The part number **47LAC-1A0R-R** corresponds to a specific electronic component, typically identified as a **High-Current Power Inductor** (often from the 47L series produced by manufacturers like Coilcraft or similar magnetic component specialists). Below is a detailed breakdown of its specifications, construction, and typical applications. --- ### 1. Specification Overview The "47LAC" series is designed for high-density power applications where low DC resistance (DCR) and high saturation currents are required. | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | Shielded Power Inductor | | **Inductance** | 1.0 µH (indicated by "1A0") | | **Tolerance** | ±20% (Standard for this series) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Shielding** | Magnetically Shielded (Low EMI) | | **Packaging** | Tape and Reel ("-R" suffix) | --- ### 2. Part Number Deciphering To understand the specific properties of the 47LAC-1A0R-R, we can break down the alphanumeric code: * **47LAC**: The Series identifier. This defines the physical size (footprint) and the core material technology (usually a composite metal powder core). * **1A0**: The Inductance value. The 'A' acts as a decimal point. 1A0 = **1.0 microhenries (µH)**. * **R**: Tolerance or Revision code (often ±20% for these power inductors). * **-R**: Packaging suffix, signifying **Tape and Reel**, used for automated pick-and-place assembly. --- ### 3. Key Technical Characteristics These parts are engineered for performance in modern DC-DC converters: * **Soft Saturation:** Unlike traditional ferrite cores that lose inductance sharply when current increases, the metal powder core in the 47LAC series exhibits "soft" saturation, meaning it maintains inductance more effectively under heavy loads. * **Low DCR:** The use of flat wire or heavy-gauge copper minimizes power loss through heat (Joule heating). * **EMI Suppression:** Because the inductor is shielded, the magnetic flux is contained within the body, reducing interference with surrounding sensitive components on the PCB. --- ### 4. Typical Applications The 47LAC-1A0R-R is most commonly found in high-efficiency power stages: 1. **Voltage Regulator Modules (VRMs):** Used in motherboards and GPU power delivery. 2. **Point-of-Load (POL) Converters:** Converting a main power rail (e.g., 12V) down to a lower voltage (e.g., 1.2V) for CPUs. 3. **Battery Powered Devices:** High efficiency ensures longer battery life. 4. **Distributed Power Systems:** Used in telecommunications and industrial servers. --- ### 5. Recommended Footprint Example *Note: Always refer to the specific manufacturer datasheet for exact millimeter dimensions.* ```markdown [ Top View ] _______ | | | 1R0 | <-- Part Marking |_______| [ Side View ] _______ |_______| <-- Low profile height (usually 3mm - 5mm) |_| |_| <-- Solder pads ```