The **C4SMM-RJF-CS14QBB1** is a high-performance, high-brightness **Red LED** manufactured by **Cree LED (Wolfspeed)**. It belongs to the **ScreenMaster®** series, specifically designed for outdoor video screens and signage. ### Technical Specifications | Parameter | Specification | | :--- | :--- | | **Color** | Red | | **Wavelength (Typical)** | 621 nm | | **Luminous Intensity** | 770 - 2130 mcd (millicandela) | | **Viewing Angle** | 100° Horizontal / 45° Vertical | | **Package Type** | 4mm Oval (Radial / Through-hole) | | **Forward Current ($I_F$)** | 50 mA (Maximum) | | **Forward Voltage ($V_F$)** | 2.1 V (Typical) | | **Lens Appearance** | Tinted, Diffused | --- ### Key Electronic Features #### 1. Oval Beam Pattern Unlike standard round LEDs, this part features an oval viewing angle. This is electronically and optically engineered to provide a wide horizontal field of view (100°) while keeping the vertical spread narrow (45°), which maximizes brightness for viewers at street level. #### 2. Durability and Material * **Technology:** AlGaInP (Aluminium Gallium Indium Phosphide), which provides high efficiency for red light emission. * **UV Resistance:** The epoxy contains UV inhibitors to prevent the lens from yellowing or degrading under direct sunlight. * **Standoffs:** The package typically includes "leads with standoffs" to ensure consistent height and heat dissipation during PCB assembly. #### 3. Binning System Cree uses a specific binning code for this part to ensure color and brightness uniformity across large displays: * **Brightness Bins:** Categorized between 770mcd and 2130mcd. * **Color Bins:** Tight wavelength control to ensure "True Red" consistency across thousands of units. --- ### Typical Applications * **Full-Color Outdoor Displays:** Used as the red component in RGB pixel clusters. * **Variable Message Signs (VMS):** Traffic and highway information boards. * **Commercial Advertising:** Large-scale outdoor digital billboards. * **Passenger Information:** Bus and train station signage.