The **W2AP-D2Y-R/UL** is a specialized electronic component, specifically a **high-reliability illuminated push-button switch** or indicator (depending on the specific mounting configuration) manufactured by **IDEC** (though often associated with specific industrial panel series). Below is the technical breakdown of its electronic parts and specifications. --- ### 1. Technical Specifications The part number follows a specific nomenclature used in industrial control components. | Feature | Specification | | :--- | :--- | | **Product Category** | Miniature Control Unit / Pilot Light | | **Mounting Hole Size** | 8mm (Typical for W series) | | **Input Voltage** | 24V DC (Standard for "D2" designation) | | **Illumination Type** | LED (High-brightness) | | **Color** | Red (Indicated by "R") | | **Certification** | UL Recognized (indicated by "UL") | --- ### 2. Key Electronic Components #### A. Internal LED Module The core of the unit is a surface-mount or integrated LED. * **Voltage Regulation:** The "D2" code indicates a 24V DC rating. Internally, the part contains a **current-limiting resistor** to prevent the LED from burning out when connected directly to an industrial power supply. * **Polarity:** Being a DC component, it has specific anode (+) and cathode (-) terminals, usually marked on the side of the housing. #### B. Termination (Connections) The "Y" in the part number often refers to the **Solder/Tab terminals**. * **Material:** Usually silver-plated or gold-plated brass for high conductivity and oxidation resistance. * **Safety:** The terminals are spaced to prevent arcing and are often compatible with quick-connect female crimp connectors. #### C. Optical Lens System The "R" suffix stands for **Red**. * **Material:** Polycarbonate or Acrylic. * **Diffuser:** The lens is designed with internal ribbing or frosting to ensure the light is evenly distributed across the face of the button, preventing "hot spots" from the internal LED. --- ### 3. Application and Usage This part is commonly found in: 1. **Industrial Control Panels:** As a status indicator (Power ON, Fault, etc.). 2. **Medical Equipment:** Due to its small 8mm footprint and UL safety rating. 3. **Test Instruments:** Used where space is limited but high-visibility signaling is required. --- ### 4. Circuit Diagram Representation When drawing this in a schematic, it is represented as a standard LED with an integrated resistor. ```text (+) ---[ Resistor ]---( LED )--- (-) (Built-in) (Red) ```