## HCF1007-4R7-R: High-Current Power Inductor The **HCF1007-4R7-R** is a specific surface-mount power inductor manufactured by **Eaton (formerly Coiltronics/Bussmann)**. It belongs to the HCF1007 series, which is designed for high-current applications where space and thermal efficiency are critical. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the component's characteristics: | Code Segment | Meaning | Detail | | :--- | :--- | :--- | | **HCF** | Series Name | High-current ferrite inductor | | **1007** | Size Code | Approx. 10.3mm x 7.0mm footprint | | **4R7** | Inductance Value | 4.7 Microhenries ($\mu H$) | | **-R** | RoHS Compliant | Lead-free and environmentally friendly | --- ### 2. Technical Specifications Below are the typical electrical and physical parameters for this specific part: | Parameter | Value | | :--- | :--- | | **Inductance** | 4.7 $\mu H$ | | **Tolerance** | $\pm$ 20% | | **Isat (Saturation Current)** | ~13.5 A (20% drop in inductance) | | **Irms (Rated Current)** | ~10.5 A (40°C temperature rise) | | **DCR (DC Resistance)** | ~10.2 $m\Omega$ (Typical) | | **Operating Temperature** | -40°C to +125°C | | **Construction** | Ferrite core, shielded | --- ### 3. Key Features * **High Current Density:** Designed to handle significant current without saturating quickly. * **Low DCR:** The low DC resistance minimizes power loss due to heat ($I^2R$ losses), improving overall power supply efficiency. * **Magnetic Shielding:** The design reduces Electromagnetic Interference (EMI), which is vital for densely packed circuit boards. * **Frequency Range:** Optimized for high-frequency switching regulators (up to 2 MHz). --- ### 4. Common Applications This inductor is primarily used in **DC-DC converters** and voltage regulation modules. 1. **Computing:** Multi-phase buck regulators for CPUs and GPUs. 2. **Industrial:** High-current power supplies for automation equipment. 3. **Telecom:** Base station power modules and distributed power systems. 4. **Graphics Cards:** Voltage filtering for high-performance video memory and processors. --- ### 5. Footprint and Mounting The "1007" designation refers to the physical dimensions: * **Length:** ~10.3 mm * **Width:** ~7.0 mm * **Height:** ~6.4 mm * **Mounting:** Surface Mount Device (SMD/SMT)