## DR1050-681-R: Technical Overview The **DR1050-681-R** is a high-performance, shielded power inductor designed by **Eaton (formerly Bussmann)**. It belongs to the DR1050 series, which is characterized by its high power density and low profile. ### 1. Key Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 680 µH | | **Tolerance** | ±20% | | **Inductance Code** | 681 (68 + 1 zero) | | **DC Resistance (DCR)** | 1.15 Ω (Typical) | | **Rated Current (Irms)** | 0.58 A | | **Saturation Current (Isat)** | 0.65 A | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | --- ### 2. Physical Characteristics The "1050" in the part number refers to the physical dimensions of the component. * **Dimensions:** Approximately 10.5mm x 10.3mm with a height of 5.0mm. * **Mounting Type:** Surface Mount Device (SMD). * **Construction:** Ferrite drum core with a ferrite sleeve (shield) to minimize Electromagnetic Interference (EMI). * **Compliance:** RoHS compliant and Lead-Free. --- ### 3. Functional Features * **Magnetic Shielding:** The closed magnetic path significantly reduces EMI, making it suitable for noise-sensitive circuits and high-density PCB layouts. * **High Energy Storage:** Designed to handle significant energy for its size, making it ideal for DC-DC conversion. * **Low Core Loss:** Optimized for high-frequency switching applications. --- ### 4. Typical Applications The DR1050-681-R is commonly found in power management circuits, including: 1. **Buck/Boost Converters:** Used as energy storage elements in DC-DC voltage regulation. 2. **LED Drivers:** Providing constant current for lighting applications. 3. **Industrial Electronics:** Used in power supplies for sensors and controllers. 4. **Computer Peripherals:** Voltage regulation modules for hard drives and motherboards. --- ### 5. Part Number Breakdown `DR1050 - 681 - R` * **DR1050:** Product Series and Size (10mm wide, 5mm high). * **681:** Inductance value in microhenries (68 + one zero = 680 µH). * **R:** RoHS compliant version.