The **HLMP-CB26-R0CDD** is a high-brightness, blue LED manufactured by Broadcom (formerly Avago Technologies). It belongs to the T-1 ¾ (5mm) high-intensity lamp family, specifically designed for applications requiring superior light output and clarity. --- ## 1. Technical Specifications Below are the primary electronic and optical characteristics of the HLMP-CB26-R0CDD: | Parameter | Value / Specification | | :--- | :--- | | **LED Color** | Blue | | **Dominant Wavelength** | 470 nm (typical) | | **Luminous Intensity ($I_v$)** | 520 mcd to 800 mcd (at 20mA) | | **Viewing Angle** | 23° | | **Forward Current ($I_f$)** | 20 mA (Test Condition) / 30 mA (Max) | | **Forward Voltage ($V_f$)** | 3.2V (typical) / 3.8V (max) | | **Package Type** | T-1 ¾ (5mm) Round | | **Lens Appearance** | Blue Tinted, Non-Diffused (Clear) | --- ## 2. Key Features and Construction ### Optical Performance * **InGaN Technology:** This LED utilizes Indium Gallium Nitride (InGaN) material, which allows for higher efficiency and brightness compared to older Silicon Carbide (SiC) blue LEDs. * **Radiation Pattern:** The 23-degree viewing angle provides a focused beam, making it suitable for directional signaling and status indicators. ### Physical Attributes * **Lead Frame:** Features a standard lead-frame design for through-hole PCB mounting. * **Standoffs:** This specific model often includes "leads with standoffs," which helps in maintaining a uniform height above the PCB and facilitates air circulation during soldering. --- ## 3. Application Use Cases Due to its high intensity and specific wavelength, this part is commonly used in: 1. **Electronic Signs:** Variable message signs and commercial advertising displays. 2. **Indicators:** High-visibility status indicators for industrial or consumer electronics. 3. **Backlighting:** Illumination for panels or buttons where clear, blue light is required. --- ## 4. Typical Connection Circuit To operate this LED safely, a current-limiting resistor is required. Below is a simple calculation example for a 5V supply: ```python # Calculation for Series Resistor (R) # Formula: R = (Source Voltage - Forward Voltage) / Forward Current source_v = 5.0 # Volts forward_v = 3.2 # Volts current = 0.02 # 20 mA resistor_value = (source_v - forward_v) / current print(f"Required Resistor: {resistor_value} Ohms") # Result: 90 Ohms (Use next standard value, e.g., 100 Ohms) ```