The **HLMP-AD11-R0TYY** is a high-performance light-emitting diode (LED) manufactured by Broadcom (formerly Avago Technologies). It is specifically designed for signage and illumination applications that require high brightness and a specific viewing angle. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **LED Type** | Through-Hole (Radial) | | **Color** | Red | | **Dominant Wavelength** | 626 nm (typical) | | **Lens Shape** | Oval (Precision Optical Performance) | | **Viewing Angle** | 70° (Horizontal) x 35° (Vertical) | | **Luminous Intensity** | 520 mcd to 1500 mcd (Range R to T) | | **Forward Voltage ($V_f$)** | 1.8V to 2.4V (typical) | | **Package Size** | 5mm (T-1 ¾) | --- ### 2. Core Features and Construction * **Oval Spatial Radiation Pattern:** Unlike standard round LEDs, this part uses an oval lens. This shape is engineered to provide a wide horizontal viewing angle and a narrower vertical angle, making it ideal for outdoor signs where viewers are spread horizontally but at a similar eye level. * **AllnGaP Technology:** The LED chip is made from Aluminum Indium Gallium Phosphide (AllnGaP). This material is known for high luminous efficiency and excellent performance stability over long periods. * **Epoxy Package:** It is encapsulated in a tinted, diffused epoxy that provides UV resistance, ensuring the plastic doesn't degrade or yellow when used in outdoor sunlight. --- ### 3. Part Number Breakdown (Suffix Meaning) The specific suffix **-R0TYY** provides information about the binning and packaging: 1. **R**: Represents the minimum intensity bin (starting at approximately 520 mcd). 2. **0**: Indicates that there is no specific limit on the maximum intensity bin (up to the highest available). 3. **T**: Refers to the color bin (Red has a narrow wavelength range, so this often refers to the standard red spectrum). 4. **YY**: Typically denotes specific bulk or ammo-pack packaging options for automated assembly. --- ### 4. Common Applications * **Variable Message Signs (VMS):** Used in highway traffic signs and public transport displays. * **Commercial Advertising:** Outdoor billboards and shop displays. * **Status Indicators:** Industrial equipment where visibility from different horizontal angles is required. ---