The **CP41B-RFS-CL0P0EE4** is a high-performance Red LED manufactured by **Cree LED** (now part of SGH). It belongs to the **P4 (Piranha)** family, known for its unique four-pin package design which provides excellent thermal management and stability. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Color** | Red | | **Wavelength** | 618nm - 630nm (Dominant) | | **Luminous Flux** | 4.4 lm - 11.0 lm | | **Forward Current ($I_F$)** | 70 mA | | **Forward Voltage ($V_F$)** | 2.1V (Typical) / 3.0V (Max) | | **Viewing Angle** | 70° | | **Lens Appearance** | Water Clear | | **Package Type** | 7.6mm Square (4-pin Piranha) | --- ### 2. Physical and Electrical Characteristics * **Four-Pin Design:** The "Piranha" style package uses four leads. This is not for complex electrical logic, but rather for **thermal dissipation**. It allows heat to move away from the LED die more efficiently than standard 5mm LEDs, enabling it to run at a higher current (70mA). * **Rugged Construction:** These LEDs are typically encapsulated in optical-grade epoxy, making them highly resistant to vibration and thermal shock. * **Flux Output:** Unlike standard indicator LEDs measured in mcd (millicandela), the CP41B is measured in **Lumens (lm)** because it is designed for illumination and signaling rather than just status indication. --- ### 3. Part Number Breakdown The nomenclature `CP41B-RFS-CL0P0EE4` conveys specific binning information: * **CP41B:** Series Model (P4 LED 7.6mm). * **RFS:** Red color with a specific intensity/wavelength range. * **CL0P0EE4:** This suffix refers to the internal Cree binning codes for: * **Luminous Flux Bin:** Minimum light output. * **Color Bin:** Specific nanometer range of the red light. * **Voltage Bin:** Grouping by forward voltage requirements. --- ### 4. Common Applications Due to its high brightness and wide viewing angle, this component is frequently found in: 1. **Automotive Lighting:** Brake lights, turn signals, and side markers. 2. **Entertainment/Signage:** Large-scale outdoor displays or channel letters. 3. **Safety/Emergency:** Strobe lights, exit signs, and emergency vehicle light bars.