The **MLZ2012DR47DT000** is a high-performance multilayer ferrite inductor manufactured by **TDK Corporation**. It is specifically designed for decoupling circuits in power lines, particularly for mobile devices and high-frequency communication modules. ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Inductance** | 0.47 µH | | **Tolerance** | ±20% | | **DC Resistance (RDC)** | 0.11 Ω (Max) | | **Rated Current (Isat/Itemp)** | 800 mA | | **Self-Resonant Frequency** | 250 MHz (Min) | | **Operating Temperature** | -55°C to +125°C | | **Package / Case** | 0805 (2012 Metric) | | **Dimensions** | 2.00mm x 1.25mm x 1.25mm | --- ### 2. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics of the component: * **MLZ**: Series Name (Multilayer Ferrite Inductor for Power Circuits) * **2012**: Dimensions (Length 2.0mm x Width 1.25mm) * **D**: Characteristic Type (Optimized for low RDC and high current) * **R47**: Inductance Value (R47 = 0.47 microhenries) * **D**: Tolerance (D = ±20% in this specific context/series variation) * **T000**: Packaging Code (Tape and Reel) --- ### 3. Core Features and Applications #### Features * **Multilayer Construction:** Unlike wire-wound inductors, this uses printed layers of ferrite and conductive paste, resulting in a compact, monolithic structure with no external wires to break. * **Low DC Resistance:** The "D" characteristic ensures minimal power loss through heat, making it efficient for battery-powered devices. * **Magnetic Shielding:** The ferrite body prevents magnetic flux leakage, reducing electromagnetic interference (EMI) with neighboring components. #### Common Applications 1. **Smartphones and Tablets:** Used in power management IC (PMIC) decoupling. 2. **Communication Modules:** Filtering noise in Bluetooth, Wi-Fi, and LTE modules. 3. **DC-DC Converters:** Small-scale voltage regulation where space is at a premium. --- ### 4. Typical Performance Graph (Conceptual) | Frequency (MHz) | Impedance (Ω) | | :--- | :--- | | 1 MHz | Low (~0.1) | | 10 MHz | Moderate | | 100 MHz | High (Peak Reactance) | *Note: The MLZ series behaves like a resistor at high frequencies, effectively "absorbing" noise and converting it into tiny amounts of heat.*