The part number **MLAST021SCG4R7CWNA01** refers to a specific Multi-Layer Ceramic Capacitor (MLCC) typically manufactured by companies like **AVX (Kyocera)** or specialized high-reliability component vendors. Based on standard electronic component naming conventions (specifically for high-frequency/microwave capacitors), here is a detailed breakdown of the part. --- ### 1. Component Specification Table | Attribute | Specification | Description | | :--- | :--- | :--- | | **Component Type** | MLCC | Multi-Layer Ceramic Capacitor | | **Capacitance** | 4.7 pF | "4R7" indicates the decimal point (R) | | **Tolerance** | ±0.25 pF | "C" code usually denotes ±0.25 pF (tight tolerance) | | **Voltage Rating** | 50V / 100V | Dependent on series (W usually indicates standard DC rating) | | **Dielectric** | C0G (NP0) | Ultra-stable, low loss, zero temperature drift | | **Case Size** | 0201 | Extremely small footprint (approx. 0.6mm x 0.3mm) | | **Termination** | Gold / Tin | "NA" often refers to specialized termination for soldering or bonding | --- ### 2. Breakdown of the Part Number The alphanumeric string is coded to provide manufacturing specifications: * **MLAS / MLAST:** Series identifier. This often refers to **Low ESR** or **High-Q** series designed for RF (Radio Frequency) applications. * **02:** Refers to the physical size (0201 EIA standard). * **1:** Voltage code (commonly 100V or 25V depending on the specific manufacturer's map). * **SCG:** Dielectric characteristic (likely a variant of C0G/NP0 for microwave stability). * **4R7:** The capacitance value. The 'R' acts as a decimal point ($4.7$ picofarads). * **C:** Tolerance code ($ \pm 0.25$ pF). * **W:** Packaging code (usually refers to 7" Reel). * **NA01:** Internal manufacturing control or special termination/testing code. --- ### 3. Key Electronic Characteristics #### A. High-Q Factor Because this part is likely an RF-grade capacitor, it possesses a **High Quality (Q) Factor**. This means it has very low **Equivalent Series Resistance (ESR)**, reducing energy loss in high-frequency circuits. #### B. C0G (NP0) Dielectric This is a Class I dielectric. It is highly stable: * **Temperature Coefficient:** $0 \pm 30 \text{ ppm/}^\circ\text{C}$. * **Aging:** Zero aging (the capacitance does not decrease over time). * **Voltage Coefficient:** Capacitance remains stable regardless of applied DC voltage. #### C. Typical Applications * **RF Matching Networks:** Tuning antennas in smartphones or IoT devices. * **High-Frequency Filtering:** Removing noise in 5G or Wi-Fi modules. * **Oscillators:** Providing stable frequency references. ---