The **TMPC0502HP-R10YG-D** is a high-current, low-profile power inductor typically used in DC-DC converter applications. It belongs to the molded power choke family, known for high efficiency and magnetic shielding. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's physical and electrical characteristics: | Code Segment | Description | Specific Value | | :--- | :--- | :--- | | **TMPC** | Series Name | Tai-Tech Molded Power Choke | | **0502** | Dimensions | Approx. 5.4 x 5.2 mm (Footprint) | | **HP** | Type/Material | High Power / High Saturation version | | **R10** | Inductance Value | 0.10 $\mu$H (Microhenries) | | **Y** | Tolerance | $\pm$ 30% | | **G** | Plating/Process | Green (RoHS Compliant / Halogen Free) | | **D** | Internal Code | Design or Manufacturing revision | --- ### 2. Technical Specifications These parts are designed for high-frequency power supplies where space is limited but current demands are high. * **Inductance:** 0.10 $\mu$H * **DC Resistance (DCR):** Extremely low (typically < 3.0 m$\Omega$), which minimizes power loss through heat. * **Saturation Current ($I_{sat}$):** Very high, often exceeding 20A–30A. This is the point where inductance drops by a specific percentage (usually 30%). * **Heat Rating Current ($I_{rms}$):** The current that causes a 40°C temperature rise. * **Operating Temperature:** Generally rated from -40°C to +125°C. --- ### 3. Key Features * **Molded Construction:** The coil is encapsulated in a magnetic metal powder. This reduces "buzz" noise (acoustic noise) and provides excellent magnetic shielding to prevent EMI (Electromagnetic Interference). * **Low Profile:** The "02" in the size code indicates a height of approximately 2.0 mm, making it suitable for thin devices like laptops or tablets. * **Soft Saturation:** Unlike ferrite drum cores, these molded inductors saturate gracefully, meaning they don't lose all inductance suddenly when current spikes. --- ### 4. Common Applications * **Voltage Regulator Modules (VRM):** For CPUs and GPUs. * **DC/DC Converters:** Distributed power systems and point-of-load (POL) converters. * **Portable Electronics:** Smartphones, tablets, and ultra-thin laptops. * **Automotive:** Infotainment systems and LED lighting drivers.