### Overview of the DRA73-151-R The **DRA73-151-R** is a high-performance, shielded power inductor designed primarily for automotive and industrial applications. It is manufactured by **Eaton (formerly Bussmann/Coiltronics)** as part of their DRA series. --- ### Key Specifications Below are the technical parameters that define this specific component: | Parameter | Specification | | :--- | :--- | | **Inductance** | 150 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 0.826 Amperes | | **Saturation Current (Isat)** | 0.941 Amperes | | **DC Resistance (DCR)** | 549 mΩ (Typical) | | **Operating Temperature** | -40°C to +165°C | | **Shielding** | Magnetic Shielding (Low EMI) | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### Detailed Characteristics #### 1. AEC-Q200 Qualified The "DRA" prefix indicates that this part is automotive grade. It has passed rigorous stress testing (AEC-Q200), meaning it can withstand high vibration, mechanical shock, and extreme temperature fluctuations typical in vehicle environments. #### 2. Magnetic Shielding The inductor is housed in a ferrite drum core with a ferrite sleeve. This construction minimizes **Electromagnetic Interference (EMI)**, ensuring that the magnetic fields generated by the inductor do not interfere with sensitive nearby components on the PCB. #### 3. High Temperature Stability Unlike standard commercial inductors, the DRA73-151-R is rated for a maximum operating temperature of **+165°C**. This makes it ideal for "under-the-hood" automotive applications or dense power supplies where heat dissipation is a challenge. --- ### Applications The DRA73-151-R is commonly found in the following circuits: * **Automotive Electronics:** Engine control units (ECU), lighting (LED drivers), and infotainment systems. * **DC-DC Converters:** Buck, boost, and buck-boost regulators. * **Industrial Equipment:** High-temperature sensors and power modules. * **Noise Filtering:** Used as an output filter to smooth current and reduce ripple in power supplies. --- ### Physical Dimensions The "73" in the part number refers to the package size: * **Length/Width:** Approximately 7.6 mm x 7.6 mm * **Height:** Approximately 3.55 mm