SMD inductors (Surface Mount Inductors) are miniaturized passive components designed for modern electronic devices, which are soldered directly onto printed circuit boards (PCBs) using Surface Mount Technology (SMT), eliminating the need for through-hole mounting. The core is usually composed of magnetic materials (such as ferrite, metal alloy powder) or empty core wirewound, and is precision wound or multilayer ceramic stacked to achieve a specific inductance value (ranging from nanohenry nH to millihenry mH). SMD inductors are known for their miniature package sizes (e.g., 0402, 0603, 0805, etc.), as well as their low direct current resistance (DCR), high current ratings, and excellent high-frequency characteristics (operating frequency up to the GHz level). With low DC resistance (DCR), high current ratings and excellent high frequency characteristics (operating frequency up to GHz level), they are widely used in power management modules (e.g., DC-DC converters, LDO voltage regulators), RF circuits (e.g., 5G communication, Wi-Fi modules), consumer electronics (smartphones, laptops), and automotive electronics (ADAS, in-vehicle infotainment systems), and other fields. Compared with traditional plug-in inductors, their advantages include high space utilization, compatibility with automated production, and resistance to mechanical vibration. Meanwhile, magnetic shielding design (e.g., closed magnetic circuit structure) can effectively inhibit electromagnetic interference.