The **AMPLH4020S-R10M** is a high-performance, surface-mount (SMD) power inductor. This component is typically designed for high-current applications where space is limited and efficiency is critical. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the primary technical characteristics: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.10 µH (indicated by "R10") | | **Tolerance** | ±20% (indicated by "M") | | **Dimensions** | 4.0mm x 4.0mm x 2.0mm (approx. "4020") | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Material Core** | Metal Alloy / Carbonyl Powder (High Saturation) | --- ### 2. Part Number Breakdown Understanding the code helps in identifying the component's limits: * **AMPLH**: Series prefix, often designating "High-Current Metal Alloy Power Inductor." * **4020**: The physical footprint (4.0mm width/length and 2.0mm height). * **S**: Often refers to a specific shielding or manufacturing standard. * **R10**: The inductance value. "R" acts as a decimal point, so $0.10$ Microhenries ($\mu H$). * **M**: The tolerance code, representing $\pm 20\%$. --- ### 3. Core Features & Benefits * **High Saturation Current:** Because it uses a metal alloy core rather than traditional ferrite, it can handle high peak currents without the inductance dropping sharply. * **Low DCR (DC Resistance):** Designed with thick copper windings to minimize power loss and heat generation. * **Magnetically Shielded:** The construction reduces Electromagnetic Interference (EMI), which is vital for dense PCB layouts. * **Soft Saturation:** Unlike ferrite inductors that "crash" at high currents, this part maintains performance more linearly under load. --- ### 4. Common Applications This specific inductor is usually found in high-frequency DC-DC converters: 1. **Voltage Regulator Modules (VRMs):** Used in CPUs and GPUs. 2. **Point of Load (POL) Converters:** Providing stable power for FPGAs or ASICs. 3. **Battery Powered Devices:** Smartphones and tablets where high efficiency is required to save battery life. 4. **Automotive Electronics:** Infotainment systems and ADAS sensors. ---