The **WADS-151B-R** is a specific electronic component, typically categorized as a **Micro-Switch** or **Detector Switch**. It is widely used in consumer electronics, automotive interiors, and industrial control panels to detect physical presence or mechanical movement. --- ### 1. Technical Specifications The following table highlights the core electrical and mechanical characteristics of the WADS-151B-R: | Feature | Specification | | :--- | :--- | | **Component Type** | Detector Switch / Micro-Switch | | **Circuitry** | SPST-NO (Single Pole Single Throw - Normally Open) | | **Current Rating** | Typically 1mA to 100mA | | **Voltage Rating** | 5V to 12V DC | | **Operating Force** | Low (approx. 0.3N to 1.0N) | | **Mounting Type** | Surface Mount (SMD) / Right Angle | | **Orientation** | Side-actuated (Horizontal) | --- ### 2. Key Electronic Parts & Construction The internal structure of the WADS-151B-R consists of several critical sub-components that ensure its functionality: * **Actuator (Lever/Button):** The physical part that receives external mechanical pressure. In the "B-R" variant, this is often a small plastic lever or plunger designed for side-entry activation. * **Contact Terminal:** Usually made of a copper alloy with **Silver or Gold plating**. Gold plating is preferred for low-current (dry circuit) applications to prevent oxidation. * **Moving Blade/Spring:** A high-precision metallic leaf spring that snaps the contact into place when the actuator is pressed, providing tactile feedback and electrical continuity. * **Housing/Base:** Constructed from high-temperature resistant thermoplastic (like LCP - Liquid Crystal Polymer) to withstand **Reflow Soldering** temperatures. --- ### 3. Application Use Cases Due to its small footprint and reliability, this part is commonly found in: 1. **Optical Drives:** Detecting the position of the disc tray. 2. **Smart Home Devices:** Tamper detection or lid-closure sensing. 3. **Automotive:** Detecting if a seatbelt is buckled or a glovebox is closed. 4. **Handheld Electronics:** Power buttons or mode-selection switches. --- ### 4. Circuit Diagram Representation In a schematic, the WADS-151B-R is represented as a simple momentary switch: ```text [ Terminal 1 ] ----/ ---- [ Terminal 2 ] (Switch) ```