## Technical Overview: DR1050-1R5-R The **DR1050-1R5-R** is a high-power, shielded surface-mount (SMD) inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the DR series, which is designed for high efficiency and high power density in compact electronic circuits. --- ### 1. Key Specifications The following table outlines the primary electrical and physical characteristics of the component: | Parameter | Value | | :--- | :--- | | **Inductance** | 1.5 µH | | **Tolerance** | ±30% | | **DC Resistance (DCR)** | 6.8 mΩ (Typical) | | **Saturation Current ($I_{sat}$)** | 10.5 A | | **RMS Current ($I_{rms}$)** | 7.55 A | | **Operating Temperature** | -40°C to +125°C | | **Dimensions** | 10.5mm x 10.3mm x 5.0mm | | **Shielding** | Magnetically Shielded | --- ### 2. Core Features * **Magnetic Shielding:** The inductor is enclosed in a ferrite drum core with a sleeve, which minimizes Electromagnetic Interference (EMI). This is critical for densely packed PCBs where noise can affect nearby components. * **High Power Density:** Despite its small footprint (approx. 10mm square), it can handle significant current (up to 10.5A before saturation), making it ideal for modern power electronics. * **Low DCR:** The low Direct Current Resistance ensures minimal power loss as heat, contributing to higher overall system efficiency. * **Lead-Free/RoHS Compliant:** The "-R" suffix indicates that the part is compliant with environmental regulations regarding hazardous substances. --- ### 3. Common Applications The DR1050-1R5-R is typically used in power management circuits where voltage conversion is required: 1. **DC-DC Converters:** Used as the energy storage element in Buck (step-down), Boost (step-up), and SEPIC converters. 2. **Voltage Regulator Modules (VRMs):** Found in computer motherboards and servers to provide stable power to CPUs and GPUs. 3. **Battery Powered Devices:** High efficiency makes it suitable for portable electronics to extend battery life. 4. **Industrial Electronics:** Used in LED drivers and distributed power systems. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying similar parts in the series: * **DR:** Series Name (Drum Core, Shielded). * **1050:** Physical Size (approx. 10mm wide, 5.0mm high). * **1R5:** Inductance Value (1.5 microhenries). The "R" acts as a decimal point. * **-R:** RoHS Compliant.