## DRA124-471-R: Technical Overview The **DRA124-471-R** is a high-power, shielded drum core inductor manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is part of the DRA series, which is specifically designed for high-power density and high-temperature environments, making it ideal for automotive and industrial applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Inductance** | 470 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 0.65 Amps (650 mA) | | **Saturation Current (Isat)** | 0.82 Amps (820 mA) | | **DC Resistance (DCR)** | 1.096 Ohms (Typical) | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +165°C | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Component Composition and Design The "DRA" series features specific design elements that differentiate it from standard inductors: * **Shielded Construction:** The magnetic shielding minimizes Electromagnetic Interference (EMI), allowing the component to be placed near sensitive circuitry without causing noise issues. * **High Temperature Rating:** Rated for up to 165°C, it is designed to withstand the harsh thermal conditions found under the hood of a vehicle. * **Mechanical Integrity:** The series is often AEC-Q200 qualified, meaning it has passed rigorous stress tests for vibration, thermal shock, and mechanical strength. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying variants: | Segment | Meaning | | :--- | :--- | | **DRA** | Product Series (High Power Density) | | **124** | Size Code (approx. 12.5mm x 12.5mm x 4.5mm) | | **471** | Inductance Code (47 followed by 1 zero = 470 µH) | | **R** | RoHS Compliant | --- ### 4. Common Applications Due to its high inductance and shielding, this part is commonly used in: * **Automotive Electronics:** Engine control units (ECU), lighting, and infotainment systems. * **Power Supplies:** DC-DC converters and switching regulators. * **Industrial Equipment:** Robotics and process control systems. * **Noise Filtering:** Used as a choke for power line filtering to eliminate high-frequency noise. ---