The **KRTBS-3C4-R** is a specific electronic component produced by **Kingbright**. It is a high-performance **Full-Color (RGB) Surface Mount (SMD) LED**. This part is widely used in applications requiring compact, multi-color light sources. --- ### 1. Key Technical Specifications The following table outlines the core electrical and optical characteristics of the KRTBS-3C4-R: | Parameter | Red (R) | Green (G) | Blue (B) | | :--- | :--- | :--- | :--- | | **Material** | AlGaInP | InGaN | InGaN | | **Peak Wavelength** | 630 nm | 520 nm | 465 nm | | **Luminous Intensity (typ)** | 180 mcd | 500 mcd | 100 mcd | | **Forward Voltage (typ)** | 2.0 V | 3.3 V | 3.3 V | | **Forward Current (max)** | 30 mA | 30 mA | 30 mA | | **Viewing Angle** | 120° | 120° | 120° | --- ### 2. Physical Dimensions and Packaging * **Package Type:** 4-pin SMD (Surface Mount Device). * **Dimensions:** Approximately **1.6mm x 1.6mm** (1616 metric). * **Profile:** Low profile (height approx 0.7mm), making it ideal for thin electronic assemblies. * **Lens Style:** Water Clear, which ensures maximum light output and color mixing. --- ### 3. Connection Diagram (Internal Logic) The device typically uses a **Common Anode** configuration, meaning all three LED chips (Red, Green, Blue) share a single positive terminal. ```text Pin 1: Cathode (Red) Pin 2: Common Anode (+) Pin 3: Cathode (Blue) Pin 4: Cathode (Green) ``` --- ### 4. Typical Applications Because of its small footprint and the ability to produce any color in the visible spectrum via PWM (Pulse Width Modulation), the KRTBS-3C4-R is commonly found in: * **Backlighting:** For LCD screens, switches, and buttons. * **Indicators:** Smart home devices, wearable electronics, and status lights. * **Decorative Lighting:** LED strips and architectural accent lighting. * **Automotive:** Interior dashboard illumination. --- ### 5. Design Considerations * **Current Limiting:** Always use series resistors for each color channel to prevent thermal runaway. * **Heat Dissipation:** While small, operating all three colors at maximum current simultaneously generates heat; ensure the PCB layout includes adequate copper traces for cooling. * **ESD Sensitivity:** Like most InGaN devices (Blue and Green), this part is sensitive to static electricity. Handle with appropriate ESD precautions.