## HLMP-4100-R0000: Technical Overview The **HLMP-4100-R0000** is a high-intensity, double-heterojunction AlGaAs (Aluminum Gallium Arsenide) Light Emitting Diode (LED). Produced by Broadcom (formerly Avago/Agilent/HP), it is designed for applications requiring high brightness and low power consumption. --- ### 1. Key Technical Specifications The following table outlines the primary electrical and optical characteristics of the HLMP-4100-R0000: | Parameter | Specification | Units | | :--- | :--- | :--- | | **Color** | Deep Red (645 nm) | nm | | **Package Type** | T-1 3/4 (5mm) Round | - | | **Luminous Intensity (Min)** | 320 | mcd | | **Luminous Intensity (Typ)** | 500 | mcd | | **Viewing Angle (2θ½)** | 10 | Degrees | | **Forward Voltage (Typ)** | 1.8 | V | | **Forward Current (Max)** | 20 | mA | | **Lens Appearance** | Clear, Non-diffused | - | --- ### 2. Physical Design and Features * **Construction:** It utilizes a **Double Heterojunction (DH) AlGaAs** chip. This technology provides much higher luminous efficiency compared to standard GaAsP red LEDs. * **Optics:** The 5mm (T-1 3/4) package features a clear, non-diffused lens. This results in a very narrow **10-degree viewing angle**, making it ideal for pinpoint lighting or long-distance visibility. * **Durability:** The lead frame is designed for standard through-hole mounting with a robust epoxy resin that is resistant to moisture and heat. --- ### 3. Application Use Cases Due to its high brightness and narrow beam, this LED is commonly found in: * **Outdoor Signs:** Variable message signs and traffic signals. * **Industrial Indicators:** Status lights that must be visible in high-ambient light environments. * **Medical Equipment:** High-contrast displays and sensors. * **Consumer Electronics:** High-end indicators or backlighting where energy efficiency is critical. --- ### 4. Comparison with Standard Red LEDs Standard red LEDs (GaAsP) typically emit light at a 635nm wavelength and offer significantly lower brightness levels. The HLMP-4100-R0000 offers: 1. **Lower Power Consumption:** It produces more light (mcd) per milliamp (mA). 2. **Higher Contrast:** The deep red 645nm wavelength provides better visibility in sunlight. 3. **Longevity:** AlGaAs technology typically shows better degradation characteristics over time compared to older technologies.