The **HCMA0703-R68-R** is a high-current power inductor designed specifically for automotive and industrial applications where reliability and efficiency are critical. It belongs to the HCMA series manufactured by Eaton (formerly Coiltronics). --- ### 1. Technical Specifications Below are the primary technical parameters for this specific part number: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.68 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 4.5 mΩ (Typical) / 5.2 mΩ (Max) | | **Rated Current (Irms)** | 15.5 Amps | | **Saturation Current (Isat)** | 21.0 Amps | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 0703 (approx. 7.4 x 7.0 x 3.0 mm) | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying its physical and electrical characteristics: * **HCMA**: High Current Automotive series. * **0703**: Physical size (7.4mm length x 7.0mm width x 3.0mm height). * **R68**: Inductance value (R denotes decimal point; $0.68\mu H$). * **R**: RoHS compliant. --- ### 3. Key Features * **AEC-Q200 Qualified:** This is a crucial rating for automotive grade components, ensuring the part can withstand high vibration, thermal shock, and mechanical stress. * **Shielded Construction:** It features magnetic shielding to minimize Electromagnetic Interference (EMI), which is vital for densely packed circuit boards. * **High Saturation Current:** The inductor can handle high peak currents without the inductance dropping significantly, preventing circuit instability. * **Low Core Loss:** Designed for high-frequency DC-DC converters to maintain high energy efficiency. --- ### 4. Common Applications Due to its robust nature, the HCMA0703-R68-R is typically used in: 1. **Automotive Modules:** Engine control units (ECUs), ADAS sensors, and infotainment systems. 2. **Voltage Regulator Modules (VRMs):** Providing stable power to microprocessors and FPGAs. 3. **DC-DC Converters:** Buck, boost, or SEPIC topologies in industrial power supplies. 4. **LED Lighting:** Constant current drivers for high-brightness LEDs. ---