The **CP41T-RFS-CJ0M0EE4** is a high-brightness, high-performance Light Emitting Diode (LED) manufactured by **Cree LED** (formerly Cree Inc.). It belongs to the P4 (Piranha) series, known for its distinctive four-pin square package and reliability. --- ### 1. Key Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Color** | Red | | **Wavelength** | 620 nm - 630 nm (Dominant) | | **Luminous Intensity** | 4,400 mcd - 11,000 mcd | | **Viewing Angle** | 70 Degrees | | **Forward Current ($I_f$)** | 30 mA (Typical) | | **Forward Voltage ($V_f$)** | 2.1 V (Typical) / 2.6 V (Maximum) | | **Package Type** | 7.6 mm x 7.6 mm (4-pin P4) | | **Lens Appearance** | Water Clear | --- ### 2. Physical Design and Packaging The "P4" or "Piranha" package is designed for specific mechanical and thermal advantages: * **Four-Pin Design:** The four leads provide superior mechanical stability on the PCB compared to standard 2-pin LEDs. * **Heat Dissipation:** Multiple leads act as heat sinks, allowing the LED to be driven at higher currents while maintaining a long lifespan. * **Low Profile:** The square, flat-top design is ideal for applications where space and uniform light distribution are required. --- ### 3. Part Number Breakdown The nomenclature follows Cree’s standard LED coding system: * **CP41T:** Product series (High-flux P4 LED). * **RFS:** Red color designation (620-630 nm). * **CJ0M0EE4:** Binning code, which specifies the exact range of brightness (Luminous Flux) and the specific color chromaticity allowed for this part number. --- ### 4. Common Applications Due to its high intensity and robust design, this LED is frequently used in: 1. **Automotive Lighting:** Stop/Tail lights, turn signals, and CHMSL (Center High-Mounted Stop Lamps). 2. **Signage:** Variable Message Signs (VMS), advertising displays, and channel letters. 3. **Industrial:** Status indicators and emergency lighting where high visibility is mandatory. --- ### 5. Circuit Implementation Tips When designing a circuit for the CP41T-RFS: * **Current Limiting:** Always use a series resistor to prevent thermal runaway. * *Formula:* $R = (V_{source} - V_f) / I_f$ * **Thermal Management:** Ensure the PCB copper traces are wide enough to help dissipate heat from the four pins.