The part number **2291000-R** typically refers to a high-performance **Surface Mount (SMD) Power Inductor**, most commonly associated with manufacturers like *TE Connectivity* or specific industrial power component suppliers. These are critical components used for energy storage and filtering in power management circuits. ### 1. Technical Specifications Below are the generalized technical parameters for this class of component: | Feature | Specification (Typical) | | :--- | :--- | | **Inductance** | 1.0 µH (Common for this series) | | **Tolerance** | ±20% | | **Current Rating (Isat)** | High Saturation Current (Up to 30A+) | | **DC Resistance (DCR)** | Ultra-low (mΩ range) | | **Operating Temp** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Compliance** | RoHS Compliant (indicated by the "-R") | --- ### 2. Key Internal Components An inductor like the 2291000-R consists of several "electronic parts" integrated into one package: 1. **Magnetic Core:** Usually made of a carbonyl iron powder or ferrite composite. This core stores energy in a magnetic field. 2. **Copper Coil:** A thick, flat, or round copper wire wound inside. The thickness determines the current-carrying capacity. 3. **Terminations:** Solderable pads (usually tin-plated) that allow the part to be mounted onto a Printed Circuit Board (PCB). 4. **Molding Compound:** An epoxy or resin that encapsulates the coil and core to provide EMI shielding and physical protection. --- ### 3. Common Applications These parts are designed for high-efficiency power conversion. You will typically find them in: * **DC-DC Converters:** Helping to step down voltage in laptops and servers. * **Voltage Regulator Modules (VRMs):** Providing stable power to CPUs and GPUs. * **Automotive Electronics:** Used in infotainment and ADAS systems due to high temperature resistance. * **Industrial Power Supplies:** Filtering noise and smoothing output current. --- ### 4. Why the "-R" Suffix? In the electronics industry, the **-R** suffix almost always signifies: * **RoHS Compliance:** The part is free from lead and other hazardous substances. * **Tape and Reel Packaging:** The part is supplied on a plastic reel for use in automated "pick-and-place" assembly machines.