The **M8TS-166-R** is a specific surface-mount technology (SMT) component, typically categorized as a **tactile switch** (often associated with manufacturers like Mitsumi or similar specialized switch producers). Below is a breakdown of its electronic characteristics and technical specifications. --- ### 1. General Specifications The M8TS series is designed for compact consumer electronics where a low profile and high reliability are required. | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Tactile Switch (Push Button) | | **Mounting Type** | Surface Mount (SMT/SMD) | | **Circuit Type** | SPST (Single Pole Single Throw) | | **Operation Type** | Momentary (Normally Open) | | **Contact Rating** | 12V DC, 50mA | | **Operating Force** | ~1.6N (160gf) | | **Travel Distance** | 0.25mm - 0.3mm | --- ### 2. Key Electronic Characteristics #### A. Contact Resistance The internal contacts are usually gold or silver-plated to ensure low resistance. For the M8TS-166-R: * **Initial Resistance:** Usually less than 100mΩ. * **Insulation Resistance:** Minimum of 100MΩ at 100V DC. #### B. Durability (Life Cycle) This part is rated for high-frequency use. * **Mechanical Life:** Often rated for 100,000 to 500,000 cycles depending on the specific sub-variant. * **Bounce Time:** Typically less than 5ms (important for software debouncing in microcontroller programming). #### C. Environmental Limits * **Operating Temperature:** -20°C to +70°C. * **Soldering:** Designed to withstand Lead-Free Reflow soldering temperatures (Peak ~260°C). --- ### 3. Physical Footprint and Design The "R" in the suffix usually denotes **Tape & Reel** packaging for automated pick-and-place assembly lines. * **Actuator:** The "166" code often relates to the height of the stem or the operating force (1.6mm height or 160g force). * **Terminals:** Typically features 4 pins (two pairs of internally connected pins) to provide mechanical stability on the PCB. --- ### 4. Common Applications Due to its small form factor and tactile feedback, it is commonly found in: 1. **Consumer Electronics:** Volume buttons on smartphones or tablets. 2. **Wearables:** Function buttons on smartwatches. 3. **Medical Devices:** Interface buttons for handheld diagnostic tools. 4. **Automotive:** Steering wheel controls or dashboard interfaces.