## Electronic Overview: DR73-150-R Inductor The **DR73-150-R** is a high-performance, shielded power inductor manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). It is part of the DR series, specifically designed for high power density and efficiency in a compact surface-mount package. --- ### 1. Key Technical Specifications The following table outlines the primary electrical and physical characteristics of the DR73-150-R: | Parameter | Value | | :--- | :--- | | **Inductance** | 15.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.050 Ω (Typical) | | **Saturation Current ($I_{sat}$)** | 2.52 A | | **RMS Current ($I_{rms}$)** | 2.50 A | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Shielded (Low EMI) | | **Package Size** | 7.6mm x 7.6mm x 3.55mm | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **DR:** Series name (Drum Core, Shielded). * **73:** Size code (Approx. 7.6mm length/width and 3.5mm height). * **150:** Inductance value code ($15 \times 10^0$ = 15 µH). * **R:** RoHS compliant. --- ### 3. Core Features and Construction * **Magnetic Shielding:** The component is shielded, which minimizes Electromagnetic Interference (EMI). This makes it suitable for noise-sensitive circuits and high-density PCB layouts where components are placed closely together. * **Ferrite Core:** Utilizes a ferrite drum core which provides high saturation current levels relative to its size. * **Rugged Design:** The "DR" series is known for high mechanical strength and excellent thermal stability, ensuring reliable performance under varying loads. --- ### 4. Typical Applications The DR73-150-R is commonly found in the following electronic circuits: 1. **DC-DC Converters:** Used as energy storage elements in buck, boost, and buck-boost regulators. 2. **Power Supplies:** Found in laptop, desktop, and server power management modules. 3. **Battery Powered Devices:** Ideal for handheld electronics due to its small footprint and high efficiency. 4. **Filter Inductors:** Used in LC filters to smooth out voltage ripples in power lines. ---