## Analysis of the DRQ127-101-R Electronic Component The **DRQ127-101-R** is a high-power, shielded dual-winding inductor (coupled inductor) manufactured by **Eaton (formerly Coiltronics)**. It is part of the DRQ series, known for its versatility in power conversion circuits. --- ### 1. Technical Specifications Below are the key electrical and physical parameters for the `101-R` variant: | Parameter | Specification | | :--- | :--- | | **Inductance** | 100 µH (Nominal) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 0.208 Ω (Typical) | | **Irms (Root Mean Square Current)** | 1.83 Amps | | **Isat (Saturation Current)** | 2.14 Amps | | **Construction** | Dual Winding (Coupled) | | **Shielding** | Magnetically Shielded | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Physical Dimensions The "127" in the part number refers to the package size, which is approximately **12.5mm x 12.5mm**. * **Length:** 12.5 mm * **Width:** 12.5 mm * **Height:** 8.0 mm (Maximum) --- ### 3. Key Features and Applications The DRQ127-101-R is unique because it contains **two identical windings** that can be connected in various configurations. #### Common Wiring Configurations: 1. **Series Connection:** Doubles the inductance (400 µH) but maintains the same current rating. 2. **Parallel Connection:** Keeps the inductance at 100 µH but increases the current handling capacity. 3. **Transformer Mode:** Acts as a 1:1 transformer for isolation or voltage level shifting. #### Typical Applications: * **SEPIC Converters:** Used as the coupling inductor to maintain steady energy flow. * **Flyback Transformers:** Suitable for low-power isolated DC-DC conversion. * **Buck/Boost Converters:** High-efficiency power regulation. * **Common Mode Chokes:** Filtering noise in power lines. --- ### 4. Part Number Breakdown Understanding the nomenclature helps identify other parts in the series: * **DRQ:** Dual Winding, Shielded Drum Core. * **127:** Case size (12.5mm x 8.0mm). * **101:** Inductance code (10 + 1 zero = 100 µH). * **-R:** RoHS compliant / Lead-free. ---