The **DFE252012F-R33M** is a high-performance, metal alloy power inductor manufactured by **Murata Electronics**. It is designed specifically for power management circuits in compact electronic devices where efficiency and space are critical. --- ## 1. Technical Specifications Below is a breakdown of the primary electrical and physical characteristics: | Parameter | Value / Specification | |:---|:---| | **Inductance** | 0.33 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 14 mΩ (Max) / 11 mΩ (Typ) | | **Rated Current (Isat)** | 6.5 A (based on inductance change) | | **Rated Current (Itemp)** | 5.3 A (based on temperature rise) | | **Case Size (EIA)** | 1008 | | **Dimensions (L x W x H)** | 2.5mm x 2.0mm x 1.2mm | | **Operating Temperature** | -40°C to +125°C | --- ## 2. Key Features and Construction ### A. Metal Alloy Core Unlike standard ferrite inductors, the DFE series uses a **magnetic metal powder** core. This construction provides several advantages: * **Soft Saturation:** The inductance drops gradually as current increases, rather than a sharp "cliff" drop seen in ferrite cores. * **High Current Density:** It can handle higher currents in a smaller physical footprint. ### B. Magnetic Shielding The part is magnetically shielded by its own construction (the metal powder surrounds the coil), which minimizes Electromagnetic Interference (EMI) with surrounding components. ### C. Low Profile With a height of only **1.2mm**, it is ideal for ultra-thin devices like smartphones, tablets, and wearable technology. --- ## 3. Applications The DFE252012F-R33M is typically found in the following circuits: 1. **DC-DC Converters:** Used as the storage element in buck/boost converters. 2. **Smartphones:** Powering high-speed processors and PMICs (Power Management ICs). 3. **Laptops & Tablets:** Used in power rails for CPU and GPU cores. 4. **IoT Devices:** Where high efficiency and small size are mandatory. --- ## 4. Part Number Decoder Understanding the naming convention: * **DFE**: Product Series (Metal Alloy type) * **2520**: Dimensions (2.5mm x 2.0mm) * **12**: Maximum Height (1.2mm) * **F**: Fixed Inductor * **R33**: Inductance Value (0.33 µH) * **M**: Tolerance (M = ±20%)