The **MHR68TGJ-R** is a high-performance, shielded power inductor typically utilized in high-frequency DC-DC converter applications and power management modules. These components are designed to provide stable inductance under varying thermal conditions while minimizing electromagnetic interference (EMI). --- ### 1. Key Technical Specifications Below are the typical parameters associated with the MHR series (specifically the 68TGJ-R variant): | Parameter | Typical Value / Description | | :--- | :--- | | **Inductance** | Specified by the "68" code (typically 6.8µH or 68µH depending on series scale) | | **Tolerance** | ±20% (Standard for Power Inductors) | | **Shielding** | Magnetically Shielded (reduces EMI) | | **Mounting Type** | Surface Mount Device (SMD/SMT) | | **Core Material** | Ferrite or Composite Metal Powder | | **Operating Temp** | -40°C to +125°C (Inclusive of self-heating) | --- ### 2. Physical Construction and Components The part is engineered to balance physical size with current-handling capability: * **Winding:** High-purity copper wire used to ensure low Direct Current Resistance (DCR). * **Core:** A high-permeability ferrite core that concentrates the magnetic flux. * **Shielding Case:** A metallic or magnetic resin coating that encapsulates the winding to prevent magnetic flux leakage, which is critical for dense PCB layouts. * **Terminations:** Lead-free (RoHS compliant) solder pads designed for reflow soldering. --- ### 3. Electronic Behavior and Applications The MHR68TGJ-R functions primarily as an energy storage device. Its behavior is characterized by: 1. **Saturation Current ($I_{sat}$):** The point where inductance drops by a specific percentage (usually 30%). This part is designed for a "soft" saturation curve. 2. **Temperature Rise Current ($I_{rms}$):** The current that causes the component temperature to rise by 40°C. 3. **Low DCR:** Minimizes power loss (heat) during operation, increasing the efficiency of the power supply. **Common Use Cases:** * **DC-DC Converters:** Used in Buck, Boost, or Buck-Boost topologies. * **Consumer Electronics:** Power rails for CPUs, GPUs, and FPGAs in laptops or tablets. * **Automotive/Industrial:** Robustness against vibration and wide temperature swings. --- ### 4. Part Number Breakdown (Typical) While naming conventions vary by manufacturer, the code usually follows this logic: * **MHR:** Series identifier (High current/Shielded). * **68:** Inductance value code. * **T:** Taping/Packaging (Tape & Reel). * **G/J:** Tolerance or Material classification. * **R:** RoHS Compliant / Revision indicator.