The **MF1304T-R82** is a high-current, surface-mount (SMD) power inductor commonly used in DC-DC converter applications. It belongs to a category of molded power inductors designed for high density and high efficiency. --- ## Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% | | **Case Size** | 13.5mm x 12.6mm (Approx.) | | **Height** | 4.0mm (Approx.) | | **Saturation Current (Isat)** | High (typically > 30A depending on mfg) | | **DC Resistance (DCR)** | Extremely Low (typically < 2.0 mΩ) | | **Material** | Metal Alloy / Carbonyl Powder | --- ## Key Characteristics ### 1. Construction The "MF" series typically uses a **metal composite core**. Unlike traditional ferrite cores, these are made by pressing metal powder around the copper coil. This design provides: * **Soft Saturation:** The inductance drops gradually as current increases, rather than dropping sharply. * **Shielded Design:** The molded construction naturally shields the component, reducing Electromagnetic Interference (EMI). ### 2. High Current Capability With an inductance value of **0.82 µH**, this part is optimized for high-frequency switching. The low DCR ensures that power loss (heat) is minimized even when large amounts of current pass through the component. ### 3. Thermal Stability Because of the metal alloy powder, these inductors handle temperature fluctuations better than standard ferrites and are less likely to experience "thermal runaway" in high-power environments. --- ## Common Applications * **Voltage Regulator Modules (VRM):** Used in motherboards and GPU power phases. * **DC-DC Converters:** Point-of-Load (POL) converters for telecommunications and industrial servers. * **Battery Powered Systems:** High-efficiency power management for portable devices. * **Automotive Electronics:** Infotainment and LED lighting drivers (if AEC-Q200 qualified). --- ## Comparison: Ferrite vs. Metal Composite (MF Series) | Feature | Ferrite Inductors | Metal Composite (MF1304T) | | :--- | :--- | :--- | | **Saturation** | Hard / Sudden | Soft / Gradual | | **Acoustic Noise** | Prone to buzzing | Very low (molded) | | **EMI Shielding** | Requires external shield | Inherently shielded | | **Footprint** | Larger for same current | Compact / High density |