The **DR73-151-R** is a high-performance, shielded power inductor part of the **DR Series** manufactured by **Eaton (formerly Coiltronics)**. These components are primarily used in DC-DC converters and power management circuits. --- ## 1. Technical Specifications The part number follows a specific nomenclature. Here is the breakdown of its key electrical and physical parameters: | Parameter | Specification | | :--- | :--- | | **Inductance** | 150 µH (Microhenries) | | **Tolerance** | ±20% | | **Rated Current (Irms)** | ~0.77 Amps (Temperature rise dependent) | | **Saturation Current (Isat)** | ~0.84 Amps (Inductance drop dependent) | | **DC Resistance (DCR)** | ~0.505 Ohms (Max) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 7.6mm x 7.6mm x 3.55mm | --- ## 2. Key Features * **Magnetically Shielded:** The drum core is enclosed in a ferrite sleeve, which minimizes Electromagnetic Interference (EMI) and protects nearby sensitive components. * **High Power Density:** Designed to handle significant current relative to its small surface-mount footprint. * **Ferrite Core Material:** Ensures low core losses at high frequencies, improving the efficiency of power supplies. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with environmental standards. --- ## 3. Typical Applications The DR73-151-R is commonly integrated into the following systems: 1. **Buck/Boost Converters:** Used for energy storage to step up or step down voltages. 2. **Computer Peripherals:** Found in laptops, servers, and storage drives. 3. **LED Drivers:** Used to maintain constant current for lighting applications. 4. **Filter Inductors:** Used in input/output filters to smooth out voltage ripples. --- ## 4. Part Number Breakdown The naming convention is structured as follows: * **DR:** Series name (Drum core, shielded). * **73:** Size code (Approx. 7mm wide, 3mm high). * **151:** Inductance value. The first two digits are significant figures, the third is the multiplier ($15 \times 10^1 = 150 \mu H$). * **R:** RoHS compliant.