The **SDL1108P-R30MF** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converters and voltage regulator modules (VRMs). It belongs to a category of "Molded Power Inductors," known for their excellent magnetic shielding and high power density. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electronic characteristics: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.30 µH (indicated by "R30") | | **Tolerance** | ±20% (indicated by "M") | | **Case Size** | Approx. 11.0 x 8.0 mm (Series 1108) | | **Core Material** | Alloy Powder (Carbonyl Iron or similar) | | **Shielding** | Magnetically Shielded (Molded construction) | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### 2. Key Electronic Features * **High Saturation Current ($I_{sat}$):** Due to the composite metal powder core, these inductors handle high peak currents without a sharp drop in inductance. This is known as "soft saturation." * **Low DCR (DC Resistance):** Designed with thick copper wire to minimize power loss and heat generation, improving overall circuit efficiency. * **Low Acoustic Noise:** The molded construction minimizes "coil whine" caused by magnetostriction, making it ideal for consumer electronics. * **EMI Suppression:** The shielded design ensures that magnetic flux leakage is minimized, reducing electromagnetic interference with surrounding components. --- ### 3. Application Use-Cases The SDL1108P-R30MF is typically found in high-demand power stages: 1. **CPU/GPU Power Supplies:** Used in multi-phase VRMs for servers and high-end gaming laptops. 2. **Point of Load (POL) Converters:** Providing stable low-voltage, high-current power to FPGAs and ASICs. 3. **Battery Powered Devices:** High efficiency helps extend battery life in portable industrial equipment. --- ### 4. Typical Footprint and Structure ```text [ Top View ] [ Side View ] ___________________ _______________ | | | | | (Marking) | | Molded | | R30 | | Body | |___________________| |_______________| [ Terminals ] [ Lead Frame ] ```