The **SWI0603F-R22J** is a surface-mount (SMD) wire-wound chip inductor. This component is widely used in high-frequency applications, such as RF (Radio Frequency) circuits, due to its high precision and stability. ### 1. Technical Specifications Table | Parameter | Specification | Details | | :--- | :--- | :--- | | **Series** | SWI | Standard Wire-wound Inductor | | **Package Size** | 0603 | 1.6mm x 0.8mm (Imperial) | | **Inductance** | 220 nH (0.22 µH) | Denoted by "R22" | | **Tolerance** | ±5% | Denoted by "J" | | **Quality Factor (Q)** | 25 (Min) | Measured at 100 MHz | | **SRF (Self Resonant Freq)** | 1000 MHz (Min) | Frequency where it stops behaving as an inductor | | **DCR (DC Resistance)** | 0.70 Ω (Max) | Internal resistance of the wire | | **Rated Current** | 250 mA (Max) | Maximum continuous current allowed | --- ### 2. Breakdown of the Part Number The alphanumeric code follows a specific industry standard for identification: * **SWI**: Series Prefix (Surface-mount Wire-wound Inductor). * **0603**: Physical dimensions (Length: 0.06", Width: 0.03"). * **F**: Ferrite Core or Material Type (varies by manufacturer, often indicating high-frequency performance). * **R22**: Inductance Value. "R" acts as a decimal point in microhenries (µH). Therefore, R22 = 0.22 µH, which is equivalent to **220 nH**. * **J**: Tolerance code. J represents **±5%**. --- ### 3. Key Characteristics & Applications * **Wire-wound Construction:** Unlike multilayer inductors, these use a physical wire coiled around a ceramic or ferrite core. This results in much higher **Q factors** and higher current handling capabilities. * **High Resonance:** The high Self-Resonant Frequency (SRF) makes it ideal for filtering and impedance matching in telecommunications. * **Common Uses:** * Cellular phones and wireless LANs. * RF modules and Bluetooth devices. * High-speed signal filtering. * Broadband communication equipment. --- ### 4. Handling and Soldering * **Moisture Sensitivity:** Typically rated at MSL 1 (unlimited shelf life at <30°C/85% RH). * **Soldering:** Compatible with standard Lead-Free (Pb-Free) reflow soldering profiles.