The **KRTBS-3CB-R** is a specific electronic component manufactured by **Kingbright**. It is a high-performance **Tri-Color (RGB) Surface Mount (SMD) LED**. This component is widely used in full-color displays, backlighting, and status indicators where compact size and high brightness are required. --- ### 1. General Specifications The KRTBS-3CB-R belongs to the "Tri-Color" family, meaning it integrates three separate LED chips (Red, Green, and Blue) into a single package. | Feature | Specification | | :--- | :--- | | **Package Type** | PLCC-4 (Plastic Leaded Chip Carrier) | | **Dimensions** | 3.2mm x 2.8mm x 1.8mm | | **Configuration** | Common Anode | | **Operating Voltage (Typical)** | Red: 2.0V, Green: 3.3V, Blue: 3.3V | | **Operating Current** | 20mA (per color) | | **Viewing Angle** | 120 Degrees | --- ### 2. Spectral Characteristics Each color chip within the package has a specific dominant wavelength and luminous intensity. | Color | Wavelength (nm) | Luminous Intensity (mcd @ 20mA) | | :--- | :--- | :--- | | **Red** | 621 nm | 150 - 400 mcd | | **Green** | 525 nm | 500 - 1000 mcd | | **Blue** | 470 nm | 150 - 400 mcd | --- ### 3. Pin Configuration and Circuitry The KRTBS-3CB-R typically features a **Common Anode** architecture. This means the positive terminals (Anodes) of all three LEDs are connected to a single pin, while the negative terminals (Cathodes) are controlled individually to mix colors. #### Typical Wiring Logic: ```text Pin 1: Cathode (Red) Pin 2: Common Anode Pin 3: Cathode (Blue) Pin 4: Cathode (Green) ``` --- ### 4. Key Features & Applications * **Color Mixing:** By using Pulse Width Modulation (PWM) on the three cathode pins, the LED can produce virtually any color in the visible spectrum. * **MSL Rating:** Moisture Sensitivity Level (MSL) 3, requiring proper storage to prevent damage during reflow soldering. * **Durability:** High ESD (Electrostatic Discharge) threshold for improved reliability in industrial environments. **Common Applications:** 1. **Status Indicators:** Multi-color signaling for industrial machinery. 2. **Backlighting:** Uniform lighting for LCDs and switches. 3. **Decorative Lighting:** Architectural and consumer electronics lighting effects. 4. **Gaming Peripherals:** RGB lighting for keyboards and mice. ---