The **ECS-MPI4040R4-R22-R** is a high-efficiency, miniature power inductor manufactured by ECS Inc. International. It belongs to the MPI4040 series, which is characterized by its metal-alloy construction designed to handle high currents in a small surface-mount footprint. --- ### ## Technical Specifications Below are the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Inductance** | 0.22 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | 4.3 mΩ (Max) | | **Saturation Current (Isat)** | 18.0 A | | **Temperature Rise Current (Irms)** | 11.5 A | | **Operating Temperature** | -40°C to +125°C | | **Package Size** | 4.7 x 4.3 x 4.0 mm | | **Shielding** | Magnetically Shielded | --- ### ## Key Features & Construction 1. **Metal Alloy Core:** Unlike traditional ferrite inductors, this part uses a molded metal powder core. This allows for "soft saturation," meaning the inductance drops gradually rather than abruptly when current increases. 2. **Magnetic Shielding:** The molded construction inherently shields the component, reducing Electromagnetic Interference (EMI) with surrounding components on the PCB. 3. **High Power Density:** The "4040" profile indicates a high-profile square body (4.0mm height), which allows for a thicker wire gauge, leading to very low DC resistance (DCR) and high current handling. 4. **RoHS Compliant:** The "-R" suffix indicates full compliance with RoHS (Restriction of Hazardous Substances) standards. --- ### ## Common Applications This inductor is typically used in DC-to-DC converter circuits where space is limited but current demands are high. * **Point of Load (POL) Converters:** Used in motherboards and servers. * **Voltage Regulator Modules (VRMs):** Powering CPUs and GPUs. * **Battery Powered Devices:** High-efficiency power management for portable electronics. * **Field Programmable Gate Arrays (FPGAs):** Providing stable high-current rails. --- ### ## Part Number Breakdown `ECS - MPI4040 R4 - R22 - R` * **ECS:** Manufacturer (ECS Inc. International). * **MPI4040:** Series name and footprint size. * **R4:** Height code (approx. 4.0 mm). * **R22:** Inductance value (0.22 µH). * **-R:** RoHS compliant.