## Technical Overview: DFE252010F-R82M=P2 The **DFE252010F-R82M=P2** is a high-performance, metal alloy-type fixed inductor manufactured by **Murata Electronics**. It belongs to the DFE series, which is specifically designed for power circuits in space-constrained applications like smartphones, tablets, and wearable devices. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Inductance** | 0.82 µH | | **Tolerance** | ±20% | | **DC Resistance (Max)** | 33 mΩ | | **Rated Current (Isat)** | 4.4 A (based on Inductance change) | | **Rated Current (Itemp)** | 3.6 A (based on Temperature rise) | | **Operating Temperature** | -40°C to +125°C | | **Core Material** | Metal Alloy | | **Package Size (Metric)** | 2520 (2.5mm x 2.0mm) | | **Height (Max)** | 1.0 mm | --- ### 2. Physical Characteristics and Design * **Miniaturization:** The "2520" designation refers to its footprint (2.5mm x 2.0mm), and the "10" indicates its ultra-thin profile (1.0mm max height). * **Metal Alloy Construction:** Unlike traditional ferrite inductors, this part uses a metal alloy powder. This provides **magnetic saturation characteristics** that are much smoother, allowing the part to handle higher currents without a sharp drop in inductance. * **Magnetic Shielding:** The structure is naturally shielded, which minimizes Electromagnetic Interference (EMI) with surrounding components on the PCB. --- ### 3. Part Number Breakdown The part number follows a specific nomenclature: 1. **DFE**: Series Name (Metal Alloy Inductor) 2. **2520**: Dimensions (2.5mm x 2.0mm) 3. **10**: Maximum Height (1.0mm) 4. **F**: Internal code for product characteristics 5. **R82**: Inductance Value (R82 = 0.82µH) 6. **M**: Tolerance (M = ±20%) --- ### 4. Typical Applications Because of its high current capability and low profile, it is commonly used in: * **DC-DC Converters:** Used in point-of-load (POL) power supplies. * **Mobile Devices:** Power management modules for CPUs and GPUs in phones. * **Consumer Electronics:** Ultra-portable laptops and IoT devices. --- ### 5. Code Example: Typical Thermal Derating Model In power electronics design, engineers often simulate the thermal behavior of these inductors using basic scripts: ```python def check_current_limit(operating_temp, rated_temp_limit=125): """ Simple check to ensure operating temperature remains within Murata DFE252010F specifications. """ if operating_temp > rated_temp_limit: return "Warning: Temperature exceeds safe operating range." else: return "Safe: Component is within thermal limits." print(check_current_limit(85)) # Typical high-load scenario ```