The **FSLM2520-R22J** is a high-precision wire-wound chip inductor manufactured by TDK Corporation. It is commonly used in high-frequency circuits for signal processing and telecommunications. --- ### 1. Part Number Breakdown Understanding the nomenclature helps identify its specific electronic characteristics: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **FSLM** | Series Name | TDK Wire-wound inductor for signal lines | | **2520** | Case Size | 2.5mm x 2.0mm (EIA 1008) | | **R22** | Inductance Value | 0.22 µH (Microhenries) | | **J** | Tolerance | ±5% | --- ### 2. Technical Specifications Below are the key electrical and physical parameters of this component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.22 µH | | **Tolerance** | ±5% | | **DC Resistance (Max)** | 0.35 Ω | | **Rated Current (Max)** | 450 mA | | **Self-Resonant Frequency (Min)** | 450 MHz | | **Q Factor (Min)** | 30 (at 25.2 MHz) | | **Operating Temp Range** | -40°C to +85°C | --- ### 3. Key Features and Applications The FSLM series is designed with specific manufacturing techniques that provide unique advantages in electronic design. #### Features: * **Wire-wound Construction:** Provides higher Q (Quality) factors and lower DC resistance compared to multilayer inductors. * **Magnetic Shielding:** While compact, the design minimizes electromagnetic interference (EMI). * **Excellent Solderability:** Designed for automated surface mount technology (SMT) reflow soldering. #### Applications: 1. **Telecommunications:** Used in mobile phones and base stations. 2. **Signal Filtering:** Ideal for RF (Radio Frequency) circuits to block high-frequency noise while passing DC. 3. **Impedance Matching:** Used in antenna circuits to ensure maximum power transfer. 4. **Consumer Electronics:** Found in TVs, VCRs, and digital cameras for signal processing. --- ### 4. Footprint and Dimensions For PCB layout designers, the 2520 metric size corresponds to the following dimensions: * **Length:** 2.50 mm (±0.2mm) * **Width:** 2.00 mm (±0.2mm) * **Thickness:** 1.80 mm (±0.2mm)