Based on the part number provided, the **CSBX1250-R45M** refers to a high-current, shielded surface-mount (SMD) power inductor, typically manufactured by companies like **Coilwisher** or similar power component specialists. These are commonly used in DC-DC converters and high-efficiency power supplies. --- ## Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Inductance** | 0.45 µH (denoted by "R45") | | **Tolerance** | ±20% (denoted by "M") | | **Case Size** | 12.5mm x 12.5mm (approx.) | | **Material Type** | Composite Powder (Iron/Metal Alloy) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Shielding** | Magnetically Shielded | --- ## Key Features & Electronic Properties ### 1. High Saturation Current ($I_{sat}$) Due to the metal alloy powder core, this inductor can handle high peak currents without the inductance dropping off sharply. This is critical for preventing circuit failure during power spikes. ### 2. Low DCR (Direct Current Resistance) The "1250" series is designed with thick copper windings to minimize internal resistance. Lower DCR results in: * Reduced heat generation. * Higher efficiency in power conversion. ### 3. Magnetic Shielding The component is fully encapsulated in a magnetic resin or metal composite. This construction: * Minimizes **Electromagnetic Interference (EMI)**. * Prevents the inductor's magnetic field from affecting neighboring components on a dense PCB. ### 4. Soft Saturation Characteristics Unlike traditional ferrite cores that lose inductance abruptly, the R45M series usually features "soft saturation," meaning it maintains functionality even when the current exceeds rated limits slightly. --- ## Common Applications * **Voltage Regulator Modules (VRM):** Used in motherboards and GPU power phases. * **DC/DC Converters:** High-frequency point-of-load (POL) converters. * **Industrial Power Supplies:** Where high reliability and low noise are required. * **Battery Powered Devices:** Due to high efficiency and compact footprint. ---