The **HCF1007-1R0-R** is a high-current, power inductor manufactured by Eaton (formerly Cooper Bussmann). It belongs to the HCF1007 series, which is designed for high-frequency energy storage and filtering in DC-DC converters. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the HCF1007-1R0-R: | Parameter | Value | | :--- | :--- | | **Inductance** | $1.0\ \mu\text{H}$ | | **Tolerance** | $\pm 20\%$ | | **Rated Current ($I_{rms}$)** | $31\ \text{A}$ (Temperature rise based) | | **Saturation Current ($I_{sat}$)** | $35\ \text{A}$ (Inductance drop based) | | **DC Resistance (DCR)** | $1.75\ \text{m}\Omega$ (Typical) | | **Operating Temperature** | $-40^\circ\text{C}$ to $+125^\circ\text{C}$ | | **Package/Case** | Surface Mount (SMD) - $10.3 \times 7.0 \times 6.4\ \text{mm}$ | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **HCF**: High Current, Ferrite Core series. * **1007**: Dimensions (approx. $10\ \text{mm} \times 7\ \text{mm}$). * **1R0**: Inductance value ($1.0\ \mu\text{H}$). The "R" acts as a decimal point. * **-R**: RoHS compliant. --- ### 3. Core Features and Construction * **Ferrite Core Material:** This material ensures low core losses at high frequencies, making it more efficient than powdered iron cores in specific switching applications. * **High Current Handling:** Due to its low DCR ($1.75\ \text{m}\Omega$), it can handle up to $31\ \text{A}$ without excessive self-heating. * **Shielded Design:** The construction provides effective EMI (Electromagnetic Interference) shielding, which is critical for noise-sensitive electronics. * **Flat Wire Technology:** It often utilizes flat wire windings to maximize the cross-sectional area, reducing the "Skin Effect" and keeping the DCR low. --- ### 4. Typical Applications The HCF1007-1R0-R is commonly found in: 1. **Voltage Regulator Modules (VRM):** Used in CPUs and GPUs to provide stable power. 2. **Point-of-Load (POL) Converters:** High-efficiency power supplies located near the load. 3. **Telecom/Datacom:** Powering routers, switches, and base stations. 4. **Distributed Power Systems:** Industrial and server-grade power distribution. ---