The **17TS-55-R/BL** refers to a high-performance **Tactile Switch** (also known as a momentary push-button switch). These components are widely used in consumer electronics, automotive interfaces, and industrial controls to provide physical feedback to the user. --- ### ## Technical Specifications Below are the typical technical parameters for the 17TS series tactile switches: | Parameter | Specification | | :--- | :--- | | **Type** | Momentary Tactile Switch | | **Actuation Force** | Typically 160gf to 250gf (Gram-force) | | **Dimensions** | 12mm x 12mm (Standard footprint) | | **Mounting Type** | Through-hole (DIP) or Surface Mount (SMD) | | **Contact Rating** | 50mA @ 12V DC | | **Travel Distance** | 0.25mm ± 0.1mm | | **Life Expectancy** | 100,000 to 1,000,000 cycles | | **Operating Temp** | -25°C to +70°C | --- ### ### Key Components and Construction The switch is comprised of four primary internal parts that define its functionality: 1. **Actuator (The Button):** The part the user presses. In the "R/BL" variant, this is often a round (R) plunger with a specific color (Blue/BL). 2. **Contact Dome:** A snap-action metal disc. When pressed, it collapses to complete the circuit and provides the "click" sound and tactile feel. 3. **Housing/Base:** Usually made of high-temperature thermoplastic (like PBT or Nylon) to withstand soldering heat. 4. **Terminals:** Silver-plated brass or copper pins that connect the switch to the Printed Circuit Board (PCB). --- ### ### Part Number Breakdown (Nomenclature) While naming conventions vary slightly by manufacturer, the code generally follows this logic: * **17TS:** The series identifier (12x12mm square body). * **55:** Refers to the height of the actuator (e.g., 5.5mm). * **R:** Indicates a **Round** actuator shape. * **BL:** Indicates the color **Blue**. --- ### ### Applications These switches are commonly found in: * **Household Appliances:** Microwave control panels, washing machine buttons. * **Peripherals:** Computer monitors, printers, and routers. * **Industrial:** Reset buttons on PLC modules and interface panels.