The **HLMP-EH10-R2000** is a high-performance Red-Orange Light Emitting Diode (LED) manufactured by Broadcom (formerly Avago/Agilent). It belongs to the T-1¾ (5mm) high-intensity lamp series, specifically designed for outdoor applications and high-visibility displays. --- ## 1. Technical Specifications The following table highlights the primary electrical and optical characteristics of the HLMP-EH10-R2000: | Parameter | Specification Value | | :--- | :--- | | **Color** | Red-Orange | | **Dominant Wavelength** | 615 nm (Typical) | | **Luminous Intensity** | 1150 mcd to 2500 mcd (@ 20mA) | | **Forward Voltage ($V_F$)** | 1.9V (Typ) / 2.4V (Max) | | **Viewing Angle** | 15 Degrees | | **Lens Appearance** | Water Clear, Non-diffused | | **Mounting Type** | Through-Hole | | **Package Size** | T-1¾ (5mm) | --- ## 2. Key Electronic Features The device is built using **AllnGaP (Aluminum Indium Gallium Phosphide)** technology, which offers several advantages over older LED technologies: * **High Luminous Efficiency:** It produces more light output per unit of electrical power. * **Thermal Stability:** AllnGaP material provides consistent performance even as the temperature of the junction increases. * **Narrow Viewing Angle:** The 15° beam pattern is achieved through a precision optical grade epoxy lens, making it ideal for long-distance visibility. * **Reliability:** Designed to withstand moisture and outdoor environmental stressors. --- ## 3. Application Use Cases Due to its high intensity and narrow focus, this LED is commonly used in: 1. **Variable Message Signs (VMS):** Roadside traffic alerts and information boards. 2. **Solar Powered Signs:** Efficiency is critical for battery-operated outdoor devices. 3. **Commercial Outdoor Advertising:** High-brightness billboards. 4. **Signal Lights:** Traffic signals and pedestrian crossing indicators. --- ## 4. Basic Connection Diagram To prevent burning out the LED, a current-limiting resistor ($R$) is required. **Formula:** $R = (V_{source} - V_F) / I_F$ Assuming a 5V source and a target current of 20mA (0.02A): ```text R = (5V - 1.9V) / 0.02A R = 155 Ohms (Use 160 or 180 Ohm standard resistor) ```