The **C4SMD-RGF** is a high-brightness, through-hole Red Light Emitting Diode (LED) manufactured by **Cree LED** (formerly Wolfspeed/Cree). It is specifically designed for outdoor video screens and digital signage. --- ## 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Color** | Red | | **Wavelength** | 619 nm - 624 nm | | **Luminous Intensity** | 1100 - 4180 mcd | | **Viewing Angle** | 70° (Horizontal) / 35° (Vertical) | | **Lens Shape** | Oval (4mm) | | **Forward Current ($I_F$)** | 50 mA (Maximum) | | **Forward Voltage ($V_F$)** | 2.1V (Typical) | | **Lens Appearance** | Red Diffused | --- ## 2. Electronic Characteristics ### Power Dissipation and Thermal Management The device is built using **AlInGaP** (Aluminium Indium Gallium Phosphide) technology. This material allows for high efficiency and high-intensity output at relatively low currents. * **Reverse Voltage:** 5V (Maximum). Applying a reverse bias beyond this can damage the PN junction. * **Operating Temperature:** -40°C to +100°C, making it resilient for extreme weather conditions. ### Optical Precision The "Oval" shape of the lens is a critical electronic/mechanical design feature. It provides a wide horizontal viewing angle (70°) while maintaining a narrower vertical angle (35°). This ensures that light is directed toward the audience on the ground rather than being wasted by pointing toward the sky. --- ## 3. Physical Footprint and Design The C4SMD series utilizes a traditional through-hole package with standardized lead spacing. ```markdown Structure: - Anode: Longer Lead - Cathode: Shorter Lead (Flat side on the base of the LED) - Material: UV resistant epoxy to prevent yellowing in sunlight. ``` --- ## 4. Typical Applications * **Full-Color Outdoor Video Screens:** Used as the red sub-pixel component. * **Variable Message Signs (VMS):** Highway traffic alerts. * **Petrol Station Price Signs:** High-visibility outdoor displays. * **Amusement Park Displays:** Dynamic lighting in outdoor environments. ---