The **XFHCL4MM-R82M** is a high-performance, shielded fixed inductor commonly used in power management circuits. It belongs to a category of surface-mount (SMD) power inductors designed for high-frequency applications where efficiency and compact size are critical. --- ### 1. Technical Specifications The following table outlines the primary electrical and physical characteristics based on standard industry data for this series: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% (indicated by 'M') | | **DCR (Direct Current Resistance)** | Low (typically < 10 mΩ) | | **Saturation Current (Isat)** | High (designed for peak power spikes) | | **Shielding** | Magnetically Shielded | | **Mounting Type** | Surface Mount Device (SMD/SMT) | | **Operating Temp** | -40°C to +125°C (Standard range) | --- ### 2. Breakdown of the Part Number While naming conventions vary slightly by manufacturer (such as XFMRS), the alphanumeric code generally breaks down as follows: * **XF / XFHCL**: The Series designation, usually indicating a high-current, low-profile power inductor. * **4MM**: Refers to the physical dimensions (likely 4.0mm x 4.0mm footprint). * **R82**: The Inductance value. The 'R' acts as a decimal point. `R82` = 0.82 microhenries (µH). * **M**: The tolerance code. `M` represents ±20%. --- ### 3. Key Features & Applications #### Features * **Low Core Loss:** Optimized for high-frequency switching. * **Magnetic Shielding:** Minimizes Electromagnetic Interference (EMI) with neighboring components on the PCB. * **Low Profile:** Ideal for thin electronic devices like tablets and smartphones. #### Common Applications 1. **DC-DC Converters:** Used in "Buck" or "Boost" converters to store energy. 2. **Voltage Regulator Modules (VRM):** Found near CPUs and GPUs to stabilize power delivery. 3. **Portable Electronics:** Used in battery-powered devices requiring high efficiency. 4. **Automotive Infotainment:** Suitable for compact power supply units in cars. --- ### 4. Circuit Symbol and Implementation In a schematic, this component is represented by the standard inductor symbol. It is typically placed in the output stage of a switching power supply. ```spice * Typical Application: Buck Converter Output * [Input Voltage] --- [Switching MOSFET] --- [XFHCL4MM-R82M] --- [Vout] | [Output Capacitor] | [GND] ```