The **HCM0703-R82-R** is a high-current, automotive-grade power inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the HCM series, designed specifically to meet the high-density and high-temperature requirements of modern electronic circuits. --- ### 1. Key Technical Specifications The part number itself follows a specific nomenclature that defines its physical and electrical characteristics. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 13.0 Amperes | | **Saturation Current (Isat)** | 17.0 Amperes | | **DC Resistance (DCR)** | 6.5 mΩ (Nominal) | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 7.4mm x 7.0mm x 3.0mm | --- ### 2. Construction and Materials The "HCM" series is known for its **powder iron core technology**. This construction offers several advantages over traditional ferrite cores: * **Magnetically Shielded:** The molded construction minimizes Electromagnetic Interference (EMI), which is critical in compact PCB layouts. * **Soft Saturation:** Unlike ferrite inductors that drop inductance sharply when current limits are exceeded, this part has a "soft" saturation curve, maintaining better performance during current spikes. * **Low Core Loss:** Optimized for high-frequency switching power supplies. --- ### 3. Common Applications Due to its high current handling and small footprint, the HCM0703-R82-R is typically found in: 1. **Voltage Regulator Modules (VRM):** Used in CPU/GPU power delivery. 2. **DC-DC Converters:** Point-of-Load (POL) converters in automotive or industrial electronics. 3. **Battery Powered Systems:** Where high efficiency and low DCR are required to extend battery life. 4. **Automotive Infotainment:** Qualified for rugged environments (AEC-Q200 compliant variations exist). --- ### 4. Part Number Breakdown Understanding the code helps in selecting alternatives: * **HCM:** Series name (High Current Inductor). * **0703:** Dimensions (Approx. 7mm x 7mm, 3mm height). * **R82:** Inductance value ($0.82 \mu H$). * **-R:** RoHS compliant. ---