The **TMPC0502HP-R68MG-D** is a high-current, shielded power inductor typically used in DC-DC converters, power supplies, and voltage regulator modules (VRMs). ### 1. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics of the component: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **TMPC** | Series Name | Tai-Tech Molded Power Choke (High Performance) | | **0502** | Physical Size | Approx. 5.4mm x 5.2mm | | **HP** | Type/Material | High Power / High Saturation series | | **R68** | Inductance Value | 0.68 µH | | **M** | Tolerance | ±20% | | **G** | Plating/Standard | Green (RoHS compliant / Halogen-free) | | **D** | Internal Code | Manufacturing or Design revision code | --- ### 2. Technical Specifications While exact values can vary slightly by manufacturer batch, the "0502HP-R68" generally follows these parameters: * **Inductance:** 0.68 µH * **DC Resistance (DCR):** Typically very low (approx. 10–15 mΩ) to minimize power loss. * **Saturation Current ($I_{sat}$):** The current at which inductance drops by ~30%. Usually ranges between **10A to 15A** for this size. * **Heat Rating Current ($I_{rms}$):** The current that causes a 40°C temperature rise. Usually around **8A to 12A**. * **Operating Temperature:** Typically -40°C to +125°C. --- ### 3. Key Features & Construction #### **Molded Construction** Unlike traditional wire-wound inductors with an open core, the TMPC series uses a **metal powder molding** technology. The copper coil is placed inside a mold, and magnetic iron powder is pressed around it. * **Magnetic Shielding:** The molded body acts as a natural shield, reducing Electromagnetic Interference (EMI). * **Ruggedness:** Higher resistance to mechanical shock and vibration. * **Acoustic Noise Reduction:** The solid structure minimizes "buzzing" caused by magnetostriction. #### **Soft Saturation** Because of the iron powder core, the inductor exhibits "soft saturation." Instead of a sharp drop in inductance when the current limit is reached, it decreases gradually, protecting the circuit from sudden current spikes. --- ### 4. Typical Applications The TMPC0502HP-R68MG-D is designed for high-density power electronics where space is limited but current demands are high: 1. **Laptops and Tablets:** CPU/GPU core power supplies. 2. **Point of Load (POL) Converters:** Converting 12V or 5V rails to lower voltages (1.8V, 1.2V, etc.). 3. **Graphic Cards:** High-efficiency VRM phases. 4. **SSD Power Supplies:** Providing stable current in a compact footprint. ---