The **C520-3-R** is a high-performance, leaded (through-hole) power inductor manufactured by **Eaton (formerly Bussmann)**. It belongs to the C520 series, which is specifically designed for high-current applications where small size and low power loss are critical. --- ### ## Technical Specifications Below is a breakdown of the primary electrical and physical characteristics of the C520-3-R: | Parameter | Value | | :--- | :--- | | **Inductance** | 3.0 µH | | **Current Rating (rms)** | 5.0 Amperes | | **Peak Current (Isat)** | 8.0 Amperes | | **DC Resistance (DCR)** | 0.015 Ohms (Max) | | **Mounting Type** | Through-Hole (Axial Leaded) | | **Operating Temp** | -40°C to +125°C | | **Material** | Ferrite Core | --- ### ### Core Features * **High Efficiency:** The ferrite core construction ensures low core losses, making it ideal for high-frequency power conversion. * **RoHS Compliant:** The "-R" suffix indicates that the part is fully compliant with RoHS (Restriction of Hazardous Substances) standards. * **Compact Form Factor:** The axial leaded design allows for vertical or horizontal mounting on PCBs where surface mount space might be limited or where mechanical stability is needed. * **Stable Performance:** Designed to maintain inductance stability across a wide range of operating temperatures. --- ### ### Typical Applications The C520-3-R is commonly found in circuits requiring energy storage or EMI filtering, such as: 1. **Buck/Boost Converters:** Used as the primary energy storage element in DC-DC power supplies. 2. **Output Filters:** Smoothing out current ripples in switching power supplies. 3. **EMI Suppression:** Filtering high-frequency noise in consumer electronics and industrial controls. 4. **Voltage Regulators:** Providing stable current for microprocessors and peripheral components. --- ### ### Identification & Part Numbering The Eaton C520 series follows a specific naming convention: * **C520:** Series designation (Power Inductor). * **3:** Inductance value (in this case, 3.0 microhenries). * **-R:** RoHS compliance indicator.