The **BY211U2CWCMG22** is a specific part number typically associated with **Surface Mount (SMD) Light Emitting Diodes (LEDs)**. Based on the nomenclature often used by manufacturers like Everlight or similar Optoelectronics firms, here is a breakdown of its technical characteristics. ### 1. General Specifications This component is a high-brightness LED designed for surface mount technology (SMT) assembly. | Feature | Specification | | :--- | :--- | | **Component Type** | SMD LED | | **Color** | Cool White (CW) | | **Package Size** | 211 (often refers to a specific metric or manufacturer-specific footprint) | | **Lens Type** | Water Clear / Transparent | | **Mounting Type** | Surface Mount (SMT) | --- ### 2. Key Electronic Parameters While exact values can vary slightly by batch, the following are the standard operating parameters for this class of white LEDs: #### A. Electrical Characteristics * **Forward Voltage ($V_f$):** Typically ranges between **2.8V to 3.6V**. * **Forward Current ($I_f$):** Standard operating current is usually **20mA**, though it may support pulses up to 100mA depending on the thermal management. * **Reverse Voltage ($V_r$):** Usually rated at a maximum of **5V**. #### B. Optical Characteristics * **Color Temperature:** Being "Cool White," it typically falls between **5000K and 7000K**. * **Luminous Intensity:** High efficiency, measured in millicandela (mcd) or lumens (lm) depending on the specific binning. * **Viewing Angle:** Usually wide, often around **120°**, making it ideal for backlighting. --- ### 3. Pinout and Construction The device consists of a Gallium Nitride (GaN) or Indium Gallium Nitride (InGaN) chip coated with a yellow phosphor to produce white light. 1. **Anode (+):** The positive terminal. 2. **Cathode (-):** The negative terminal, usually marked with a notch or a green stripe on the body of the SMD package. 3. **Encapsulation:** Silicone or Epoxy resin (Clear). --- ### 4. Common Applications Due to its small form factor and "Cool White" output, this part is commonly used in: * **Backlighting:** For LCD screens, switches, and symbols. * **Indicators:** Status lights on consumer electronics (Routers, Laptops). * **Automotive:** Interior lighting and dashboard illumination. * **General Illumination:** Small-scale LED strips and decorative lighting. ---