The **CLM2D-RPC-APC** is a high-performance Surface Mount Device (SMD) LED manufactured by **Cree LED** (formerly Cree Inc.). It belongs to the **CLM2D** family of LEDs, which are specifically designed for high-reliability applications such as automotive signals, channel letters, and indoor/outdoor signage. --- ## 1. Technical Specifications The part number can be broken down to understand its specific electronic characteristics: | Parameter | Specification | | :--- | :--- | | **Color** | Red (624nm typical) | | **Package Type** | PLCC4 (Plastic Leaded Chip Carrier) | | **Luminous Intensity** | 560 mcd - 1400 mcd | | **Viewing Angle** | 120 Degrees | | **Forward Voltage ($V_F$)** | 2.1V (Typical) / 2.6V (Maximum) | | **Forward Current ($I_F$)** | 30mA (Test Current) | | **Operating Temperature** | -40°C to +100°C | --- ## 2. Key Electronic Components & Materials The construction of the CLM2D-RPC-APC involves specific materials to ensure longevity and efficiency: * **Semiconductor Material:** It utilizes **AlInGaP** (Aluminium Indium Gallium Phosphide) technology, which is the standard for high-brightness red, orange, and yellow LEDs. * **Encapsulation:** The LED is housed in a clear epoxy resin, providing high light output and protection for the internal wire bonds. * **Lead Frame:** The PLCC4 package features four leads, though for single-color LEDs like this one, they are often used for thermal dissipation and physical stability on the PCB. --- ## 3. Circuit Integration When designing a circuit for this component, consider the following electronic principles: ### Current Limiting To prevent thermal runaway or burnout, a resistor must be used in series. Calculated using Ohm’s Law: $R = \frac{V_{source} - V_F}{I_F}$ ### Thermal Management The PLCC4 package is designed to dissipate heat through the solder pads. High-density layouts should include "thermal vias" or large copper planes to ensure the junction temperature remains within safe limits. ### Dimming Support The device is compatible with **Pulse Width Modulation (PWM)**, allowing for precise brightness control without shifting the color wavelength significantly. --- ## 4. Typical Applications * **Automotive:** Dashboard illumination, stop lamps, and turn signals. * **Industrial:** Status indicators on control panels. * **Signage:** Full-color video displays and decorative lighting strips. ---