The **HPC104N-R56MTR** is a high-performance, surface-mount (SMD) power inductor. This component is specifically designed for high-current power supplies, voltage regulator modules (VRMs), and DC-DC converters where efficiency and high-frequency stability are critical. --- ### 1. Key Technical Specifications The part number can be decoded to understand its physical and electrical characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Inductance** | 0.56 µH (R56) | Measured at 100kHz, 1V | | **Tolerance** | ±20% (M) | Standard tolerance for power inductors | | **Size Code** | 104 | Refers to dimensions (~10mm x 10mm) | | **DC Resistance (DCR)** | ~1.5 - 2.0 mΩ | Extremely low to minimize power loss | | **Saturation Current ($I_{sat}$)** | ~25A - 32A | Point where inductance drops significantly | | **Heat Rating Current ($I_{rms}$)** | ~20A - 28A | Maximum continuous current based on temperature rise | --- ### 2. Physical Construction and Features The HPC series (High Power Choke) utilizes specific materials and shielding techniques to perform in harsh electronic environments: * **Shielded Construction:** The inductor is magnetically shielded. This prevents electromagnetic interference (EMI) from leaking out and affecting nearby sensitive components on the PCB. * **Molded Powder Core:** Usually constructed from a metallic powder core (often iron-based). This allows for "soft saturation" characteristics, meaning the inductance doesn't drop off instantly when current spikes. * **Flat Wire Technology:** Many high-current inductors in this class use flat copper wire instead of round wire. This increases the surface area, reducing the **Skin Effect** at high frequencies and lowering DCR. --- ### 3. Application Use Cases The HPC104N-R56MTR is typically found in the following circuits: 1. **Motherboards & Servers:** Used in the Vcore power phase for CPUs and GPUs where low voltage but very high current is required. 2. **DC-DC Buck Converters:** Acts as the energy storage element in step-down converters. 3. **Industrial Power Supplies:** Used in high-reliability power modules for telecommunications and networking gear. --- ### 4. Part Number Breakdown `HPC` `104` `N` - `R56` `M` `T` `R` * **HPC:** Series Name (High Power Inductor). * **104:** Dimensions (approx. 10.0 x 10.0 x 4.0 mm). * **N:** Material/Designator (often indicates Lead-Free/RoHS). * **R56:** Inductance value ($0.56$ microhenries). * **M:** Tolerance ($\pm20\%$). * **T:** Packaging (Tape & Reel). * **R:** Standard/Revision code. ---