The **HLMP-EJ10-R2000** is a high-intensity, T-1¾ (5mm) AllnGaP (Aluminum Indium Gallium Phosphide) LED manufactured by Broadcom (formerly Avago/Agilent). It is specifically designed for applications requiring high brightness and reliable performance in outdoor or bright-light conditions. --- ### ## Technical Specifications The following table summarizes the key electronic and optical characteristics of the HLMP-EJ10-R2000: | Parameter | Specification | | :--- | :--- | | **Color** | Orange (Amber) | | **Dominant Wavelength** | 605 nm | | **Luminous Intensity (Min/Max)** | 960 mcd to 2500 mcd | | **Viewing Angle** | 15° (Narrow Beam) | | **Forward Voltage ($V_f$)** | 1.9V (Typ) / 2.4V (Max) | | **Forward Current ($I_f$)** | 20 mA (Standard) | | **Package Type** | T-1¾ (5mm) Round | | **Lens Appearance** | Clear, Non-diffused | --- ### ### Key Electronic Components & Materials 1. **Die Technology:** It uses **AllnGaP** technology. Compared to older GaP technologies, AllnGaP offers significantly higher luminous efficiency and better performance stability over temperature changes. 2. **Encapsulation:** The LED is housed in an optical-grade epoxy. This provides high temperature and moisture resistance, making it suitable for outdoor signs and signals. 3. **Lead Frame:** The leads are typically silver-plated to ensure excellent conductivity and ease of soldering (wave soldering compatible). --- ### ### Application Considerations Because this specific model features a **15-degree viewing angle**, it produces a highly directional, concentrated beam of light. This makes it ideal for: * **Variable Message Signs:** Traffic signals and commercial billboards. * **Automotive:** Exterior lighting (turn signals, stop lamps). * **Status Indicators:** Sunlight-readable indicators for industrial machinery. --- ### ### Typical Circuit Implementation When integrating this LED into a circuit, a current-limiting resistor is required. To calculate the resistor for a 5V source: ```python # Ohms Law: R = (V_source - V_forward) / I_forward v_source = 5.0 v_forward = 1.9 i_forward = 0.020 # 20mA resistor_value = (v_source - v_forward) / i_forward print(f"Required Resistor: {resistor_value} Ohms") # Result: 155 Ohms (Use 160 or 180 Ohm standard resistor) ```