The part number **47LAC-2D0R-R** refers to a specific series of **surface-mount (SMD) power inductors**, typically manufactured by companies like **Sumida** or similar suppliers specializing in magnetic components. Below is a detailed breakdown of the electronic characteristics and specifications associated with this component type. --- ### 1. General Specifications This part is a high-performance inductor designed for DC-DC conversion and power management circuits. | Feature | Specification (Typical) | | :--- | :--- | | **Inductance** | 2.0 µH (indicated by "2D0") | | **Tolerance** | ±20% (standard for R-suffix parts) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Shielding** | Magnetically Shielded (prevents EMI) | | **Core Material** | Ferrite | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Part Number Deciphering Understanding the alphanumeric code helps in identifying the component's physical and electrical properties: * **47L / 47LAC**: Refers to the series type and physical dimensions (usually approximately 4.7mm x 4.7mm). * **2D0**: Represents the inductance value. The "D" acts as a decimal point. **2.0 Microhenries (µH)**. * **R**: Generally signifies the tolerance or the packaging type (Tape & Reel) and environmental compliance (RoHS). --- ### 3. Key Performance Characteristics #### A. Magnetic Shielding The "LAC" series is typically **shielded**. This means the magnetic field is contained within the component, reducing electromagnetic interference (EMI) with neighboring components on the PCB. This is critical for compact devices like smartphones or laptops. #### B. Current Ratings These inductors are characterized by two types of current limits: 1. **Saturation Current ($I_{sat}$)**: The current level at which the inductance drops by a specific percentage (usually 30%). 2. **Temperature Rise Current ($I_{rms}$)**: The current that causes the component temperature to rise by 40°C above ambient. #### C. DC Resistance (DCR) This part is engineered for **Low DCR**. A lower resistance ensures higher efficiency and less heat generation during power conversion. --- ### 4. Common Applications Due to its small footprint and shielding, this part is used in: * **DC-DC Converters**: Buck, Boost, and Buck-Boost regulators. * **Mobile Devices**: Power rails for CPUs and GPUs in tablets and phones. * **LED Drivers**: Providing stable current for backlight displays. * **Portable Electronics**: Digital cameras and handheld gaming consoles. ---