The **MHCI04012-R47M-R8** is a specific part number for a high-performance **Surface Mount Device (SMD) Power Inductor**. These components are typically used in power management circuits to provide high current handling and energy storage in a compact form factor. --- ## 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **MHCI** | Series Name | High-current, molded power inductor series. | | **04012** | Dimensions | Approx. 4.0mm x 4.0mm footprint, 1.2mm height. | | **R47** | Inductance Value | **0.47 µH** (Microhenries). | | **M** | Tolerance | **±20%** tolerance on the inductance value. | | **R8** | Specific Revision | Internal manufacturer code or design revision. | --- ## 2. Key Technical Specifications While exact specs can vary slightly by manufacturer (like Chilisin or Cyntec), typical parameters for this part include: ### Electrical Characteristics * **Inductance:** 0.47 µH. * **DC Resistance (DCR):** Extremely low (typically in the range of 10-20 mΩ) to minimize power loss. * **Saturation Current ($I_{sat}$):** High capacity (often 5A to 10A range) before inductance drops significantly. * **Rated Current ($I_{rms}$):** The continuous current allowed based on a specific temperature rise (usually 40°C). ### Physical Characteristics * **Shielding:** Shielded construction (Molded type) to minimize Electromagnetic Interference (EMI). * **Material:** Metal alloy powder core, which offers better saturation performance compared to traditional ferrite. --- ## 3. Applications and Use Cases Because of its low profile (1.2mm) and high current capability, this inductor is commonly found in: 1. **DC-DC Converters:** Voltage regulation modules (VRM) for CPUs and GPUs. 2. **Mobile Electronics:** Smartphones, tablets, and wearable tech where space is limited. 3. **Laptops/PCs:** Power rails for SSDs and memory modules. 4. **Distributed Power Systems:** Point-of-Load (POL) converters. --- ## 4. Typical Footprint (Example) ```text 4.0mm +---------+ | | | [ 470 ] | 4.0mm | | +---------+ (Height: 1.2mm) ```