The **DR73-680-R** is a high-performance, shielded power inductor part of the DR series manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is widely used in DC-DC converters and power management circuits. --- ### 1. Technical Specifications The part number "680" indicates the inductance value, while the "R" indicates RoHS compliance. | Parameter | Value | | :--- | :--- | | **Inductance** | 68.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.222 Ω (Max) | | **Rated Current (Irms)** | 1.02 Amps | | **Saturation Current (Isat)** | 1.14 Amps | | **Operating Temperature** | -40°C to +125°C | | **Package/Case** | SMD (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:** Provides high current handling capabilities relative to its small surface-mount footprint. * **Ferrite Core Material:** Ensures low core losses, making it efficient for high-frequency switching applications (up to 1 MHz). * **Construction:** Ruggedized design suitable for automated surface mount assembly (Pick and Place). --- ### 3. Common Applications This inductor is typically found in: * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Computing:** Laptops, servers, and motherboards. * **Consumer Electronics:** LED drivers, game consoles, and portable devices. * **Industrial:** Power supplies and distributed power systems. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in selecting alternatives: | Segment | Meaning | | :--- | :--- | | **DR** | Product Series (Drum Core Inductor) | | **73** | Size Code (Approx. 7.6mm x 3.55mm) | | **680** | Inductance Code (68 x $10^0$ = 68 µH) | | **-R** | RoHS Compliant | ---