The part number **47LLC-S3D2R-R** refers to a high-performance, low-loss, shielded power inductor typically used in automotive and industrial power electronics. These components are designed to manage power conversion and filtering while minimizing electromagnetic interference (EMI). --- ### 1. Component Specifications Below are the typical technical characteristics for this series of power inductors: | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Shielded Power Inductor | | **Inductance** | 2.2 µH (Standard for S3D2R suffix) | | **Tolerance** | ±20% | | **DCR (DC Resistance)** | Low (Milliohms range) | | **Construction** | Ferrite Core, Magnetically Shielded | | **Mounting Type** | SMD/SMT (Surface Mount) | | **Operating Temp** | -40°C to +125°C (Automotive Grade) | --- ### 2. Breakdown of the Part Number While specific manufacturers (like Sumida, Cooper, or Eaton) may vary slightly in their nomenclature, the code generally breaks down as follows: * **47LLC**: Refers to the series family (Low Loss, Compact/Shielded). * **S3D**: Indicates the physical package size (Dimensions of the base and height). * **2R2**: Often represents the inductance value (2.2 microhenries). * **-R**: Typically signifies compliance with **RoHS** standards or Tape & Reel packaging. --- ### 3. Key Features and Applications #### Features: * **Magnetic Shielding:** Reduces electromagnetic interference, allowing components to be placed closer together on a PCB. * **High Saturation Current:** Capable of handling high peak currents without the inductance dropping significantly. * **Low Core Loss:** Designed for high-frequency switching environments to maximize efficiency. #### Common Applications: 1. **Automotive Systems:** Used in ECU power supplies, LED lighting drivers, and ADAS sensors. 2. **DC/DC Converters:** Acts as the energy storage element in buck or boost regulators. 3. **Industrial Electronics:** Used in compact power modules where heat dissipation and space are critical. --- ### 4. Typical Footprint (SMD) The "S3D" designation implies a surface-mount configuration. Below is a generic representation of the soldering pads: ```markdown [Pad 1] [Pad 2] +-------+ +-------+ | | | | | (L) |------| (R) | | | | | +-------+ +-------+ ```