The **KRTB-2C2-R** is a specific electronic component manufactured by **Kingbright**. It is a high-performance **Full-Color (RGB) Surface Mount Device (SMD) LED**. This component is widely used in applications requiring compact, multi-color light sources. --- ## 1. Technical Specifications Below are the primary technical parameters for the KRTB-2C2-R: | Parameter | Red (R) | Green (G) | Blue (B) | | :--- | :--- | :--- | :--- | | **Material** | AlGaInP | InGaN | InGaN | | **Peak Wavelength** | 630 nm | 520 nm | 465 nm | | **Luminous Intensity** | ~120 mcd | ~280 mcd | ~60 mcd | | **Forward Voltage (Typ)** | 2.0 V | 3.2 V | 3.2 V | | **Forward Current (Max)** | 30 mA | 30 mA | 30 mA | | **Viewing Angle** | 120° | 120° | 120° | --- ## 2. Physical Characteristics The "2C2" designation often refers to the package style and pin configuration. * **Package Dimensions:** Typically 1.6mm x 1.6mm or 2.0mm x 2.0mm (standard SMD footprint). * **Encapsulation:** Water clear lens for maximum light output and color mixing. * **Pin Configuration:** Usually a **Common Anode** or **Common Cathode** 4-pin configuration, allowing independent control of each color chip to produce a full spectrum of colors (including white). --- ## 3. Key Features * **Moisture Sensitivity:** Usually rated at MSL 3, requiring proper storage to avoid "popcorning" during reflow. * **RoHS Compliant:** Lead-free and environmentally friendly. * **Uniformity:** Designed for high color consistency across large batches, which is critical for LED displays. * **Low Power Consumption:** Optimized for battery-operated handheld devices. --- ## 4. Typical Applications The KRTB-2C2-R is commonly found in: 1. **Backlighting:** Keypads, LCDs, and push-button switches. 2. **Indicators:** Status lights for consumer electronics (e.g., smart home hubs). 3. **Wearables:** Small form-factor devices like fitness trackers. 4. **Automotive:** Interior ambient lighting and dashboard indicators. --- ## 5. Basic Circuit Example To drive this LED using a microcontroller (like an Arduino), you must use current-limiting resistors for each channel. ```cpp // Example: Setting a purple color on the KRTB-2C2-R int redPin = 9; // Connect to Red Cathode int greenPin = 10; // Connect to Green Cathode int bluePin = 11; // Connect to Blue Cathode void setup() { pinMode(redPin, OUTPUT); pinMode(greenPin, OUTPUT); pinMode(bluePin, OUTPUT); } void loop() { analogWrite(redPin, 255); // Full Red analogWrite(greenPin, 0); // No Green analogWrite(bluePin, 200); // High Blue } ```