The **47LCT-1D2R-R** is a specific electronic component, typically categorized as a **Surface Mount Device (SMD) Power Inductor**. These components are widely used in power management circuits to store energy in a magnetic field and filter high-frequency noise. Below is a detailed breakdown of the technical aspects and specifications for this part. --- ## 1. Component Overview The 47LCT-1D2R-R is often associated with manufacturers like **Bourns** or similar magnetic component specialists. It belongs to the high-current, low-profile inductor family. ### Key Specifications Table | Feature | Typical Value / Description | | :--- | :--- | | **Component Type** | Power Inductor (Shielded) | | **Inductance** | 1.2 µH (Represented by "1D2R") | | **Mounting Type** | SMD (Surface Mount Device) | | **Tolerance** | ±20% (Typical for power inductors) | | **Core Material** | Metal Alloy / Carbonyl Powder | | **RoHS Compliant** | Yes (Indicated by the "-R" suffix) | --- ## 2. Technical Breakdown of the Part Number Manufacturers use a specific nomenclature to describe the physical and electrical properties of the part: * **47LCT**: Refers to the series or family of the inductor. This usually dictates the physical dimensions (footprint) and the core technology. * **1D2R**: This is the **Inductance Code**. * `1` = First digit * `D` = Decimal point (sometimes used in place of 'R' in certain systems) * `2` = Second digit * `R` = Decimal point (standard) * Result: **1.2 microhenries (µH)**. * **-R**: Generally indicates **RoHS compliance** (Restriction of Hazardous Substances) and often implies that the part is lead-free. --- ## 3. Physical & Electrical Characteristics ### Magnetic Shielding These inductors are usually **shielded**. This means the magnetic flux is contained within the body of the component, which: 1. Reduces Electromagnetic Interference (EMI) with neighboring components. 2. Increases efficiency in compact PCB layouts. ### Saturation Current ($I_{sat}$) Due to the metal alloy core, these parts have a high saturation current. This allows the inductor to maintain its inductance even when high levels of DC current flow through it, preventing the core from "saturating" and losing effectiveness. ### DC Resistance (DCR) The part is designed with a very low DCR to minimize power loss (heat) during operation, making it ideal for battery-operated devices. --- ## 4. Common Applications | Application | Function | | :--- | :--- | | **DC/DC Converters** | Voltage regulation in laptops, tablets, and smartphones. | | **GPU/CPU Power** | Providing stable, high-current power to processors. | | **Point of Load (POL)** | Final stage voltage regulation on complex motherboards. | | **Automotive** | Used in infotainment and ADAS systems (if AEC-Q200 qualified). | ---