The **LPD-41PA-R/Q** is an electronic component typically categorized as a **Surface Mount Device (SMD) LED**, specifically designed as a Right-Angle (Side-view) Chip LED. These parts are commonly used for edge-lighting, indicators, and status displays where space is limited. --- ### 1. Technical Specifications The following table outlines the general electrical and physical characteristics of this series: | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | SMD LED (Surface Mount) | | **Orientation** | Right-Angle / Side View | | **Forward Current ($I_F$)** | 20mA (Standard) | | **Forward Voltage ($V_F$)** | 2.0V - 3.2V (Varies by color) | | **Mounting Type** | SMT (Surface Mount Technology) | | **Operating Temp** | -40°C to +85°C | ### 2. Part Number Breakdown While manufacturer codes vary slightly (often associated with brands like **Lite-On**), the suffixing usually indicates specific bins or packaging: * **LPD:** Series designation for specific LED package types. * **41:** Refers to the physical dimensions (often 1.6 x 0.6 mm or 2.1 x 0.6 mm). * **PA:** Usually denotes the Material/Color (e.g., AlGaInP for Amber/Yellow or InGaN for Blue/White). * **R/Q:** These suffixes typically refer to: * **R:** Refers to **Reverse** mounting or specific **Reel** packaging orientation. * **Q:** Often indicates a specific **Quality** grade or **Brightness/Intensity** binning. ### 3. Key Features * **Low Profile:** The right-angle design allows light to be emitted parallel to the PCB, making it ideal for thin consumer electronics. * **Wide Viewing Angle:** Most side-view LEDs offer a 120° to 140° viewing angle. * **Compatibility:** Designed for high-speed automated placement equipment and infrared (IR) reflow soldering processes. ### 4. Common Applications 1. **LCD Backlighting:** Used in the edges of small displays (wearables, handhelds). 2. **Light Pipes:** Ideal for coupling light into plastic fiber or clear light guides. 3. **Status Indicators:** Used on the edges of PCBs to show power or connectivity through a device chassis. --- ### Typical Circuit Example To use this LED, a current-limiting resistor is required. ```cpp // Formula for Resistor (R): // R = (Source Voltage - Forward Voltage) / Forward Current // Example for 5V Source and 2.1V LED: // R = (5V - 2.1V) / 0.020A = 145 Ohms ```