The part number **2-4R3N-R** typically refers to a **Fixed Inductor** (Surface Mount Device - SMD) belonging to a high-current power inductor series. These components are essential in power management for regulating voltage and storing energy. --- ### 1. Part Number Breakdown (Typical Syntax) In the electronics industry, specifically for manufacturers like *Coiltronics (Eaton)* or similar high-power inductor brands, the nomenclature breaks down as follows: | Segment | Meaning | Description | | :--- | :--- | :--- | | **2** | Series Size | Refers to the physical dimensions/frame size of the component. | | **4R3** | Inductance Value | **4.3 µH** (The 'R' acts as a decimal point). | | **N** | Tolerance | Typically ±30% (though standard tolerances vary by series). | | **-R** | Compliance | Indicates **RoHS Compliant** (Lead-free). | --- ### 2. Technical Specifications While exact specs can vary by manufacturer, a standard "2-4R3" power inductor generally features the following characteristics: * **Type:** Shielded Drum Core Power Inductor. * **Inductance:** 4.3 Microhenries (µH). * **DC Resistance (DCR):** Usually very low (mΩ range) to minimize power loss. * **Saturation Current:** High (often 2A to 10A+ depending on the specific series height). * **Operating Temperature:** Typically -40°C to +125°C. --- ### 3. Common Applications These inductors are designed for circuits requiring high efficiency and compact size: 1. **DC-DC Converters:** Used in "Buck" (step-down) or "Boost" (step-up) converters to smooth out current ripples. 2. **Voltage Regulator Modules (VRMs):** Found on computer motherboards and graphics cards to provide stable power to CPUs/GPUs. 3. **Battery Powered Devices:** Used in tablets and smartphones due to their low profile and high efficiency. 4. **LED Drivers:** Used to maintain constant current flow for high-brightness lighting. --- ### 4. Key Advantages * **Magnetic Shielding:** Reduces Electromagnetic Interference (EMI), preventing the inductor from affecting nearby sensitive components. * **High Power Density:** Large current handling capability relative to its small surface-mount footprint. * **Low Core Loss:** Optimized for high-frequency switching environments. ---