## Technical Overview of ASPI-4118S-R22 The **ASPI-4118S-R22** is a surface-mount (SMD) power inductor manufactured by **Abracon**. It is part of the ASPI-4118S series, known for its low profile and high power density. --- ### 1. Key Technical Specifications The following table outlines the core electronic characteristics of this specific component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.22 µH (R22) | | **Tolerance** | ±30% (N) | | **DC Resistance (DCR)** | 4.6 mΩ (Max) | | **Saturation Current (Isat)** | 8.5 A | | **Heating Current (Irms)** | 7.0 A | | **Shielding** | Semi-Shielded (Magnetic Resin) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.0 x 4.0 x 1.8 mm | --- ### 2. Physical Construction The "S" in the part number denotes a **semi-shielded** construction. Unlike fully shielded inductors that use a ferrite drum and sleeve, this part uses: * **Magnetic Resin:** A mixture of ferrite powder and resin is applied to the exterior. * **Benefits:** This reduces EMI (Electromagnetic Interference) while keeping the component smaller and more cost-effective than traditional shielded inductors. * **Low Profile:** With a height of only 1.8mm, it is ideal for slim consumer electronics. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Code Segment | Meaning | | :--- | :--- | | **ASPI** | Abracon Surface Power Inductor | | **4118** | Dimensions (approx. 4.0mm x 4.0mm x 1.8mm) | | **S** | Semi-shielded construction | | **R22** | Inductance value (R represents the decimal: 0.22 µH) | --- ### 4. Typical Applications Due to its high saturation current and low DCR, the ASPI-4118S-R22 is commonly used in: * **DC/DC Converters:** Voltage regulation modules for CPUs and GPUs. * **Portable Devices:** Smartphones, tablets, and wearable tech where space is limited. * **Power Supplies:** High-efficiency buck/boost converters. * **Automotive/Industrial:** Distributed power systems requiring small footprints. ---