## Overview of DRQ125-2R2-R The **DRQ125-2R2-R** is a high-power, shielded dual-winding inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the DRQ series, which is specifically designed for high-density, high-efficiency power conversion applications. --- ### 1. Key Technical Specifications The part number encodes specific characteristics of the component. Below is a breakdown of its primary electrical parameters: | Parameter | Value / Specification | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **Rated Current (Irms)** | 12.8 Amps | | **Saturation Current (Isat)** | 19.3 Amps | | **DC Resistance (DCR)** | 5.56 mΩ (Max) | | **Configuration** | Dual Winding (4 Terminals) | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Dimensions and Construction The "125" in the part number refers to the case size, which is standardized for surface mount technology (SMT). * **Footprint:** Approximately 12.5mm x 12.5mm. * **Height:** 6.0mm (Maximum). * **Core Material:** Ferrite (provides low core losses at high frequencies). * **Packaging:** Available in Tape and Reel for automated assembly. --- ### 3. Functional Features #### Dual Winding Capability Because this inductor has two separate windings, it is highly versatile. It can be configured in three ways: 1. **Series:** Increases total inductance. 2. **Parallel:** Increases current handling capability. 3. **1:1 Transformer:** Can be used as a coupled inductor or a SEPIC (Single-Ended Primary-Inductor Converter) inductor. #### Low EMI (Electromagnetic Interference) The **magnetically shielded** construction ensures that the magnetic flux remains contained within the component. This prevents interference with sensitive nearby components on the PCB. --- ### 4. Common Applications The DRQ125-2R2-R is commonly found in the following electronic circuits: * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Power Supplies:** Used in industrial, automotive, and telecommunications equipment. * **Battery Powered Systems:** High efficiency makes it ideal for extending battery life. * **Computer Peripherals:** Voltage Regulator Modules (VRMs) for CPUs and GPUs. ---