## Overview of QBLP610-R The **QBLP610-R** is a Surface Mount Device (SMD) Light Emitting Diode (LED) manufactured by **QT-Brightek**. It belongs to the 1206 package size category and is designed for applications requiring a compact, high-efficiency red light source. --- ### Technical Specifications The following table summarizes the key electrical and optical characteristics of the QBLP610-R: | Parameter | Specification | | :--- | :--- | | **LED Color** | Red | | **Package Size** | 1206 (3.2 x 1.6 x 1.1 mm) | | **Wavelength (Peak)** | ~630 nm | | **Luminous Intensity** | 80 - 160 mcd @ 20mA | | **Forward Voltage ($V_F$)** | 1.7V (Min) - 2.4V (Max) | | **Forward Current ($I_F$)** | 20 mA (Typical) | | **Viewing Angle** | 140° | | **Lens Appearance** | Water Clear | --- ### Key Features and Applications #### Features - **Compact Footprint:** The 1206 industry-standard size allows for high-density PCB mounting. - **High Reliability:** Designed for long operational life and stable performance. - **Broad Viewing Angle:** 140-degree spread makes it ideal for wide-area indication. - **Compatibility:** Suitable for automated surface mount assembly processes (Reflow soldering). #### Applications 1. **Status Indicators:** Used on networking equipment, servers, and consumer electronics. 2. **Backlighting:** Ideal for membrane switches, icons, and LCD displays. 3. **Consumer Electronics:** Battery level indicators and power buttons. 4. **Industrial Equipment:** Control panel signaling. --- ### Pin Configuration and Dimensions The device follows standard SMD polarity conventions. Usually, a notch or a green mark on the bottom of the PCB indicates the **Cathode (-)** side. ```text Top View _______________ | | | [ LED ] | <-- Clear Lens |_______________| (A) (K) Anode (+) Cathode (-) ``` --- ### Recommended Operating Conditions To ensure longevity, it is recommended to drive the LED using a current-limiting resistor. The resistance ($R$) can be calculated using Ohm's Law: `R = (V_source - V_F) / I_F` *Example: For a 5V supply and a 20mA target current:* `R = (5V - 2.0V) / 0.020A = 150 Ohms`