The **XFHCL4MM-R47M** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converter circuits. It belongs to a category of "molded" inductors known for their stability and compact size. --- ### 1. Part Number Breakdown The nomenclature typically follows these specifications: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **XF** | Manufacturer Series | Often associated with XFMRS or similar high-frequency component specialists. | | **CL4MM** | Package/Size | Denotes the physical footprint (approx. 4mm x 4mm). | | **R47** | Inductance Value | **0.47 µH** (The 'R' acts as a decimal point). | | **M** | Tolerance | **±20%** (Standard for power inductors). | --- ### 2. Key Technical Specifications While exact datasheets can vary slightly by manufacturer, the standard parameters for a 4mm 0.47µH molded inductor are: * **Inductance:** 0.47 µH * **DC Resistance (DCR):** Extremely low (typically < 10-15 mΩ) to minimize power loss. * **Saturation Current ($I_{sat}$):** High capacity (often 5A to 10A+), meaning it maintains inductance even under high load. * **Operating Temperature:** Generally rated for -40°C to +125°C. * **Construction:** Shielded, composite powder molding. --- ### 3. Core Features and Benefits * **Magnetic Shielding:** The molded construction naturally shields the component, reducing Electromagnetic Interference (EMI) with neighboring components. * **High Current Density:** Designed to handle large current spikes without core saturation. * **Compact Footprint:** The 4mm size is optimized for high-density PCB layouts in portable electronics. * **Low Acoustic Noise:** The solid molded body reduces the "buzzing" (magnetostriction) often heard in traditional wire-wound inductors. --- ### 4. Common Applications This part is typically found in: 1. **Voltage Regulator Modules (VRM):** Providing stable power to CPUs and GPUs. 2. **Point of Load (POL) Converters:** Used in telecommunications and data centers. 3. **Battery Powered Devices:** Smartphones, tablets, and laptops where efficiency is critical. 4. **DC/DC Buck Converters:** Acts as the energy storage element in switching power supplies. ---