The **PIC10040-R47M** is a high-current, shielded power inductor typically used in DC-DC converter applications. It is designed for high-density power supplies due to its compact size and high efficiency. --- ### 1. General Specifications The part number follows a standard naming convention used by many manufacturers (like Cyntec or similar power component specialists). | Feature | Specification | | :--- | :--- | | **Inductance** | 0.47 µH (Microhenries) | | **Tolerance** | ±20% (indicated by 'M') | | **Dimensions** | 10.0 x 11.5 x 4.0 mm (approx.) | | **Type** | Surface Mount (SMD) | | **Construction** | Shielded Molded Inductor | --- ### 2. Electrical Characteristics These values are critical for determining the inductor's performance under load: * **Saturation Current ($I_{sat}$):** This is the current level at which the inductance drops (usually by 20-30%). For a 0.47µH inductor of this size, it typically handles **25A to 35A**. * **Heating Current ($I_{rms}$):** The continuous current that causes a 40°C temperature rise. Usually matches or is slightly lower than $I_{sat}$. * **DC Resistance (DCR):** Extremely low, typically in the range of **1.5mΩ to 3.0mΩ**. Low DCR is vital for reducing power loss and heat generation. --- ### 3. Key Features & Materials * **Molded Construction:** The coil is embedded in a metallic powder composite. This provides a "soft saturation" characteristic, meaning the inductance doesn't drop off instantly when the current limit is reached. * **Magnetic Shielding:** The design naturally contains the magnetic field, reducing Electromagnetic Interference (EMI) with nearby components. * **High Frequency:** Optimized for high-frequency switching regulators (up to several MHz). --- ### 4. Typical Applications The PIC10040-R47M is commonly found in: 1. **Voltage Regulator Modules (VRM):** For CPUs and GPUs in laptops and desktops. 2. **Point of Load (POL) Converters:** High-current power rails in networking equipment. 3. **Battery Powered Devices:** Where high efficiency and small footprint are required.