The **HLMP-BD16-RUT00** is a high-brightness, precision optical performance **Red LED** manufactured by Broadcom (formerly Avago Technologies). It belongs to the HLMP-Bxxx series of AllnGaP (Aluminum Indium Gallium Phosphide) LEDs, which are specifically designed for outdoor applications requiring high visibility. --- ### 1. Key Technical Specifications The following table highlights the primary electrical and optical characteristics of the HLMP-BD16-RUT00: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Color** | Red | Dominant Wavelength: ~630 nm | | **Lens Shape** | Oval (5mm) | Designed for wide horizontal viewing | | **Luminous Intensity** | 310 mcd - 1150 mcd | Varies by binning | | **Forward Voltage ($V_f$)** | 1.8V to 2.4V | Typical operating voltage | | **Forward Current ($I_f$)** | 20 mA | Recommended operating current | | **Viewing Angle** | 70° x 35° | Horizontal x Vertical (Elliptical) | | **Technology** | AlInGaP | High efficiency and reliability | --- ### 2. Physical and Design Features The HLMP-BD16 series is characterized by its physical build, optimized for environmental durability: * **Package Type:** T-1 ¾ (5mm) through-hole package. * **Lens Tinting:** The LED usually features a tinted, non-diffused lens to maximize light output while maintaining color identity when the LED is off. * **Oval Radiation Pattern:** Unlike standard round LEDs, the oval shape provides a wide horizontal viewing angle and a narrow vertical angle. This is ideal for signs where viewers are at the same level as the display but spread out horizontally. * **Lead Frame:** Features an internal stand-off design (the "RUT" suffix often refers to specific lead configurations or packaging) to facilitate wave soldering. --- ### 3. Application Use Cases Due to its high intensity and specific viewing angle, this part is commonly used in: 1. **Variable Message Signs (VMS):** Highway traffic signs and information displays. 2. **Solar Powered Signs:** Due to the high efficiency of AlInGaP technology, it consumes less power for high brightness. 3. **Commercial Outdoor Advertising:** Billboards and stadium displays. 4. **Passenger Information:** Bus and train station destination boards. --- ### 4. Circuit Implementation Example When driving this LED with a microcontroller (like an Arduino) at 5V, you must use a current-limiting resistor. ```cpp // Basic Calculation: // R = (V_supply - V_f) / I_f // R = (5V - 2.0V) / 0.02A = 150 Ohms ``` ---