The **SCIH1040HC-R82M** is a high-performance, surface-mount (SMD) power inductor. This component is part of the **SCIH1040HC** series, commonly used in high-current power management applications such as DC-DC converters. --- ### 1. Key Technical Specifications The part number follows a standard nomenclature used by manufacturers (like Signal or generic equivalents) to define its electrical characteristics. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% (indicated by 'M') | | **Case Size** | 1040 (Approx. 10mm x 10mm x 4mm) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Core Material** | Iron Powder / Carbonyl (Shielded) | --- ### 2. Breakdown of the Part Number The alphanumeric code can be decoded as follows: * **SCIH**: Series identifier (Shielded High Current Inductor). * **1040**: Physical dimensions (10.0mm x 10.0mm footprint, 4.0mm height). * **HC**: High Current series designation. * **R82**: Inductance value (R = decimal point; R82 = 0.82 microhenries). * **M**: Tolerance (M = ±20%). --- ### 3. Electrical Characteristics & Performance This specific inductor is designed for "hard-working" power circuits. Its primary advantages include: * **Saturation Current ($I_{sat}$):** These inductors typically handle very high peak currents (often exceeding 20A–30A for this value) before the inductance drops significantly. * **DC Resistance (DCR):** Because it is a "High Current" model, it features very low DCR to minimize power loss and heat generation. * **Shielding:** The "SCIH" series is magnetically shielded, which reduces Electromagnetic Interference (EMI) with surrounding components on the PCB. * **Soft Saturation:** Unlike ferrite cores that drop inductance sharply, the composite/powder materials used here usually offer a "soft" saturation curve, making the power supply more stable under heavy loads. --- ### 4. Common Applications Due to its low inductance (0.82µH) and high current capacity, this part is ideal for: 1. **Voltage Regulator Modules (VRMs):** Found in motherboards and GPU power stages. 2. **Point of Load (POL) Converters:** High-efficiency DC-DC buck converters. 3. **Battery Powered Systems:** Where low heat and high efficiency are critical. 4. **Servers and Networking:** High-power density power supplies. --- ### 5. Footprint (Mechanical Data) ```text [ 10.0 mm ] +---------------+ | | | (R82) | [ 10.0 mm ] | | +---------------+ [ 4.0 mm ] <-- Height Profile ``` ---