The part number **47LR-101B-R/Q** typically refers to a specific type of **Power Inductor**, most commonly associated with manufacturers like Sumida or similar magnetic component specialists. These components are designed to store energy in a magnetic field and are crucial for power management circuits. ### 1. Part Number Breakdown While naming conventions vary slightly by manufacturer, here is the standard breakdown for this series: | Segment | Meaning | Description | | :--- | :--- | :--- | | **47LR** | Series Type | Indicates a high-current, low-resistance power inductor series. | | **101** | Inductance Value | The first two digits are significant; the third is the multiplier ($10 \times 10^1$). **101 = 100 µH**. | | **B** | Tolerance | Typically represents a specific tolerance range (often $\pm 10\%$ or $\pm 20\%$). | | **R/Q** | Packaging/Revision | Indicates Reel packaging (R) and specific quality or design revisions (Q). | --- ### 2. Technical Specifications Inductors in this category generally share the following characteristics: * **Inductance:** 100 µH (Microhenries). * **Mounting Type:** Surface Mount Device (SMD). * **Core Material:** Ferrite (provides high efficiency and low core loss). * **Shielding:** Usually unshielded or semi-shielded, depending on the specific "47LR" sub-series footprint. * **DC Resistance (DCR):** Designed to be low to minimize power loss and heat generation. --- ### 3. Key Functions & Applications These components are primarily used in DC-DC conversion and power filtering. #### Typical Use Cases: 1. **Buck/Boost Converters:** Used to step voltage up or down in battery-powered devices. 2. **Noise Filtering:** Acts as a low-pass filter to block high-frequency noise in power lines. 3. **Energy Storage:** Temporarily stores energy in the form of a magnetic field during the switching cycle of a power supply. #### Common End Products: * LCD Televisions and Monitors. * Notebook computers and tablets. * DC/DC converter modules. * Embedded telecommunication systems. --- ### 4. Comparison Table: Inductor Types | Feature | Power Inductor (47LR) | Signal Inductor | | :--- | :--- | :--- | | **Current Handling** | High (Amps) | Low (Milliamps) | | **DCR** | Very Low | Moderate to High | | **Primary Goal** | Power Conversion | Signal Integrity / RF | | **Size** | Larger for heat dissipation | Miniature |