The part number **DR1050-R80-R** refers to a high-power, shielded surface-mount (SMD) inductor manufactured by **Eaton (formerly Coiltronics)**. This specific component belongs to the DR series, which is known for its high power density and drum core construction. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify the specific characteristics of the component: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **DR** | Series Name | Drum core, shielded inductor | | **1050** | Size Code | Approx. 10.5mm x 10.3mm x 5.0mm | | **R80** | Inductance Value | 0.80 µH (Microhenries) | | **-R** | Compliance | RoHS Compliant | --- ### 2. Technical Specifications The DR1050-R80-R is designed for high-current applications where space and efficiency are critical. * **Inductance:** 0.80 µH * **Tolerance:** ±30% (standard for very low inductance power inductors) * **DC Resistance (DCR):** Extremely low (typically around 4.0 mΩ to 5.2 mΩ) to minimize power loss. * **Rated Current (Irms):** High current carrying capacity, usually exceeding 10A (depending on thermal conditions). * **Saturation Current (Isat):** The point where inductance drops by 30%; for this part, it is typically very high (approx. 15A - 18A). * **Operating Temperature:** -40°C to +125°C. --- ### 3. Key Features * **Magnetically Shielded:** The core is "closed," which minimizes Electro-Magnetic Interference (EMI) with surrounding components on the PCB. * **High Power Density:** Large current capability relative to its 10mm x 5mm footprint. * **Ferrite Core Material:** Ensures low core losses at high switching frequencies. * **Flat Top:** Designed for automated "pick and place" assembly. --- ### 4. Common Applications This inductor is primarily used in power management circuits, specifically: 1. **DC-DC Converters:** Used as the energy storage element in Buck, Boost, or SEPIC converters. 2. **Voltage Regulator Modules (VRM):** Common in computer motherboards and servers for CPU power. 3. **Battery Powered Systems:** Ideal for portable electronics requiring high efficiency. 4. **Telecommunications:** Used in distributed power systems and base stations. ---