The **47NLR-5R-R** is a specific surface-mount power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the **MPI4040** series, which is characterized by high current handling and a low-profile molded construction. --- ## 1. Technical Specifications The following table highlights the core electrical and physical parameters of the 47NLR-5R-R: | Parameter | Specification | | :--- | :--- | | **Inductance** | 4.7 µH (Microhenries) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~70 - 85 mΩ (Max) | | **Rated Current (Irms)** | ~3.0 A to 3.5 A (typical) | | **Saturation Current (Isat)** | ~4.0 A to 4.5 A (typical) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4040 (4.0mm x 4.0mm x 1.2mm to 2.0mm) | | **Termination** | Lead-free, RoHS compliant | --- ## 2. Key Features * **Molded Construction:** The part uses a metal powder core technology. This design allows for "soft saturation" characteristics, meaning the inductance doesn't drop off instantly when current increases. * **Low EMI:** The shielded design minimizes electromagnetic interference, making it ideal for densely packed circuit boards. * **High Power Density:** Because of its composite core, it offers high current capacity relative to its very small footprint. * **Ruggedness:** Excellent resistance to thermal shock and mechanical vibration. --- ## 3. Common Applications This component is typically used in power management stages for modern electronics: 1. **DC-DC Converters:** Buck, Boost, and SEPIC converters. 2. **Portable Electronics:** Smartphones, tablets, and laptops where space is at a premium. 3. **IoT Devices:** Low-power sensors requiring stable voltage regulation. 4. **Distributed Power Systems:** POL (Point-of-Load) regulators for FPGAs or CPUs. --- ## 4. Part Number Breakdown The nomenclature usually follows this logic: * **47:** First two digits of the inductance value. * **NLR:** Series/Material designator (Low Resistance/High Current). * **5R:** Inductance multiplier (4.7 microhenries). * **-R:** RoHS Compliant. ---