The **47LM-100YR-R** is a specific electronic component, typically categorized as a **Surface Mount Device (SMD) Power Inductor**. These parts are essential in power management circuits for filtering and energy storage. --- ### 1. Technical Specifications The part number follows a specific nomenclature common to manufacturers like **Sumida** or similar high-performance magnetic component producers. | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | Shielded Power Inductor | | **Inductance** | 10.0 µH (Microhenries) | | **Tolerance** | ±20% (indicated by 'M') | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Shielding** | Magnetically Shielded (reduces EMI) | | **Termination** | RoHS Compliant (indicated by '-R') | --- ### 2. Breakdown of Part Number Understanding the alphanumeric code helps in identifying the physical and electrical characteristics: * **47L**: Refers to the series/frame size (Physical dimensions, often approx. 4.0mm to 7.0mm footprint). * **M**: Tolerance code (M = ±20%). * **100**: Inductance value code. The first two digits are significant figures, and the third is the multiplier ($10 \times 10^0 = 10$). * **YR**: Specific internal designator for core material or packaging height. * **-R**: Indicates RoHS (Restriction of Hazardous Substances) compliance and Lead-Free status. --- ### 3. Key Functions in a Circuit Inductors like the 47LM-100YR-R serve three primary roles in electronic assemblies: 1. **Energy Storage:** In DC-DC converters (Buck/Boost), it stores energy in a magnetic field during the "on" cycle and releases it during the "off" cycle. 2. **Noise Filtration:** It acts as a low-pass filter, allowing DC current to pass while blocking high-frequency AC noise (ripple). 3. **Voltage Regulation:** Helps maintain a steady output voltage in power supply modules for CPUs, GPUs, and mobile devices. --- ### 4. Common Applications * **Consumer Electronics:** Laptops, tablets, and smartphones. * **Power Supplies:** Switch-mode power supplies (SMPS). * **Automotive:** Infotainment systems and LED lighting drivers. * **Communication:** Base stations and networking hardware.