The **DRAQ75-150-R** is a high-performance power inductor part of the DRAQ series manufactured by **Eaton (formerly Bussmann/Coiltronics)**. This component is specifically designed for automotive applications and high-power density electronics. --- ### 1. Key Technical Specifications The part number "DRAQ75-150-R" encodes specific technical data: | Parameter | Specification | Details | |:---|:---|:---| | **Inductance** | 15.0 µH | Rated at 100 kHz, 0.1 Vrms | | **DC Resistance (DCR)** | 0.053 Ω (Typ) | Typical resistance at 20°C | | **Isat (Saturation Current)** | 4.80 A | Current at which inductance drops ~30% | | **Irms (Heating Current)** | 3.52 A | Current causing a 40°C temperature rise | | **Tolerance** | ±20% | Standard inductance tolerance | | **Operating Temp** | -40°C to +165°C | High-temperature automotive grade | --- ### 2. Design and Construction The DRAQ series is distinct because of its **dual-winding** or **coupled inductor** configuration, though it is often used as a single high-power inductor. * **Magnetically Shielded:** The core is encapsulated to minimize Electromagnetic Interference (EMI), which is critical in sensitive automotive circuits. * **Dual Winding:** It consists of two identical windings that can be connected in series or parallel to double the inductance or the current capacity, respectively. * **AEC-Q200 Qualified:** It meets rigorous stress-test standards for automotive environments (vibration, thermal shock, and moisture). --- ### 3. Connection Configurations Because this is a coupled inductor with four terminals, it offers versatility: | Configuration | Inductance | Current Capacity | |:---|:---|:---| | **Series** | 60 µH (approx) | Lower Current | | **Parallel** | 15 µH | Higher Current | | **Transformer** | 1:1 Ratio | Isolation / SEPIC mode | --- ### 4. Common Applications Due to its ruggedness and efficiency, the DRAQ75-150-R is typically found in: * **DC-DC Converters:** Buck, Boost, and SEPIC topologies. * **Automotive Electronics:** Power steering, LED lighting, and engine control units (ECU). * **Industrial Power Supplies:** Where high reliability and small footprint are required. * **Battery Powered Systems:** High efficiency helps extend battery life. --- ### 5. Part Number Breakdown ```text DRAQ 75 - 150 - R | | | | | | | +-- RoHS Compliant | | +------- Inductance Code (150 = 15.0 µH) | +------------ Size Dimension (Approx 7.6mm x 7.6mm) +----------------- Series Name (Dual Winding, Automotive Grade) ```