## Technical Overview: FDV0620-H-R68M The **FDV0620-H-R68M** is a high-current, surface-mount (SMD) fixed inductor manufactured by **Murata Electronics** (formerly Toko). It is part of the FDV0620 series, specifically designed for power supply applications requiring high efficiency and compactness. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% (indicated by 'M') | | **DC Resistance (DCR)** | ~5.4 mΩ (Max) | | **Rated Current (Isat)** | ~14.1 A (Saturation Current) | | **Rated Current (Itemp)** | ~10.4 A (Temperature Rise Current) | | **Dimensions** | 7.4mm x 6.7mm x 2.0mm (LxWxH) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Breakdown of the Part Number Understanding the nomenclature helps identify the physical and electrical characteristics: * **FDV0620**: The Series name. "0620" typically refers to the footprint size (approx. 6mm width) and height (approx. 2.0mm). * **-H**: Indicates the specific design variation (often relating to automotive or high-reliability standards). * **-R68**: Represents the Inductance value. **R68** translates to **0.68 µH**. * **M**: The tolerance code. **M** stands for **±20%**. --- ### 3. Core Features and Construction * **Metal Alloy Core:** Unlike traditional ferrite inductors, this uses a metal powder core. This provides a "soft saturation" characteristic, meaning the inductance drops gradually as current increases rather than dropping off sharply. * **Shielded Construction:** The part is magnetically shielded to minimize Electromagnetic Interference (EMI), which is critical for densely packed circuit boards. * **Low Profile:** At only 2.0mm height, it is ideal for slim electronic devices like laptops, tablets, and low-profile DC-DC converters. * **AEC-Q200 Qualified:** These parts are often rated for automotive use, ensuring high durability against vibration and thermal shock. --- ### 4. Common Applications Due to its high current handling and low DCR, this inductor is commonly used in: 1. **DC-DC Converters:** Serving as the energy storage element in buck or boost regulators. 2. **CPU/GPU Power Supplies:** Used in Voltage Regulator Modules (VRMs) for high-performance processors. 3. **Automotive Electronics:** Infotainment systems and ADAS sensors. 4. **Mobile Devices:** Battery-powered equipment where efficiency and space are a priority. ---