The **KWADS-151B-R** is a specific electronic component, typically categorized as a **Surface Mount Device (SMD) Tactile Switch**. These components are widely used in consumer electronics, automotive controls, and industrial interfaces to provide a physical "click" feedback when a button is pressed. --- ### Technical Specifications The following table outlines the typical electrical and physical characteristics of this part series: | Parameter | Specification | | :--- | :--- | | **Switch Type** | Tactile Switch (Momentary) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Actuator Style** | Round Button / Stem | | **Operating Force** | 160gf to 250gf (varies by sub-model) | | **Contact Rating** | 50mA @ 12V DC | | **Contact Resistance** | 100 mΩ Max | | **Insulation Resistance** | 100 MΩ Min @ 100V DC | | **Operating Life** | 100,000 to 500,000 cycles | --- ### Component Composition The internal structure of the KWADS-151B-R consists of several key electronic and mechanical parts: 1. **Contact Dome (The Heart):** A stainless steel or copper alloy disc that provides the tactile snap and completes the circuit when depressed. 2. **Cover:** Usually a metal plate that holds the internal components in place and provides structural integrity. 3. **Actuator (Stem):** The plastic part that the user presses. In the "151" series, this is usually a low-profile or standard height stem. 4. **Base (Housing):** Made of heat-resistant thermoplastic (LCP or Nylon) to withstand the high temperatures of reflow soldering. 5. **Terminals:** Silver-plated or gold-plated leads that interface with the Printed Circuit Board (PCB). --- ### Application Use Cases Because of its small footprint and reliability, this part is commonly found in: * **Mobile Devices:** Volume or power buttons. * **Wearables:** Smartwatches and fitness trackers. * **Peripherals:** Computer mice and keypads. * **Automotive:** Dashboard controls and key fobs. --- ### Dimensions and Footprint While specific datasheets should be consulted for PCB layout, the "KWADS" series generally follows a standard footprint: ```text Approximate Size: 3.5mm x 3.0mm (Small Form Factor) Orientation: Right Angle or Vertical (R suffix often denotes Right Angle) ```