## Technical Overview: DR125-680-R Inductor The **DR125-680-R** is a high-power, shielded drum core inductor manufactured by **Eaton (formerly Coiltronics)**. It is part of the DR series, designed specifically for high-density surface-mount applications. --- ### 1. Key Technical Specifications The part number itself contains encoded information about its properties. | Parameter | Specification | | :--- | :--- | | **Inductance** | 68 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.138 Ohms (Typical) | | **RMS Current ($I_{rms}$)** | 1.79 Amps | | **Saturation Current ($I_{sat}$)** | 2.12 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Shielded (Magnetic) | --- ### 2. Physical Characteristics The "125" in the part number refers to the physical dimensions of the component. * **Size:** Approximately 12.5mm x 12.5mm base. * **Height:** 6.0mm (Maximum). * **Mounting Type:** Surface Mount (SMD). * **Core Material:** Ferrite. * **Construction:** Drum core construction with a ferrite sleeve to minimize Electromagnetic Interference (EMI). --- ### 3. Application Use Cases This specific inductor is commonly found in power management circuits where efficiency and noise suppression are critical. * **DC-DC Converters:** Used in Buck, Boost, and SEPIC topologies. * **Computer Peripherals:** Power supplies for laptops, servers, and storage drives. * **Industrial Electronics:** Distributed power systems and battery-powered equipment. * **Consumer Electronics:** LED drivers and high-definition televisions. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying similar components: | Segment | Meaning | | :--- | :--- | | **DR** | Product Series (Drum Core) | | **125** | Size Code (12.5mm x 12.5mm x 6.0mm) | | **680** | Inductance Code (68 x $10^0$ = 68 µH) | | **-R** | RoHS Compliant / Lead-Free |