## QTLP600C-R Electronic Component Overview The **QTLP600C-R** is a surface-mount (SMD) Light Emitting Diode (LED) manufactured by ON Semiconductor (formerly Fairchild). It belongs to the 0603 package category and is widely used for status indication in compact electronic devices. ### Technical Specifications The following table summarizes the primary electrical and optical characteristics of the QTLP600C-R: | Parameter | Specification | | :--- | :--- | | **LED Color** | Red | | **Wavelength** | 630 nm (Peak) / 624 nm (Dominant) | | **Luminous Intensity** | 5 mcd (Typical) @ 20mA | | **Forward Voltage ($V_f$)** | 2.0V (Typical) / 2.4V (Max) | | **Forward Current ($I_f$)** | 30 mA (Maximum) | | **Viewing Angle** | 100° | | **Package Size** | 0603 (1.6mm x 0.8mm x 0.6mm) | | **Lens Type** | Water Clear | --- ### Key Features 1. **Small Footprint:** The 0603 industry-standard package allows for high-density placement on Printed Circuit Boards (PCBs). 2. **Wide Viewing Angle:** A 100-degree viewing angle ensures visibility from various directions, making it ideal for backlighting and indicators. 3. **Automated Assembly:** Compatible with automatic placement equipment and infrared (IR) reflow soldering processes. 4. **Moisture Sensitivity:** Typically rated at MSL level 3, requiring proper handling and storage to prevent damage during soldering. ### Typical Applications * **Consumer Electronics:** Power and status indicators on laptops, routers, and mobile devices. * **Telecommunications:** Signal strength and connectivity lights. * **Industrial:** Control panels and diagnostic displays. * **Backlighting:** Illuminating membrane switches and small LCD screens. --- ### Schematic and Circuit Considerations When integrating the QTLP600C-R into a circuit, a current-limiting resistor ($R$) is required to prevent the LED from burning out. **Calculation Formula:** `R = (V_source - V_f) / I_f` **Example:** For a 5V supply and a desired current of 20mA (0.02A): ```text R = (5V - 2.0V) / 0.02A R = 150 Ohms ```