The **TPI13067F-R40M** is a high-current, fixed power inductor primarily used in voltage regulator modules (VRMs) and DC-DC converters. It is designed for high-frequency power electronics applications where efficiency and compact size are critical. --- ### 1. Technical Specifications The part number follows a specific coding convention that defines its electrical and physical properties. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.40 µH (Microhenries) | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | Typ: 0.165 mΩ / Max: 0.185 mΩ | | **Saturation Current ($I_{sat}$)** | ~61A to 80A (depending on temperature rise) | | **Operating Temperature** | -40°C to +125°C | | **Dimensions** | Approx. 13.5 x 13.0 x 6.7 mm | --- ### 2. Key Features and Materials The "TPI" series is known for its **ferrite core construction**, which offers several advantages over traditional iron powder inductors: * **Flat Wire Technology:** It utilizes a flat copper wire winding. This increases the surface area, reducing the **Skin Effect** and significantly lowering DC resistance (DCR), which minimizes power loss. * **High Saturation:** The core is engineered to handle high current spikes without the inductance dropping off sharply. * **Low Core Loss:** Ferrite materials provide lower core losses at high frequencies compared to composite materials, making it ideal for multi-phase buck converters. * **Shielded Construction:** The part is magnetically shielded to minimize Electromagnetic Interference (EMI) with surrounding components. --- ### 3. Common Applications This inductor is typically found in high-demand computing and industrial environments: 1. **Server & Data Centers:** Used in VRMs (Voltage Regulator Modules) for CPUs and GPUs. 2. **Point of Load (POL) Converters:** High-efficiency power supplies located near the integrated circuits they power. 3. **Graphic Cards:** Providing stable current for high-performance processing units. 4. **Telecommunications:** Base station power modules where reliability and efficiency are paramount. --- ### 4. Part Number Breakdown (Typical) * **TPI:** Series Name (Trans-Power Inductor). * **13067:** Physical dimensions (13mm x 6.7mm height). * **F:** Core Material/Series Designator (often denotes Ferrite). * **R40:** Inductance value (R40 = 0.40 µH). * **M:** Tolerance (M = ±20%).