The **MLC05-R39M-RC** is a high-performance, surface-mount (SMD) power inductor commonly used in DC-DC converters and power management modules. Below is a detailed breakdown of its technical specifications and characteristics. --- ### 1. Technical Specifications | Parameter | Value | Description | | :--- | :--- | :--- | | **Inductance** | 0.39 µH | The nominal inductance at 100kHz. | | **Tolerance** | ±20% (M) | The allowable variance from the nominal inductance. | | **DCR (Typical)** | ~2.5 mΩ | DC Resistance; lower values reduce power loss. | | **Isat (Saturation)** | ~18 - 22 A | The current at which inductance drops by a specific % (usually 30%). | | **Irms (Rated)** | ~12 - 15 A | The continuous current that causes a 40°C temperature rise. | | **Size Code** | 05 / 5050 | Typically refers to a 5.0 x 5.0 mm footprint. | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying the component family: * **MLC**: Series prefix (typically Molded Low-profile Choke). * **05**: Dimensional code (approx. 5.4mm x 5.2mm footprint). * **R39**: Inductance value (R denotes decimal; 0.39 microhenries). * **M**: Tolerance code (±20%). * **RC**: RoHS Compliant. --- ### 3. Key Features * **Magnetic Shielding:** The molded construction provides excellent magnetic shielding, reducing Electromagnetic Interference (EMI) with neighboring components. * **High Current Density:** Designed to handle high saturation currents in a small physical volume. * **Low Core Loss:** Uses metal alloy powder cores which offer better efficiency at high frequencies compared to traditional ferrite cores. * **Stability:** Maintains stable performance across a wide temperature range (typically -40°C to +125°C). --- ### 4. Common Applications This specific inductor is ideal for high-speed switching power supplies: 1. **GPU/CPU Power:** VRM (Voltage Regulator Modules) for processors. 2. **Point of Load (POL):** Converters on motherboards and industrial PCs. 3. **Battery Powered Devices:** High-efficiency power stages in tablets or laptops. 4. **Automotive Electronics:** Infotainment and ADAS power rails (if AEC-Q200 qualified). ---