The **DRQ73-100-R** is a high-performance, dual-winding shielded inductor manufactured by **Eaton (formerly Coiltronics)**. It belongs to the DRQ series, which is specifically designed for automotive and industrial applications requiring high power density and magnetic shielding. --- ## 1. Technical Specifications The "100" in the part number represents the inductance value, and the "R" indicates RoHS compliance. | Parameter | Value / Specification | | :--- | :--- | | **Inductance (L)** | 10.1 µH (Nominal) | | **Tolerance** | ±20% | | **Number of Windings** | 2 (Dual Winding) | | **DC Resistance (DCR)** | ~0.0454 Ω (Typ) | | **Isat (Saturation Current)** | 4.41 A (Parallel) / 2.20 A (Series) | | **Irms (Heating Current)** | 3.22 A (Parallel) / 1.61 A (Series) | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 7.6mm x 7.6mm x 3.55mm | --- ## 2. Key Features ### Dual Winding Versatility The DRQ73-100-R features two identical windings. This allows the component to be used in three different configurations: 1. **Series Connection:** Increases the total inductance (L x 4) but halves the current rating. 2. **Parallel Connection:** Keeps the inductance at the rated value but doubles the current capacity. 3. **1:1 Transformer:** Can be used as a SEPIC inductor or a flyback transformer. ### Magnetic Shielding The core is enclosed in a ferrite material that reduces **Electromagnetic Interference (EMI)**. This makes it ideal for densely packed circuit boards where noise might affect nearby sensitive components. ### AEC-Q200 Qualified This specific series is qualified for automotive use, meaning it can withstand high levels of mechanical shock, vibration, and thermal cycling. --- ## 3. Typical Applications * **SEPIC Converters:** Frequently used in Single-Ended Primary-Inductor Converters where two coupled inductors are required. * **Buck/Boost Regulators:** Used for voltage regulation in battery-powered devices. * **Common Mode Chokes:** Can be utilized for filtering noise in power lines. * **Industrial Electronics:** High-reliability power supplies and LED drivers. --- ## 4. Connection Diagram (Internal) ```text Winding 1: Pin 1 (Start) ---- Pin 4 (Finish) Winding 2: Pin 2 (Start) ---- Pin 3 (Finish) *To connect in Parallel: Tie Pin 1+2 and Pin 3+4 *To connect in Series: Tie Pin 2 and Pin 4 ```