## Technical Overview of DRA124-2R2-R The **DRA124-2R2-R** is a high-power, shielded drum core inductor manufactured by **Eaton (formerly Bussmann/Coiltronics)**. It is specifically designed for automotive and industrial applications where durability and high current handling are required. ### 1. Key Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 8.8 mΩ (Typical) | | **Saturation Current ($I_{sat}$)** | 14.8 Amps | | **RMS Current ($I_{rms}$)** | 8.35 Amps | | **Operating Temperature** | -40°C to +165°C | | **Dimensions** | 12.5mm x 12.5mm x 4.5mm | --- ### 2. Physical Construction & Features * **Magnetically Shielded:** The component is shielded to minimize Electromagnetic Interference (EMI), making it suitable for noise-sensitive circuits. * **Automotive Grade:** It is **AEC-Q200 Grade 1** qualified, meaning it can withstand mechanical shock, vibration, and extreme temperature cycling. * **High Temperature Stability:** The "DRA" series uses a high-density iron powder core material that performs reliably up to 165°C. * **Surface Mount (SMD):** Designed for standard pick-and-place assembly. --- ### 3. Common Applications Due to its high current rating and low DCR, the DRA124-2R2-R is commonly used in: 1. **Automotive Electronics:** Power steering, engine control units (ECU), and lighting. 2. **DC-DC Converters:** Buck or boost converters requiring high efficiency. 3. **Industrial Equipment:** Heavy-duty motor controllers and power supplies. 4. **Telecommunications:** Base station power distribution. --- ### 4. Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **DRA** | Series Name (Drum Core, Automotive) | | **124** | Size Code (Approx. 12.5mm x 4.5mm) | | **2R2** | Inductance Value (2.2 µH) | | **-R** | RoHS Compliant / Lead-Free |