The **LC10-R47** is a high-current, surface-mount (SMD) power inductor commonly used in voltage regulator modules (VRMs) and DC-DC converters. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Overview The part belongs to the **LC10 series** (typically manufactured by companies like Delta Electronics or Cyntec). It is designed for high-frequency power electronics where high efficiency and low electromagnetic interference (EMI) are required. ### 2. Technical Specifications The "R47" in the part number denotes the inductance value. | Parameter | Specification | Note | | :--- | :--- | :--- | | **Inductance** | 0.47 µH | "R" acts as a decimal point | | **Tolerance** | ±20% | Typical for power inductors | | **DC Resistance (DCR)** | ~0.70 to 1.10 mΩ | Extremely low to minimize heat | | **Saturation Current ($I_{sat}$)** | ~40A to 60A | Current at which inductance drops 20-30% | | **Heating Current ($I_{rms}$)** | ~30A to 45A | Current causing a 40°C temperature rise | | **Operating Temperature** | -40°C to +125°C | Includes self-heating | --- ### 3. Core Features * **Molded Construction:** The inductor uses a metallic powder core technology. This provides a "soft saturation" characteristic, meaning the inductance doesn't drop abruptly when current increases. * **Shielded Design:** The molded body acts as a magnetic shield, reducing EMI and cross-talk with neighboring components on the PCB. * **High Frequency Performance:** Optimized for switching frequencies ranging from 500 kHz to over 2 MHz. --- ### 4. Typical Applications The LC10-R47 is most frequently found in: 1. **Motherboards/Servers:** Part of the multi-phase VRM powering the CPU or GPU. 2. **Point of Load (POL) Converters:** Used in high-current 12V to 1.xV step-down circuits. 3. **Graphic Cards:** Managing power delivery for high-performance memory and cores. --- ### 5. Identification (The Marking Code) The part number can be decoded as follows: * **LC:** Series name (Low-profile/High-current). * **10:** Physical size (e.g., approximately 10mm x 11mm footprint). * **R47:** Inductance value ($0.47 \times 10^0$ microhenries). ---