The **47LR-100B-R** is a specific electronic component, primarily identified as a **Radial Leaded Inductor** (specifically a Power Choke). These are often used in power management and filtering circuits. --- ### 1. Technical Specifications The part number follows a standard nomenclature for passive components. Below is a breakdown of its typical specifications: | Feature | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 10 $\mu$H | The energy storage capacity. | | **Tolerance** | $\pm$20% (Standard) | The allowable variance from the rated inductance. | | **Mounting Type** | Radial Through-Hole | Two leads exiting from the bottom of the component. | | **Termination** | Matte Tin (RoHS) | Indicated by the "-R" suffix (Lead-free/RoHS compliant). | | **Core Material** | Ferrite | High-permeability material used to concentrate magnetic flux. | --- ### 2. Physical Characteristics These inductors are typically constructed with a wire winding around a cylindrical ferrite core, often wrapped in a **UL-rated polyolefin shrink tube** for insulation and mechanical protection. * **Size:** Compact footprint designed for vertical mounting on PCBs. * **Durability:** The shrink tubing protects the fine copper wire from oxidation and physical damage. * **Operating Temperature:** Generally rated for **-40°C to +85°C** (or higher depending on the specific manufacturer series). --- ### 3. Key Applications Inductors like the 47LR series are essential for managing electrical noise and voltage stability. * **DC/DC Converters:** Used as energy storage elements in buck or boost converters. * **Power Supplies:** Acts as a filter to smooth out ripples in rectified AC power. * **EMI/RFI Filtering:** Suppresses high-frequency noise in signal lines or power inputs. * **Consumer Electronics:** Found in TVs, computers, and household appliances. --- ### 4. Comparison: Why Radial over SMD? | Factor | Radial (47LR) | Surface Mount (SMD) | | :--- | :--- | :--- | | **Mechanical Strength** | High (Leads go through PCB) | Lower (Soldered to pads) | | **Current Handling** | Often higher due to larger wire | Limited by small package size | | **Production** | Better for prototyping/manual assembly | Optimized for high-speed pick-and-place |