The part number **0603CS-R12XGLW** refers to a high-frequency, wirewound surface-mount (SMD) inductor manufactured by **Coilcraft**. This specific component is part of the 0603CS series, known for high Q factors and tight tolerances. ### 1. Part Number Breakdown The alphanumeric code follows a specific naming convention: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **0603** | Size Code | EIA Package size 0603 (1.6 x 0.8 mm) | | **CS** | Series | Ceramic core, wirewound construction | | **-R12** | Inductance | R12 = 0.12 µH or **120 nH** | | **X** | Tolerance | **±5%** (Standard tolerance) | | **G** | Termination | Gold over nickel (RoHS compliant) | | **L** | Packaging | Tape & Reel (typically 7" reel) | | **W** | Environmental | Halogen-free and RoHS compliant | --- ### 2. Technical Specifications The "CS" series is designed for RF applications where signal integrity and low loss are critical. | Parameter | Value | | :--- | :--- | | **Inductance** | 120 nH | | **Q Factor (Min)** | 60 @ 350 MHz | | **Self Resonant Frequency (Min)** | 1300 MHz (1.3 GHz) | | **DC Resistance (DCR Max)** | 0.650 Ohms | | **Current Rating (Imax)** | 300 mA | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Physical Characteristics * **Construction:** These are wirewound inductors with a ceramic core. Unlike multilayer inductors, wirewound versions offer much higher Q factors and higher current-handling capabilities. * **Dimensions:** * **Length:** 1.60 mm * **Width:** 1.12 mm (Max) * **Height:** 1.02 mm (Max) ### 4. Typical Applications Due to the high SRF (Self Resonant Frequency) and high Q, this part is commonly found in: 1. **RF Matching Circuits:** Used in impedance matching for antennas. 2. **Filters:** Low-pass, high-pass, and band-pass filters for wireless communication. 3. **VCOs:** Voltage Controlled Oscillators. 4. **Bluetooth/WLAN Modules:** High-frequency signal conditioning. ---