The **0YK-366-R** is a specific electronic component belonging to the **Tactile Switch** family. It is a momentary pushbutton switch designed for low-power signal switching in consumer electronics and industrial controls. ### 1. Technical Specifications The following table highlights the primary electrical and mechanical characteristics of the 0YK-366-R: | Feature | Specification | | :--- | :--- | | **Component Type** | Tactile Switch (Momentary) | | **Circuitry** | SPST-NO (Single Pole Single Throw - Normally Open) | | **Voltage Rating** | 12V DC (Typical) | | **Current Rating** | 50mA | | **Mounting Style** | Through-hole (THT) | | **Actuation Force** | ~160gf to 250gf (Commonly 160gf) | | **Dimensions** | 6mm x 6mm (Base) | | **Plunger Height** | 5mm (Standard for the -366 series) | --- ### 2. Physical Construction The 0YK-366-R is built with several key materials to ensure tactile feedback and durability: * **Actuator (Button):** Usually made of hard plastic (black or colored), this is the part the user presses. * **Cover:** Metal plate that secures the internal mechanism. * **Contact Dome:** A stainless steel or phosphor bronze dome that provides the "click" sound and completes the electrical circuit when compressed. * **Terminals:** Four pins (usually grouped in pairs) for PCB mounting. Two pins are electrically connected to provide mechanical stability. * **Base:** Heat-resistant molded resin. --- ### 3. Key Features and Applications The "R" suffix in the part number often denotes **RoHS compliance** (Restriction of Hazardous Substances), meaning it is manufactured without lead or other toxic materials. #### Common Applications: * **Consumer Electronics:** Volume buttons, power switches on appliances, and remote controls. * **Computer Peripherals:** Reset buttons on motherboards or function keys on keyboards. * **Industrial:** Interface panels for CNC machines or diagnostic tools. * **Prototyping:** Widely used in Arduino/Raspberry Pi projects due to its breadboard-friendly pin spacing. --- ### 4. Typical Footprint (6x6mm) ```text Top View +-----------+ | ( O ) | <-- Actuator | | +-----------+ | | | | <-- 4 Terminals ```