-free) 260°C Peak ``` ---