The **MPT135-R68H1** is a high-current, shielded power inductor typically used in automotive and industrial electronics. It belongs to a category of surface-mount device (SMD) components designed for power conversion and noise filtering. --- ### 1. Key Technical Specifications Based on standard nomenclature for the MPT series, here are the primary electrical characteristics: | Parameter | Specification (Typical) | | :--- | :--- | | **Inductance** | 0.68 µH (Indicated by "R68") | | **Tolerance** | ±20% (Standard for "M" series) | | **DCR (Direct Current Resistance)** | ~2.5 mΩ to 3.5 mΩ (Low resistance) | | **Saturation Current (Isat)** | ~25A to 35A | | **Heating Current (Irms)** | ~20A to 25A | | **Operating Temperature** | -55°C to +125°C or +155°C (Automotive Grade) | --- ### 2. Component Construction The "MPT" series generally refers to **Molded Power Inductors**. Their construction offers several advantages over traditional wire-wound inductors: * **Composite Core:** Uses a metallic iron powder core molded directly around the copper coil. * **Magnetic Shielding:** The molded body naturally shields the component, reducing electromagnetic interference (EMI). * **Robustness:** The solid structure provides excellent resistance to mechanical shock and vibration. * **AEC-Q200 Compliance:** Most parts in this series are qualified for automotive use, meaning they handle extreme thermal cycling well. --- ### 3. Part Number Breakdown The part number can be decoded as follows: | Segment | Meaning | | :--- | :--- | | **MPT** | Series Code (Molded Power Inductor) | | **135** | Case Size (Approx. 13.5mm x 12.5mm x 5.0mm) | | **R68** | Inductance Value (R is decimal point = 0.68 Microhenries) | | **H1** | Modification/Tolerance code (Often refers to specific high-temp or low-profile variants) | --- ### 4. Common Applications Due to its high current handling and low profile, the MPT135-R68H1 is commonly found in: * **DC/DC Converters:** Used as the energy storage element in buck/boost converters. * **Voltage Regulator Modules (VRM):** Supplying high-current power to CPUs or GPUs. * **Automotive Systems:** LED lighting drivers, infotainment systems, and ADAS modules. * **Power Supplies:** High-efficiency switch-mode power supplies (SMPS). ---