The **CW252016-R22J** is a high-frequency, surface-mount (SMD) wire-wound chip inductor. It is commonly used in RF (Radio Frequency) communication circuits where high precision and stable performance are required. --- ### 1. Part Number Breakdown The part number follows a specific nomenclature used by manufacturers like **Bourns** or **Pulse Electronics**: | Code | Meaning | Description | | :--- | :--- | :--- | | **CW** | Series Type | Chip Wire-wound Inductor | | **252016** | Case Size | Dimensions: 2.5mm x 2.0mm x 1.6mm (Metric) | | **R22** | Inductance Value | R denotes decimal: 0.22 µH (or 220 nH) | | **J** | Tolerance | ±5% | --- ### 2. Technical Specifications These are the typical electrical characteristics for this component: | Parameter | Value | | :--- | :--- | | **Inductance** | 0.22 µH (220 nH) | | **Tolerance** | ±5% | | **Q-Factor (Min)** | 25 - 45 (at specified frequency) | | **SRF (Self Resonant Frequency)** | ~450 MHz to 900 MHz (typical) | | **DCR (DC Resistance)** | ~0.50 - 0.70 Ohms (Max) | | **Rated Current** | ~400 mA - 500 mA | | **Operating Temp** | -40°C to +125°C | --- ### 3. Physical Construction The "Wire-wound" nature of this part provides several advantages over multilayer ceramic inductors: * **Core Material:** Usually a ceramic or ferrite core depending on the specific frequency range. * **Winding:** Fine copper wire is wound around the core, offering higher **Q (Quality Factor)** and lower DC resistance. * **Termination:** Features solder-plated metal terminals on the ends for SMD mounting. --- ### 4. Common Applications Due to its high Q-factor and stable inductance, the CW252016-R22J is typically found in: * **RF Transceivers:** Used in matching networks and filters. * **Wireless Communication:** WiFi, Bluetooth, and GPS modules. * **Broadband Equipment:** Cable modems and set-top boxes. * **VCOs:** Voltage Controlled Oscillators requiring high stability. ---