The part number **0603CS-R27XGLW** refers to a high-frequency, wire-wound ceramic core chip inductor manufactured by **Coilcraft**. This specific series is widely used in RF (Radio Frequency) circuits due to its high Q-factors and tight tolerances. --- ### 1. Part Number Breakdown Understanding the alphanumeric code helps identify the specific characteristics of the component: | Code Segment | Meaning | Details | | :--- | :--- | :--- | | **0603** | Case Size | 0603 Imperial (1608 Metric): 1.6mm x 0.8mm | | **CS** | Series Type | Ceramic core, Square-profile wire-wound inductor | | **R27** | Inductance Value | **270 nH** (R denotes decimal: R27 = 0.27µH) | | **X** | Termination | Tin-Silver-Copper over Silver-Platinum-Glass frit | | **G** | Tolerance | **±2%** (Precision tolerance) | | **L** | Testing/Packaging | Low profile / Standard testing | | **W** | Packaging Type | Tape and Reel (Standard) | --- ### 2. Technical Specifications These values represent the electrical behavior of the inductor under standard operating conditions: | Parameter | Value | | :--- | :--- | | **Inductance** | 270 nH | | **Tolerance** | ±2% | | **Quality Factor (Q min)** | 48 @ 250 MHz | | **SRF (Self-Resonant Freq)** | 1100 MHz (Typical) | | **DCR (DC Resistance)** | 1.10 Ohms (Max) | | **Irms (Rated Current)** | 350 mA | | **Core Material** | Ceramic | --- ### 3. Key Features and Applications #### Key Features * **Wire-Wound Construction:** Provides significantly higher Q-factors and current handling compared to multilayer or thick-film inductors. * **Ceramic Core:** Ensures exceptional thermal stability and a high Self-Resonant Frequency (SRF), making it ideal for high-frequency applications. * **Tight Tolerance:** The "G" rating (±2%) allows for precise tuning in sensitive RF filters and oscillators. #### Common Applications * **RF Impedance Matching:** Used in the matching networks of antennas for Wi-Fi, Bluetooth, and cellular modules. * **Filters:** High-pass, low-pass, and band-pass filters in communication devices. * **Oscillators:** Frequency generation circuits where stability is critical. * **Chokes:** Decoupling high-frequency noise in power lines. --- ### 4. Sample Landing Pattern (Reference) The 0603 footprint requires specific PCB dimensions for optimal soldering: ```text <-- 0.8mm --> +-------------+ ^ | [ Pad A ] | 1.6mm | | v | [ Pad B ] | +-------------+ ```