The **CLM4B-RKC-CWBXAAA3** is a high-performance Surface Mount Device (SMD) Light Emitting Diode (LED) manufactured by **Cree LED** (formerly Wolfspeed/Cree). It belongs to the **CLM4B series**, which is specifically designed to operate under a wide range of environmental conditions. --- ### ## 1. Technical Specifications The following table highlights the core electrical and optical characteristics of this specific part number. | Parameter | Specification | | :--- | :--- | | **Color** | Red | | **Dominant Wavelength** | 619nm - 624nm | | **Luminous Intensity** | 710mcd - 2240mcd | | **Forward Current ($I_F$)** | 50 mA | | **Forward Voltage ($V_F$)** | 2.5V (Typical) / 3.0V (Max) | | **Viewing Angle** | 120 Degrees | | **Package Type** | PLCC4 (3.2 x 2.7 mm) | | **Operating Temperature** | -40°C to +100°C | --- ### ## 2. Part Number Breakdown The nomenclature of this part provides specific details about its binning and packaging: * **CLM4B**: The series name (PLCC4 SMD LED). * **RKC**: Color designation (**R**ed, AlInGaP technology). * **CWBXAAA3**: This suffix refers to the specific brightness (luminous intensity) and wavelength bins assigned to this product, as well as the reel/packaging specifications. --- ### ## 3. Key Electronic Features * **AlInGaP Technology:** The LED uses Aluminum Indium Gallium Phosphide material, which ensures high luminous efficiency and long-term reliability. * **PLCC4 Package:** The 4-pin PLCC (Plastic Leaded Chip Carrier) design provides better thermal management than standard 2-pin PLCC2 packages, allowing it to be driven at higher currents (50mA vs the standard 20mA). * **Wide Viewing Angle:** The 120-degree radiation pattern makes it ideal for backlighting and signage, ensuring uniform light distribution. * **Encapsulation:** It is typically encapsulated in a clear, water-resistant epoxy, making it suitable for outdoor applications. --- ### ## 4. Common Applications Due to its robustness and brightness, this part is frequently used in: 1. **Automotive:** Dashboard illumination, stop lights, and turn signals. 2. **Signage:** Full-color video screens and advertising displays. 3. **Industrial:** Status indicators and channel letters. 4. **Backlighting:** LCD displays and control panel buttons. ---