The **HCM1A0703-R10-R** is a high-current, automotive-grade power inductor manufactured by **Eaton** (formerly Bussmann). It is specifically designed to meet the rigorous demands of automotive electronics, offering high reliability and efficient power conversion. --- ### 1. Key Technical Specifications | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 0.10 µH (R10) | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 32.0 Amperes | | **Saturation Current (Isat)** | 52.0 Amperes | | **DC Resistance (DCR)** | 1.2 mΩ (Typical) / 1.5 mΩ (Max) | | **Operating Temperature** | -55°C to +155°C | | **Package / Case** | 0703 (approx. 7.4mm x 7.0mm x 3.0mm) | | **Standard** | AEC-Q200 Grade 1 Qualified | --- ### 2. Core Features and Construction * **Molded Construction:** The inductor uses a metal powder molding technology. This provides a "soft saturation" characteristic, meaning the inductance drops gradually rather than abruptly as current increases. * **Shielded Design:** The molded body acts as a magnetic shield, minimizing Electromagnetic Interference (EMI) which is critical in dense automotive PCB layouts. * **High Thermal Stability:** Designed to operate in environments up to 155°C, making it suitable for under-the-hood applications. * **Low DCR:** The very low direct current resistance (1.2 mΩ) minimizes power loss and heat generation, leading to higher efficiency in voltage regulator modules. --- ### 3. Applications Due to its high current handling and low profile, the HCM1A0703-R10-R is commonly used in: 1. **Automotive Systems:** ADAS (Advanced Driver Assistance Systems), infotainment, and body electronics. 2. **DC-DC Converters:** Voltage Regulator Modules (VRMs) for high-speed microprocessors. 3. **Power Supplies:** High-current buck, boost, and multi-phase regulators. 4. **Industrial:** Battery-powered devices and high-reliability industrial controllers. --- ### 4. Part Number Breakdown The part number follows a specific nomenclature: * **HCM1A:** Product Series (High Current Automotive Grade Inductor). * **0703:** Physical size (7.4mm x 7.0mm x 3.0mm). * **R10:** Inductance value (R represents the decimal point; R10 = 0.10 µH). * **-R:** RoHS compliant.