The **HCM0703-R47-R** is a high-current, shielded power inductor part of the HCM0703 series manufactured by **Eaton (formerly Coiltronics)**. It is specifically designed for high-frequency DC-DC converters and voltage regulator modules (VRMs). ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Inductance Tolerance** | ±20% | | **Current Rating (Irms)** | 17.5 A (Typical) | | **Saturation Current (Isat)** | 26.0 A (Typical) | | **DC Resistance (DCR)** | 3.5 mΩ (Max) | | **Operating Temperature** | -55°C to +125°C | | **Self-Resonant Frequency** | 60 MHz | | **Dimensions (L x W x H)** | 7.3 x 7.0 x 3.0 mm | --- ### 2. Key Features * **Magnetically Shielded:** The part features an iron powder core construction. This minimizes electromagnetic interference (EMI) and prevents magnetic flux from leaking and affecting surrounding components. * **Low Core Loss:** Optimized for high-frequency power conversion (up to 5 MHz), making it efficient for modern power supplies. * **High Current Density:** Despite its small footprint (7x7mm), it can handle high peak currents without saturating prematurely. * **RoHS Compliant:** Leads are finished with matte tin over copper, making them environmentally friendly and compatible with lead-free soldering processes. --- ### 3. Part Number Breakdown The part number follows a specific nomenclature used by Eaton: * **HCM:** Series name (High Current Inductor). * **0703:** Physical size (approx. 7mm x 7mm footprint, 3mm height). * **R47:** Inductance value ($R$ acts as a decimal point, so $0.47\mu H$). * **-R:** RoHS compliance suffix. --- ### 4. Common Applications Due to its low DCR and high saturation levels, this inductor is commonly found in: * **Multi-phase Regulators:** Used in CPU/GPU power delivery for servers and laptops. * **DC-DC Converters:** Point-of-load (POL) modules. * **Battery Powered Systems:** Where high efficiency is required to extend battery life. * **Automotive Electronics:** Infotainment and lighting control units.