The **DRA74-2R2-R** is a high-performance, shielded power inductor designed primarily for automotive and industrial electronics. It is manufactured by Eaton (formerly Bussmann/Coiltronics). ### Technical Specifications Below is a summary of the core electrical and physical characteristics of the component: | Parameter | Value | | :--- | :--- | | **Inductance** | 2.2 µH | | **Tolerance** | ±20% | | **Current Rating (Irms)** | 7.97 A (Typical) | | **Saturation Current (Isat)** | 10.7 A (Typical) | | **DC Resistance (DCR)** | 9.1 mΩ (Typical) | | **Operating Temperature** | -40°C to +165°C | | **Package / Case** | 7.6mm x 7.6mm x 4.35mm | | **Shielding** | Shielded (Magnetic) | --- ### Key Features and Construction 1. **Magnetic Shielding:** The inductor is magnetically shielded, which minimizes Electromagnetic Interference (EMI). This is critical in dense PCB layouts where noise can affect nearby sensitive components. 2. **AEC-Q200 Qualified:** This part is automotive grade. It has undergone rigorous stress testing to ensure reliability in harsh environments, including high vibration and extreme temperature fluctuations. 3. **High Temperature Resilience:** Unlike standard consumer-grade inductors, the DRA series is rated for a maximum operating temperature of **+165°C**, making it suitable for under-the-hood automotive applications. 4. **Low DCR:** The low direct current resistance (9.1 mΩ) ensures high efficiency by minimizing power loss through heat (Joule heating). ### Common Applications The DRA74-2R2-R is typically found in the following circuits: * **DC-DC Converters:** Used as energy storage elements in buck, boost, or buck-boost regulators. * **Automotive Infotainment:** Powering displays and head units. * **Advanced Driver Assistance Systems (ADAS):** Providing stable power to sensors and cameras. * **LED Lighting:** Used in constant current drivers for automotive headlights. ### Part Number Breakdown ```text DRA 74 - 2R2 - R | | | | | | | +-- RoHS Compliant | | +--------- Inductance Value (2.2µH) | +---------------- Size Code (Approx. 7x7x4mm) +--------------------- Series Name (Automotive Grade) ```