The part number **47LR-1D0B-R** refers to a high-frequency, surface-mount power inductor, typically manufactured by companies like **Eaton (Bussmann Division)**. It is part of the **47LR series**, designed for high current density and low core loss. --- ### ## Technical Specifications Below are the typical technical parameters for the 47LR-1D0B-R: | Parameter | Value/Specification | | :--- | :--- | | **Inductance** | 1.0 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | Approximately 25A - 30A (Typical) | | **Saturation Current (Isat)** | High (designed for stable performance) | | **DC Resistance (DCR)** | Extremely Low (mΩ range) | | **Package / Case** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +125°C | --- ### ## Key Features * **High Power Density:** Large current handling capability in a compact footprint. * **Low Core Loss:** Optimized for high-frequency switching power supplies. * **Shielded Construction:** Helps minimize Electromagnetic Interference (EMI) to surrounding components. * **RoHS Compliant:** The "-R" suffix indicates the part is compliant with lead-free and environmental regulations. --- ### ## Applications The 47LR series is primarily used in power management circuits where efficiency and space are critical. Common applications include: 1. **Voltage Regulator Modules (VRMs):** Found in PC motherboards and servers. 2. **DC-DC Converters:** Used in telecommunications and industrial equipment. 3. **Graphics Cards (GPUs):** High-current power delivery for processing units. 4. **Point of Load (POL) Converters:** Providing power to FPGAs and microprocessors. --- ### ## Deciphering the Part Number * **47LR:** Series designation (High-current inductor). * **1D0:** Inductance code (1.0 µH). * **B:** Internal design/Revision code. * **R:** RoHS compliant.