The **TMPIT04020AF-R56M** is a high-performance, shielded power inductor typically used in DC-DC converter applications. It is designed for high-density power electronics where efficiency and small footprints are critical. --- ### 1. Part Number Deciphering The part number follows a specific nomenclature that describes its physical and electrical characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **TMPIT** | Series Name | High-current power inductor series (molded type). | | **04020** | Case Size | Dimensions approx. 4.0 x 4.0 x 2.0 mm. | | **AF** | Material/Design | Indicates specific core material or internal design revision. | | **R56** | Inductance Value | **0.56 µH** (R denotes the decimal point). | | **M** | Tolerance | **±20%** tolerance. | --- ### 2. Key Technical Specifications While exact values can vary slightly by manufacturer (commonly associated with brands like **Tai-Tech**), the general specifications for this part are: * **Inductance:** 0.56 µH * **DC Resistance (DCR):** Low (typically < 10-15 mΩ) to minimize power loss. * **Saturation Current (Isat):** The current at which inductance drops by 30%. Usually ranges from 8A to 12A for this size. * **Heat Rating Current (Irms):** The current that causes a 40°C temperature rise. Usually ranges from 6A to 10A. * **Operating Temperature:** -40°C to +125°C (including self-heating). --- ### 3. Construction and Features ### A. Magnetic Shielding The component is a **molded inductor**. This means the coil is embedded in a metallic powder composite. This provides: * Excellent magnetic shielding (low EMI interference). * High saturation current characteristics (soft saturation). ### B. Material Composition It typically uses a carbonyl iron or alloy powder core, which offers better stability over temperature compared to traditional ferrite cores. ### C. Surface Mount (SMD) The "04020" footprint is designed for automated SMT (Surface Mount Technology) assembly, making it ideal for compact PCB layouts. --- ### 4. Common Applications * **DC/DC Converters:** Used as the energy storage element in buck/boost regulators. * **Mobile Devices:** Smartphones and tablets due to the low profile. * **Computing:** Graphics cards, SSDs, and CPU power modules. * **Telecommunications:** Distributed power systems and base stations.