The **PWHM1010-R100** is a high-current, surface-mount (SMD) Power Inductor. These components are critical in modern electronics for energy storage and noise filtering, particularly in high-frequency power conversion circuits. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the technical characteristics: | Parameter | Specification (Typical) | | :--- | :--- | | **Inductance** | 0.10 µH (indicated by "R100") | | **Tolerance** | ±20% | | **Case Size** | 1010 (approx. 10mm x 10mm) | | **Material** | Metal Alloy / Carbonyl Powder | | **Current Rating (Isat)** | High (typically 30A - 60A+) | | **DCR (DC Resistance)** | Ultra-low (typically < 1.0 mΩ) | --- ### 2. Physical Construction The "PWHM" series typically utilizes a **Molded Inductor** construction. This involves: * **Winding:** A heavy-gauge copper wire coil. * **Magnetic Core:** The coil is encapsulated in a metallic powder (iron/alloy) mixed with resin. * **Shielding:** The molded design provides "magnetic shielding," which reduces Electromagnetic Interference (EMI) with surrounding components. --- ### 3. Electronic Functionality This part serves several vital roles within a circuit: 1. **Energy Storage:** In a DC-DC converter (Buck/Boost), it stores energy in its magnetic field during the "on" cycle and releases it during the "off" cycle. 2. **Ripple Suppression:** Because it has very low inductance (0.10 µH), it is optimized for **very high-frequency switching**, smoothing out current ripples in high-speed power rails. 3. **Low DCR Loss:** The "R100" (0.10 µH) version is designed for high efficiency. Its low DC resistance ensures minimal power is wasted as heat, even when passing high amounts of current. --- ### 4. Common Applications Due to its high current handling and small footprint, the PWHM1010-R100 is commonly found in: * **Graphics Cards (GPUs):** VRM (Voltage Regulator Module) phases. * **Server Motherboards:** High-current CPU power delivery. * **DC-DC Converters:** Point-of-load (POL) modules. * **Industrial Power:** High-density power supplies. --- ### 5. Part Number Breakdown * **PWHM:** Series designation (High-current molded inductor). * **1010:** Dimensions (approx. 10.0 x 10.0 mm). * **R100:** Inductance value ($R = \text{decimal point}$). $0.100\text{ }\mu\text{H}$.