## Technical Overview: FSLM2520-R82J The **FSLM2520-R82J** is a surface-mount (SMD) wire-wound chip inductor manufactured by **TDK**. It belongs to the FSLM series, which is specifically designed for high-frequency signal applications, often used in telecommunications and consumer electronics. --- ### 1. Key Technical Specifications The part number itself contains encoded information regarding its size and performance. | Parameter | Specification | | :--- | :--- | | **Inductance** | 0.82 µH | | **Tolerance** | ±5% (indicated by the 'J' suffix) | | **Case Size (Metric)** | 2520 (2.5mm x 2.0mm) | | **Case Size (Imperial)** | 1008 | | **DC Resistance (Max)** | 0.55 Ω | | **Rated Current** | 225 mA | | **Q-Factor (Min)** | 30 (at 25.2 MHz) | | **Self-Resonant Frequency** | 185 MHz | --- ### 2. Physical Construction The FSLM2520-R82J is a **wire-wound** inductor. This construction offers specific advantages over multilayer types: * **Core Material:** Ferrite core, which provides high magnetic flux and stability. * **Terminations:** Tin-plated electrodes for excellent solderability. * **Shielding:** It is typically non-shielded, though the wire is protected by a resin coating for mechanical durability. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying similar components: | Segment | Meaning | | :--- | :--- | | **FSLM** | Series name (Signal line wire-wound inductor) | | **2520** | Physical dimensions (2.5mm length x 2.0mm width) | | **R82** | Inductance value (R = decimal point; 0.82 µH) | | **J** | Inductance tolerance (J = ±5%) | --- ### 4. Common Applications Due to its high Q-factor and stable inductance in the RF range, this part is commonly found in: 1. **Mobile Communications:** Smartphones and base stations. 2. **Audio/Video:** Signal processing circuits in TVs and camcorders. 3. **Computing:** Hard disk drives and peripheral interfaces. 4. **Filters:** Used in LC filter circuits to suppress high-frequency noise or select specific frequencies. ---