The part number **57-5R3-R** typically refers to a **Power Inductor**, specifically from the **5700 Series** manufactured by companies like **Murata Power Solutions** (formerly C&D Technologies) or similar electronic component providers. --- ## Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Component Type** | Radial Lead Inductor | | **Inductance** | 5.3 µH (Microhenries) | | **Tolerance** | ±15% to ±20% (Typical) | | **Current Rating** | High Current (Approx. 8A - 10A DC) | | **DC Resistance (DCR)** | Very Low (Approx. 0.007 Ω) | | **Mounting Type** | Through-Hole (Radial Leads) | | **RoHS Compliant** | Yes (Indicated by the "-R" suffix) | --- ## Key Features ### 1. Construction These inductors are usually built with a **ferrite core** and heavy-gauge copper wire. The radial lead design allows them to be mounted vertically on a PCB, saving horizontal board space. ### 2. High Current Capability The "5R3" designation indicates a low inductance value (5.3 µH), which is optimized for high-frequency switching and high-current power paths without saturating the core easily. ### 3. Applications * **Switching Power Supplies:** Used for energy storage and filtering in DC-DC converters. * **EMI/RFI Filtering:** Acts as a low-pass filter to block high-frequency noise in power lines. * **Voltage Regulators:** Provides stability in point-of-load (POL) power modules. ### 4. Environmental Standards The **-R** suffix is a standard industry notation for **RoHS Compliance**, meaning the part is manufactured without lead, mercury, cadmium, or other hazardous substances. --- ## Part Number Breakdown | Segment | Meaning | | :--- | :--- | | **57** | Series Identifier (Murata 5700 series) | | **5R3** | Inductance Value (5.3. The 'R' acts as a decimal point) | | **-R** | RoHS Compliant / Lead-Free |