The part number **47LPQ-4W1R-R/Q** typically refers to a high-frequency, surface-mount inductor (often used in power management or RF applications) manufactured by specialized component brands. Below is a breakdown of the electronic characteristics and specifications associated with this type of component. --- ## 1. Component Overview This component is a **Power Inductor** (Fixed Inductor) designed for high-current applications where space-saving and low DC resistance (DCR) are critical. ### Technical Specifications | Feature | Description | | :--- | :--- | | **Inductance** | 1.0 $\mu$H (typically indicated by "1R" in the code) | | **Tolerance** | ±20% (Standard for "M" or "R" designations) | | **Package Type** | Surface Mount (SMD) | | **Core Material** | Ferrite or Composite Metal Powder | | **Application** | DC-DC Converters, VRM, Laptop Power, Handheld devices | --- ## 2. Part Number Breakdown While manufacturer naming conventions vary slightly, the string usually follows this logic: * **47LPQ**: The series identifier. "LPQ" often stands for "Low Profile, High Q" (High Quality factor), indicating it is designed for efficiency and minimal vertical space. * **4W**: Often refers to the physical size/footprint (e.g., 4mm x 4mm). * **1R**: Represents the value. "R" acts as the decimal point. **1R0** or **1R** = **1.0 microhenries ($\mu$H)**. * **R/Q**: Often indicates the packaging style (Tape & Reel) and environmental compliance (RoHS/Quality Grade). --- ## 3. Key Electronic Characteristics ### High Current Handling These inductors are designed to handle high **Saturation Current ($I_{sat}$)**. This is the point where the inductance drops due to the core reaching its magnetic limit. In the 47LPQ series, this is optimized to prevent sudden drops in circuit efficiency. ### Low DCR (Direct Current Resistance) To minimize heat generation and power loss, the internal copper winding is designed with very low resistance. This is vital for battery-operated devices to extend battery life. ### Shielding Most parts in this category are **Magnetically Shielded**. This prevents electromagnetic interference (EMI) from affecting nearby components on the PCB, which is crucial for high-density layouts. --- ## 4. Typical Applications 1. **Voltage Regulator Modules (VRM):** Used in CPUs and GPUs to smooth out power delivery. 2. **Point of Load (POL) Converters:** Converting a main power rail (like 12V) down to 1.8V or 1.2V. 3. **Smartphones/Tablets:** Because of the "LP" (Low Profile) nature, they fit in slim mobile devices.