The **DR1050-181-R** is a high-performance, shielded power inductor designed by Eaton (formerly Cooper Bussmann). It belongs to the DR series, which is widely used in DC-DC converters and power management circuits. --- ### 1. Technical Specifications Below are the key electrical and physical characteristics of the DR1050-181-R: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 180 µH | | **Tolerance** | ±20% | | **Inductance Code** | 181 (18 + one zero) | | **DC Resistance (DCR)** | 0.540 Ω (Max) | | **RMS Current (Irms)** | 0.88 Amps | | **Saturation Current (Isat)** | 1.10 Amps | | **Operating Temperature** | -40°C to +125°C | | **Shielding** | Magnetically Shielded | --- ### 2. Physical Construction The part is built using specific materials and methods to ensure efficiency in high-density electronics: * **Core Material:** Ferrite drum and sleeve. This provides high efficiency and low core losses. * **Shielding:** The "Shielded" design minimizes EMI (Electromagnetic Interference), which is critical for preventing the inductor from interfering with nearby sensitive components on a PCB. * **Form Factor:** It is a Surface Mount Device (SMD). * **Dimensions:** Approximately 10.3mm x 10.5mm with a height of 5.0mm. --- ### 3. Key Features & Benefits * **High Power Density:** Capable of handling significant current relative to its small footprint. * **Low EMI:** The magnetic shielding contains the magnetic flux, making it ideal for noise-sensitive applications. * **Environmental Compliance:** It is lead-free, halogen-free, and RoHS compliant (indicated by the **-R** suffix). --- ### 4. Common Applications The DR1050-181-R is typically found in the following systems: 1. **DC-DC Converters:** Used as an energy storage element in buck, boost, or SEPIC converters. 2. **Computers:** Found on motherboards and in laptop power supplies. 3. **Industrial Electronics:** Used in LED drivers and distributed power systems. 4. **Consumer Electronics:** Powering displays, set-top boxes, and game consoles.