The **DR1050-101-R** is a high-power, shielded surface-mount (SMD) inductor manufactured by Eaton (formerly Cooper Bussmann/Coiltronics). It is part of the DR series, designed specifically for high-density applications requiring low electromagnetic interference (EMI). --- ### 1. Technical Specifications Below are the primary electrical and physical characteristics of the component: | Property | Value | | :--- | :--- | | **Inductance** | 100 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.250 Ohms (Typical) | | **Rated Current (Irms)** | 1.35 Amps | | **Saturation Current (Isat)** | 1.55 Amps | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Key Features * **Magnetically Shielded:** The drum core is enclosed in a ferrite sleeve, which minimizes EMI and prevents the inductor from interfering with nearby sensitive components. * **High Power Density:** Designed to provide high inductance and current handling in a relatively small footprint ($10.3 \times 10.5 \times 5.0$ mm). * **Ferrite Core Material:** Ensures low core losses and high efficiency in power conversion. * **RoHS Compliant:** The "-R" suffix indicates that the part is lead-free and compliant with environmental regulations. --- ### 3. Common Applications This inductor is typically used in power management circuits where voltage needs to be stepped up or down. * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Computer Peripherals:** Used in laptops, servers, and storage drives. * **Industrial Electronics:** Power supplies for sensors and control systems. * **Consumer Electronics:** LED drivers and portable battery-powered devices. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: 1. **DR:** Product Series (Drum Core, Shielded). 2. **1050:** Physical dimensions (approx. 10mm width, 5.0mm height). 3. **101:** Inductance code (10 + one zero = 100µH). 4. **R:** RoHS compliant.