The **C515-7-R** is a specific electronic component belonging to the **Power Inductor** family, manufactured by **Eaton (formerly Bussmann)**. It is a surface-mount (SMD) device designed for high-frequency power conversion applications. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the C515-7-R: | Parameter | Value/Detail | | :--- | :--- | | **Inductance** | 7.0 µH | | **Tolerance** | ±20% | | **DC Resistance (DCR)** | ~0.026 Ohms (Max) | | **Saturation Current ($I_{sat}$)** | ~5.5 Amperes | | **RMS Current ($I_{rms}$)** | ~4.1 Amperes | | **Operating Temperature** | -40°C to +125°C | | **Package / Case** | 12.5mm x 12.5mm x 6.0mm (Approx) | --- ### 2. Functional Characteristics The "C515" series is known for several specific engineering advantages: * **Shielded Construction:** The part features a ferrite core construction that provides magnetic shielding. This is critical for minimizing **Electromagnetic Interference (EMI)** in sensitive circuits. * **High Power Density:** Despite its relatively small footprint, it can handle significant current, making it ideal for compact power supplies. * **Low DCR:** The low direct current resistance ensures minimal energy loss as heat, improving the overall efficiency of the power stage. --- ### 3. Common Applications The C515-7-R is typically used as a filter or energy storage element in the following scenarios: 1. **DC-DC Converters:** Used in buck (step-down) or boost (step-up) regulators to smooth output voltage. 2. **Voltage Regulator Modules (VRM):** Found in server and workstation motherboards to provide stable power to CPUs. 3. **Industrial Electronics:** Utilized in PLC power supplies and motor control circuits due to its robustness. 4. **LED Drivers:** Used to maintain constant current flow in high-power lighting applications. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **C515:** The series designation (refers to the physical dimensions and core material). * **7:** Indicates the nominal inductance value (7.0 µH). * **-R:** Signifies compliance with **RoHS** (Restriction of Hazardous Substances) standards (Lead-free).