The **DRA124-R47-R** is a high-power, shielded drum core inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the DRA series, which is specifically designed for automotive applications and high-efficiency power conversion. --- ### 1. Key Technical Specifications The part number itself contains specific data regarding its electrical characteristics: | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 14.8 Amps (Continuous) | | **Saturation Current (Isat)** | 25.1 Amps | | **DC Resistance (DCR)** | 2.50 mΩ (Typical) | | **Operating Temperature** | -40°C to +165°C | | **Shielding** | Magnetically Shielded | --- ### 2. Component Composition & Design The DRA124 series is engineered for rugged environments. Its construction focuses on thermal stability and electromagnetic interference (EMI) reduction. * **Core Material:** Ferrite drum core. * **Shielding:** Integrated ferrite sleeve that minimizes EMI, preventing the magnetic field from interfering with neighboring components. * **Mounting:** Surface Mount Device (SMD). * **AEC-Q200 Qualified:** This means it has passed rigorous stress testing for use in the automotive industry (vibration, thermal shock, moisture resistance). --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **DRA** | Product Series (High power, shielded) | | **124** | Size Dimensions (approx. 12.5mm x 12.5mm x 4.5mm) | | **R47** | Inductance Value (R denotes decimal: 0.47 microhenries) | | **-R** | RoHS Compliant / Lead-Free | --- ### 4. Common Applications Due to its high current handling and low DCR, the DRA124-R47-R is typically found in: * **Automotive Electronics:** Engine control units (ECUs), LED lighting drivers, and infotainment systems. * **DC-DC Converters:** Used as a filter or energy storage element in buck/boost regulators. * **Industrial Power Supplies:** High-efficiency voltage regulation modules (VRMs). * **Battery Powered Systems:** Where low resistance is critical to extend battery life. ---