The **CW252016-R12J** is a high-frequency, wire-wound chip inductor commonly used in RF (Radio Frequency) communication circuits. This part is part of the CW252016 series, typically manufactured by companies like Bourns. Below is a detailed breakdown of its specifications and characteristics. ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the component's physical and electrical properties: | Segment | Meaning | Detail | | :--- | :--- | :--- | | **CW** | Type | Ceramic Wire-wound Inductor | | **252016** | Size (Metric) | 2.5mm x 2.0mm x 1.6mm (Approx. 1008 Imperial) | | **R12** | Inductance Value | 0.12 µH (120 nH) | | **J** | Tolerance | ±5% | --- ### 2. Technical Specifications These components are designed for high-performance applications where stability and high Q-factors are required. | Parameter | Value | | :--- | :--- | | **Inductance** | 120 nH (0.12 µH) | | **Tolerance** | ±5% | | **Quality Factor (Q min.)** | 45 (at 252 MHz) | | **Self-Resonant Frequency (SRF)** | 1100 MHz (Typical) | | **DCR (Max)** | 0.65 Ω | | **Rated Current (Idc)** | 450 mA | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Key Features * **High Q-Factor:** The wire-wound construction on a ceramic core provides a high Quality factor, which is essential for low signal loss in RF circuits. * **High SRF:** Its ability to maintain inductive properties at high frequencies (up to 1.1 GHz) makes it ideal for wireless applications. * **Physical Durability:** The ceramic body offers excellent thermal stability and mechanical strength. * **Small Footprint:** The 1008 (2520 metric) size allows for high-density PCB mounting. --- ### 4. Common Applications Due to its high frequency and precision characteristics, it is typically found in: 1. **RF Filter Circuits:** Used in band-pass or low-pass filters for signal conditioning. 2. **Impedance Matching:** Tuning antennas in mobile phones, Wi-Fi modules, and Bluetooth devices. 3. **Oscillators:** Providing stable inductance for VCOs (Voltage Controlled Oscillators). 4. **Amplifiers:** Decoupling and biasing in RF power amplifiers.