## Technical Overview: CP41B-RFS-CM0P0EE4 The **CP41B-RFS-CM0P0EE4** is a high-brightness **Piranha (Super Flux) LED** manufactured by **Cree LED** (now part of SMART Global Holdings). These LEDs are known for their rugged design and excellent thermal management, making them ideal for automotive and outdoor signaling applications. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Color** | Red | | **Wavelength** | 620nm - 630nm (Dominant) | | **Luminous Flux** | 4.4 lm - 11.0 lm | | **Viewing Angle** | 70 Degrees | | **Forward Current ($I_f$)** | 70 mA | | **Forward Voltage ($V_f$)** | 2.1V (Typical) / 3.0V (Max) | | **Package Type** | 4-pin Piranha (7.6mm x 7.6mm) | | **Lens Appearance** | Water Clear | --- ### 2. Physical & Electronic Characteristics #### Package Design (Piranha/Super Flux) * **4-Pin Layout:** Unlike standard 5mm LEDs that have 2 leads, this part has 4 leads. This provides superior mechanical stability and acts as a heat sink to dissipate thermal energy more efficiently. * **Thermal Management:** The design allows the LED to be driven at higher currents (up to 70mA) without overheating, which results in higher light output compared to standard through-hole LEDs. #### Optical Performance * **Radiation Pattern:** It features a wide viewing angle of 70°, which provides uniform light distribution, essential for signs and automotive lamps. * **High Reliability:** The materials used (AlInGaP) ensure long-term stability and resistance to degradation under UV exposure. --- ### 3. Common Applications Due to its high intensity and durability, this component is frequently used in: 1. **Automotive Lighting:** Stop lights, turn signals, and tail lamps. 2. **Electronic Signs:** Variable Message Signs (VMS) and traffic signals. 3. **Entertainment:** Amusement park rides and decorative lighting. 4. **Channel Letters:** Illumination for commercial signage. --- ### 4. Circuit Implementation Example To drive this LED using a 12V DC power supply, a current-limiting resistor is required. ```cpp // Calculation for a 12V Source at 50mA current // R = (V_source - V_forward) / I_forward // R = (12V - 2.1V) / 0.050A = 198 Ohms // Recommended: Use a 220 Ohm resistor for safety. ``` ---