The **ASPI-0840-R90** is a high-power, surface-mount (SMD) shielded inductor manufactured by Abracon. It is designed for applications requiring high efficiency and reliability in power conversion circuits. --- ## 1. Technical Specifications The part number follows a specific nomenclature where **R90** represents the inductance value. | Parameter | Value | | :--- | :--- | | **Inductance** | 0.90 µH | | **Tolerance** | ±20% (M) | | **DC Resistance (DCR)** | ~1.6 mΩ (Max) | | **Saturation Current (Isat)** | ~25.0 A | | **Temperature Rise Current (Irms)** | ~20.0 A | | **Operating Temperature** | -40°C to +125°C | | **Dimensions (LxWxH)** | 8.0 x 8.0 x 4.0 mm | --- ## 2. Key Physical Features ### Magnetic Shielding The inductor is shielded, which means the magnetic flux is contained within the component. This is critical for: * **Low EMI:** Reducing electromagnetic interference with neighboring components. * **High Density:** Allowing parts to be placed closer together on a PCB. ### Construction * **Core Material:** Typically a metal alloy powder which provides high saturation characteristics compared to standard ferrite. * **Flat Wire Technology:** Often uses flat copper wire to minimize DC resistance (DCR) and improve thermal performance. --- ## 3. Common Applications Due to its high current handling and low inductance (0.90 µH), it is primarily used in: * **DC-DC Converters:** Specifically Buck, Boost, and SEPIC topologies. * **Voltage Regulator Modules (VRM):** For CPUs and GPUs in computing. * **Power Supplies:** High-efficiency switch-mode power supplies (SMPS). * **Industrial Electronics:** Compact power modules for automation. --- ## 4. Part Number Breakdown The nomenclature can be decoded as follows: * **ASPI:** Abracon Series (Power Inductor). * **0840:** Dimensions (approx. 8mm x 8mm footprint, 4mm height). * **R90:** Inductance value (R represents the decimal point = 0.90 µH).