The **DRA73-680-R** is a specific surface-mount power inductor designed for automotive and high-reliability industrial applications. It is manufactured by **Eaton (formerly Cooper Bussmann)**. --- ## 1. Component Overview The DRA series (Dual-Winding Inductor) is known for its high power density and rugged construction. The "680" in the part number indicates its inductance value. | Feature | Specification | | :--- | :--- | | **Inductance** | 68 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | ~0.89 Amps (Approx. 40°C rise) | | **Saturation Current (Isat)** | ~0.94 Amps (30% drop in L) | | **DC Resistance (DCR)** | ~0.457 Ohms (Typical) | | **Operating Temperature** | -40°C to +165°C | | **Package / Case** | 7.6mm x 7.6mm x 3.55mm | --- ## 2. Key Characteristics The DRA73-680-R is engineered for performance in harsh environments: * **Shielded Construction:** The inductor is magnetically shielded, which minimizes Electromagnetic Interference (EMI) with neighboring components. * **AEC-Q200 Qualified:** It meets automotive grade quality standards, meaning it can withstand high levels of thermal shock, mechanical vibration, and humidity. * **High Temperature Stability:** Its ability to operate up to 165°C makes it suitable for engine compartment electronics. * **Ferrite Core:** Utilizes a ferrite core material that provides low core losses at high switching frequencies. --- ## 3. Applications This part is commonly found in circuits requiring energy storage and noise filtering: 1. **Automotive Electronics:** Used in Engine Control Units (ECUs), LED lighting drivers, and infotainment systems. 2. **DC-DC Converters:** Acts as the primary energy storage element in buck, boost, or buck-boost converters. 3. **Noise Filtering:** Used in input/output filters to smooth out voltage ripples. 4. **Industrial Controls:** Suitable for robotics and heavy machinery sensors where space is limited but reliability is critical. --- ## 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: | Segment | Meaning | | :--- | :--- | | **DRA** | Series name (High power density, shielded) | | **73** | Size Code (Approx. 7.6mm x 7.6mm x 3.55mm) | | **680** | Inductance Code (68 followed by 0 zeros = 68 µH) | | **-R** | RoHS compliant / Lead-free |