## Overview of QBLP670D-R The **QBLP670D-R** is a high-brightness Red Surface Mount Device (SMD) LED manufactured by **QT-Brightek**. It belongs to the PLCC-2 package family, which is industry-standard for versatile lighting applications ranging from automotive dashboards to industrial status indicators. --- ### Technical Specifications The following table outlines the key electrical and optical characteristics of the QBLP670D-R: | Parameter | Specification | | :--- | :--- | | **Emitted Color** | Red | | **Material** | AlGaInP (Aluminum Gallium Indium Phosphide) | | **Package Type** | PLCC-2 (Top View) | | **Forward Current ($I_F$)** | 20 mA (Typical) | | **Forward Voltage ($V_F$)** | 2.0 V (Typical) / 2.5 V (Max) | | **Luminous Intensity ($I_V$)** | 160 mcd - 320 mcd @ 20mA | | **Dominant Wavelength ($\lambda_D$)** | 620 nm - 630 nm | | **Viewing Angle** | 120 Degrees | | **Operating Temperature** | -40°C to +85°C | --- ### Key Electronic Features 1. **Efficiency and Material**: The use of **AlGaInP** technology ensures high luminous efficiency and reliable performance even at higher temperatures compared to older GaAsP technologies. 2. **PLCC-2 Packaging**: The 3528 (3.5mm x 2.8mm) footprint provides a larger soldering surface, which improves heat dissipation and mechanical stability on the PCB. 3. **Wide Viewing Angle**: With a **120° viewing angle**, it provides a wide, uniform light distribution, making it ideal for backlighting and light pipes. 4. **Polarity Identification**: The package features a "cathode mark" (usually a notched corner) to ensure correct orientation during the automated assembly process. --- ### Typical Applications * **Status Indicators**: Used in consumer electronics and industrial equipment. * **Backlighting**: Ideal for LCDs, switches, and pushbuttons. * **Automotive**: Dashboard illumination and interior lighting. * **Signage**: Indoor displays and channel letters. --- ### Schematic Representation ```text Anode (+) Cathode (-) | | +-----+------------------+-----+ | | (LED) | | | +-------|<|--------+ | <-- Internal Diode Structure +------------------------------+ PLCC-2 Package ```