The **ECS-MPI4040R4-R33-R** is a high-performance, miniature power inductor manufactured by ECS Inc. International. It belongs to the **MPI4040 series**, which is designed for high-current power applications where space is limited and efficiency is critical. --- ### ## Technical Specifications The following table outlines the primary electrical and physical characteristics of this specific component: | Feature | Specification | | :--- | :--- | | **Inductance** | 0.33 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 4.3 mΩ (Typical) | | **Saturation Current ($I_{sat}$)** | 18.0 A | | **RMS Current ($I_{rms}$)** | 11.5 A | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.7 x 4.06 x 4.0 mm | | **Shielding** | Magnetically Shielded | --- ### ## Key Features & Construction 1. **Metal Alloy Construction:** Unlike traditional ferrite inductors, this part uses a metal alloy core. This allows for a **soft saturation** characteristic, meaning the inductance drops gradually rather than abruptly when current increases. 2. **Magnetic Shielding:** The molded construction provides excellent EMI (Electromagnetic Interference) shielding, making it ideal for high-density PCB layouts near sensitive components. 3. **High Current Density:** The "R33" (0.33 µH) version is optimized for very high current (up to 18A saturation), which is significant for its small 4040 footprint. 4. **Low DCR:** The low direct current resistance (4.3 mΩ) minimizes power loss and heat generation, increasing overall system efficiency. --- ### ## Common Applications This inductor is typically used in DC-DC converters and voltage regulator modules (VRMs). Specific applications include: * **Handheld Electronics:** Smartphones, tablets, and wearable tech. * **Computing:** Laptops, servers, and high-speed SSDs. * **Industrial IoT:** Compact sensors and communication modules. * **Point of Load (POL) Converters:** Providing stable power to FPGAs and CPUs. --- ### ## Part Number Breakdown * **ECS:** Manufacturer (ECS Inc. International). * **MPI4040:** Series and physical dimensions (approx. 4.0mm x 4.0mm). * **R4:** Revision or specific height profile (4.0mm height). * **R33:** Inductance value ($0.33$ microhenries). * **R:** Packaging (typically refers to Tape & Reel).