The **47LPT-142R-R** is a specific electronic component typically categorized as a **Surface Mount Device (SMD) Power Inductor**. These parts are essential for voltage regulation and power management in modern electronics. --- ## 1. Component Overview The alphanumeric code provides specific details regarding the electrical properties and physical dimensions of the inductor. ### Technical Specifications | Parameter | Specification (Typical) | |:---|:---| | **Inductance** | 1.4 µH (Microhenries) | | **Tolerance** | ±20% (Commonly) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Current Rating** | High Current (Specific to package size) | | **Shielding** | Often Shielded (to prevent EMI) | | **RoHS Status** | Compliant (Indicated by the '-R' suffix) | --- ## 2. Deciphering the Part Number While manufacturers vary slightly, the nomenclature usually follows this logic: * **47LPT:** Refers to the series or the physical footprint (dimensions) of the inductor. * **142:** Represents the inductance value. In the standard EIA code, the first two digits are the value, and the third is the multiplier. * *Calculation:* $14 \times 10^2$ usually refers to a decimal placement for microhenries, resulting in **1.4 µH**. * **R:** Denotes the decimal point or a specific tolerance/material. * **-R:** Generally stands for **RoHS Compliant** or Tape and Reel packaging. --- ## 3. Function and Applications Power inductors like the 47LPT-142R-R are used to store energy in a magnetic field when electric current flows through them. ### Key Functions 1. **Energy Storage:** Used in DC-DC converters (Buck/Boost) to transfer energy between input and output. 2. **Filtering:** Smooths out ripples in current to provide "clean" DC power to sensitive chips (CPUs, GPUs). 3. **EMI Suppression:** Reduces electromagnetic interference in high-frequency circuits. ### Common Use Cases * **Laptops and Tablets:** For CPU power rails. * **Telecommunications:** In base stations and networking hardware. * **Automotive Electronics:** For infotainment and sensor power management. --- ## 4. Physical Characteristics As an SMD component, it features: * **Small Footprint:** Designed for automated "pick and place" assembly. * **Flat Top:** Allows for vacuum suction nozzles during assembly. * **Robust Construction:** Usually features a ferrite core with copper windings, encapsulated in a resin or metal shield.