The **KRTBS-3C2-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 display panels, backlighting, and decorative lighting where space is limited but high color output is required. --- ### 1. Key Technical Specifications The device contains three separate LED chips (Red, Green, and Blue) within a single package, allowing for full-color mixing. | Parameter | Red (R) | Green (G) | Blue (B) | |:---|:---|:---|:---| | **Wavelength (Typ)** | 621 nm | 525 nm | 465 nm | | **Luminous Intensity** | 120-250 mcd | 300-600 mcd | 100-200 mcd | | **Forward Voltage (Typ)** | 2.0 V | 3.2 V | 3.2 V | | **Viewing Angle** | 120° | 120° | 120° | --- ### 2. Package and Construction The "KRTB" series identifies this as a sub-miniature RGB SMD device. * **Package Dimensions:** Typically 1.0mm x 1.0mm (1010 package size) or 1.6mm x 1.6mm depending on the specific sub-series. * **Encapsulation:** Clear epoxy lens for maximum light transmission. * **Common Cathode/Anode:** Usually configured as a **4-pin** device where one pin is common (Common Anode is standard for this series) and the other three control the individual colors. --- ### 3. Application Use Cases Due to its small footprint and precise color control, the KRTBS-3C2-R is found in: 1. **Indoor Video Walls:** High-density LED screens and billboards. 2. **Consumer Electronics:** Indicator lights for smartphones, wearable tech, and smart home hubs. 3. **Backlighting:** Illuminating membrane switches and LCD panels. 4. **Gaming Peripherals:** RGB lighting for keyboards and mice. --- ### 4. Implementation Example To interface this LED with a microcontroller (like an Arduino or ESP32), you must use current-limiting resistors for each color channel. ```cpp // Example: Setting a Purple color on KRTBS-3C2-R int redPin = 9; int greenPin = 10; int bluePin = 11; void setup() { pinMode(redPin, OUTPUT); pinMode(greenPin, OUTPUT); pinMode(bluePin, OUTPUT); } void loop() { analogWrite(redPin, 255); // Red Full analogWrite(greenPin, 0); // Green Off analogWrite(bluePin, 255); // Blue Full } ``` --- ### 5. Handling Precautions * **Moisture Sensitivity:** These are MSL (Moisture Sensitivity Level) rated. They must be stored in vacuum-sealed bags to prevent damage during reflow soldering. * **ESD Sensitivity:** Blue and Green chips are sensitive to static electricity. Proper ESD grounding is required during assembly.