The **HCM1707-680-R** is a high-current, automotive-grade power inductor manufactured by **Eaton (formerly Cooper Bussmann)**. It belongs to the HCM series, which is specifically designed to meet the high-density and high-temperature requirements of modern power electronics. --- ### 1. Key Technical Specifications The part number itself reveals specific characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 68 µH (Microhenries) | | **Tolerance** | ±20% | | **Maximum DC Current (Irms)** | ~4.2 Amperes (Typical) | | **Saturation Current (Isat)** | ~5.0 Amperes (Typical) | | **DC Resistance (DCR)** | ~77.0 mΩ (Typical) | | **Operating Temperature** | -55°C to +125°C | | **Package Size** | 1707 (Approx. 17.5mm x 17.2mm x 7.0mm) | --- ### 2. Design and Construction * **Material:** It uses an iron powder core material which provides high saturation current capabilities and low core losses. * **Shielding:** The inductor is **magnetically shielded**. This is critical for Electromagnetic Interference (EMI) sensitive designs, as it prevents the magnetic field from interfering with neighboring components. * **Construction:** It features a rugged, molded construction that offers superior protection against environmental factors and mechanical vibration. --- ### 3. Application Use Cases The HCM1707 series is primarily found in DC-DC converters and voltage regulator modules (VRMs). Common applications include: 1. **Automotive Systems:** Used in Engine Control Units (ECUs), LED lighting drivers, and infotainment systems (AEC-Q200 Grade 1 qualified). 2. **Industrial Power:** High-efficiency point-of-load (POL) converters. 3. **Computing:** Multi-phase regulators for servers and high-end workstations. --- ### 4. Part Number Breakdown The nomenclature follows a specific logic: ```text HCM 1707 - 680 - R | | | | | | | └─ RoHS Compliant | | └────── Inductance Code (68 x 10^0 = 68µH) | └──────────── Size Code (Dimensions) └───────────────── Product Series (High Current Inductor) ```