The **XFHCL4MB-R56M** is a high-performance **Shielded Power Inductor**, commonly used in DC-DC converter applications and power management modules. It is designed to handle high currents while maintaining a compact surface-mount (SMD) footprint. --- ## 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical properties: | Parameter | Value | Description | | :--- | :--- | :--- | | **Inductance** | 0.56 µH | The nominal inductance at 100kHz. | | **Tolerance** | ±20% (M) | The allowable variance in inductance. | | **DC Resistance (DCR)** | ~1.6 - 2.0 mΩ | Typical resistance to minimize power loss. | | **Saturation Current ($I_{sat}$)** | ~25A - 32A | The current at which inductance drops by 30%. | | **Heating Current ($I_{rms}$)** | ~18A - 22A | The current causing a 40°C temperature rise. | | **Shielding** | Magnetic Shielded | Reduces EMI/EMC interference. | --- ## 2. Key Features and Construction ### Material Composition * **Metal Alloy Core:** Unlike traditional ferrite cores, these parts often use a molded metal powder core. This allows for **soft saturation** characteristics, meaning the inductance doesn't drop abruptly when current increases. * **Flat Wire Technology:** Many inductors in this series use flat copper wire to reduce the DCR and improve efficiency at high frequencies. ### Benefits 1. **Low Profile:** Designed for slim electronic devices like laptops or tablets. 2. **High Efficiency:** Low DCR minimizes heat generation during operation. 3. **EMI Suppression:** The shielded construction prevents magnetic flux from interfering with nearby sensitive components. --- ## 3. Common Applications The XFHCL4MB-R56M is typically found in high-demand power circuits: * **Voltage Regulator Modules (VRMs):** Found on motherboards and GPU cards to step down voltage for CPUs. * **DC-DC Converters:** Used in point-of-load (POL) power supplies. * **Battery Powered Devices:** Optimized for high-efficiency power stages to extend battery life. * **Automotive Electronics:** Used in infotainment and ADAS systems (if AEC-Q200 qualified). --- ## 4. Footprint and Mounting The "4MB" in the part number usually refers to the physical package size (e.g., approximately 4.0mm x 4.0mm). It is an **SMD (Surface Mount Device)** component, requiring reflow soldering onto a PCB. ```yaml Package_Type: SMD/SMT Dimensions: Approx 4.4 x 4.2 x 2.0 mm (varies by specific manufacturer) Terminals: Lead-free (RoHS Compliant) ```