The **CW252016-R68J** is a high-frequency wire-wound chip inductor commonly used in RF (Radio Frequency) circuits. It is designed for surface-mount applications where high performance and stability are required. ### Technical Specifications Breakdown | Parameter | Value | Description | | :--- | :--- | :--- | | **Inductance** | 0.68 µH (680 nH) | The nominal inductance value. | | **Tolerance** | ±5% (J) | The allowable deviation from the nominal value. | | **Case Size** | 1008 (Metric 2520) | Dimensions: 2.5mm x 2.0mm x 1.6mm. | | **Q Factor (Min)** | 25 | Indicates the efficiency at a specific frequency (usually 25.2 MHz). | | **SRF (Min)** | 188 MHz | Self-Resonant Frequency; the limit for inductive behavior. | | **DC Resistance (Max)** | 1.15 Ω | The resistance of the wire winding at DC. | | **Rated Current** | 200 - 300 mA | Maximum continuous current it can handle without overheating. | --- ### Key Features and Construction 1. **Wire-Wound Construction:** Unlike multilayer inductors, wire-wound versions provide significantly higher **Q factors** (quality factor) and lower DC resistance, making them ideal for signal integrity. 2. **Ceramic Core:** Usually built on a ceramic alumina body, which provides excellent thermal stability and high SRF. 3. **Encapsulation:** Often features an epoxy coating or a "top-cap" to protect the fine wire and allow for vacuum pick-and-place assembly. ### Common Applications * **RF Communication:** Used in cellular phones, Wi-Fi modules, and Bluetooth devices. * **Impedance Matching:** Tuning circuits to ensure maximum power transfer between stages. * **Filtering:** High-pass, low-pass, and band-pass filters in high-frequency signal paths. * **Oscillators:** Serving as a frequency-determining component in LC tank circuits. --- ### Part Number Decoder (Typical for Bourns/CW Series) | Segment | Meaning | Detail | | :--- | :--- | :--- | | **CW** | Series | Ceramic Wire-wound | | **252016** | Size | 2.5 x 2.0 x 1.6 mm | | **R68** | Inductance | R is the decimal point (0.68 µH) | | **J** | Tolerance | J = ±5% |