The part number **0603CS-R11XGRY** refers to a high-frequency, wirewound ceramic chip inductor manufactured by **Coilcraft**. This specific component is part of the 0603CS series, widely used in RF (Radio Frequency) applications. --- ### 1. Part Number Breakdown To understand the technical specifications, we can decode the part number: | Segment | Code | Meaning | | :--- | :--- | :--- | | **Size** | 0603 | Imperial size (0.06 x 0.03 inches / 1.6 x 0.8 mm) | | **Series** | CS | Ceramic core, Square body, wirewound | | **Inductance** | R11 | 110 nH (R denotes the decimal point in µH; R11 = 0.11 µH) | | **Tolerance** | G | ±2% Tolerance | | **Termination** | R | RoHS compliant matte tin over nickel over silver-platinum-glass frit | | **Packaging** | Y | 7″ machine-ready plastic reel (typically 2000 parts per reel) | --- ### 2. Key Technical Specifications Below are the typical electrical characteristics for this specific 110 nH inductor: | Parameter | Value | | :--- | :--- | | **Inductance** | 110 nH @ 150 MHz | | **Tolerance** | ±2% | | **Quality Factor (Q) Min** | 48 @ 150 MHz | | **SRF (Self-Resonant Frequency) typ** | 1650 MHz | | **DCR (Direct Current Resistance) max** | 0.520 Ohms | | **Irms (Maximum DC Current)** | 400 mA | | **Operating Temperature** | -40°C to +125°C | --- ### 3. Physical Construction and Features * **Ceramic Core:** Unlike ferrite cores, ceramic cores do not saturate and provide exceptional thermal stability and a high Self-Resonant Frequency (SRF). * **Wirewound Design:** The copper wire is wound around the ceramic body, which results in much higher **Q factors** and lower **DCR** compared to multilayer or thick-film inductors. * **Encapsulation:** These parts often feature a clear epoxy "top hat" or coating to allow for vacuum pick-and-place assembly. --- ### 4. Typical Applications This component is designed for high-frequency circuits where precision and low loss are critical. Typical use cases include: * **Impedance Matching:** Used in the front-end of RF transceivers to match antenna impedance. * **Filtering:** Low-pass, high-pass, or band-pass filters in wireless communication devices. * **Oscillators:** Frequency-determining elements in VCOs (Voltage Controlled Oscillators). * **Mobile Tech:** Smartphones, Wi-Fi modules, and Bluetooth devices. ---