The **MLZ2012E4R7MT** is a high-performance multilayer chip inductor designed by TDK Corporation, specifically optimized for decoupling and power supply circuits in mobile devices and consumer electronics. --- ### 1. Technical Specifications The following table summarizes the core electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Inductance** | 4.7 µH | | **Tolerance** | ±20% (M) | | **Rated Current (Isat/Itemp)** | 120 mA to 190 mA (Typical) | | **DC Resistance (DCR)** | 0.45 Ω (±30%) | | **Self-Resonant Frequency** | 45 MHz (Minimum) | | **Package / Case** | 0805 (2012 Metric) | | **Operating Temperature** | -55°C to +125°C | | **Material Type** | Ferrite Core | --- ### 2. Part Number Breakdown Understanding the nomenclature helps in identifying its specific properties: - **MLZ**: Series Name (Multilayer Inductor for Power Circuits). - **2012**: Dimensions (2.0mm x 1.25mm). - **E**: Characteristic type (Optimized for low DC resistance/high frequency). - **4R7**: Inductance Value (4.7 microhenries). - **M**: Inductance Tolerance (±20%). - **T**: Packaging Style (Tape and Reel). --- ### 3. Key Features & Applications #### Features * **Multilayer Structure:** Provides a compact footprint without the need for wire winding, ensuring high reliability and mechanical strength. * **Magnetic Shielding:** The ferrite construction provides internal shielding, reducing electromagnetic interference (EMI) with surrounding components. * **Broad Temperature Range:** Stable performance from cryogenic levels up to 125°C, making it suitable for dense, heat-generating PCB environments. #### Typical Applications 1. **Smartphones & Tablets:** Used in power management IC (PMIC) lines. 2. **Decoupling:** Filtering high-frequency noise in power supply lines to protect sensitive digital ICs. 3. **Modules:** Compact camera modules or Bluetooth/Wi-Fi modules where space is at a premium. --- ### 4. Comparison with Standard Inductors Unlike standard signal-line inductors, the **MLZ series** is engineered to handle higher currents without saturating quickly. This makes them a "bridge" between small signal inductors and larger power inductors. ---