The **DR1045** is a series of **high-power, shielded surface-mount (SMD) inductors** manufactured by Eaton (formerly Cooper Bussmann). These components are designed for high-density power applications where space is limited and electromagnetic interference (EMI) must be minimized. --- ### 1. Key Technical Specifications The "1045" in the part number typically refers to the physical dimensions: approximately **10.5 mm x 10.3 mm** with a height of **4.5 mm**. | Parameter | Range / Typical Value | | :--- | :--- | | **Inductance Range** | 0.82 µH to 1000 µH | | **Current Rating (Irms)** | 0.54 A to 10.5 A (varies by inductance) | | **Saturation Current (Isat)** | 0.70 A to 15.5 A | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Ferrite drum core with magnetic shielding | --- ### 2. Core Features * **Magnetic Shielding:** The ferrite drum core is enclosed in a sleeve or molding that contains the magnetic field. This reduces EMI and prevents the inductor from interfering with nearby sensitive components. * **High Power Density:** Optimized for a high current-carrying capacity relative to its small 4.5 mm profile. * **Low Core Loss:** Designed to maintain efficiency even at high switching frequencies. * **Robust Construction:** Suitable for automated SMT (Surface Mount Technology) assembly and lead-free reflow soldering. --- ### 3. Common Applications The DR1045 series is primarily found in DC-DC conversion circuits. * **Buck/Boost Converters:** Used as the energy storage element in voltage regulators. * **Consumer Electronics:** Laptops, servers, and high-end gaming consoles. * **Industrial Equipment:** Power supplies for sensors and control units. * **LED Drivers:** Providing steady current for high-brightness lighting applications. --- ### 4. Part Numbering Example A typical part number looks like `DR1045-100-R`: * **DR1045:** Series name and size. * **100:** Inductance value (10 µH). The first two digits are significant; the third is the multiplier (number of zeros). * **R:** Indicates the part is RoHS compliant.