The part number **C0805Y393DGGACTU** refers to a specific Multi-Layer Ceramic Capacitor (MLCC) manufactured by **KEMET**. This component belongs to their Floating Electrode (FE-CAP) series, which is designed for high-reliability applications where board flexure or mechanical stress is a concern. --- ## 1. Technical Specification Breakdown The part number follows a specific coding convention. Below is the breakdown of its technical characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Case Size** | 0805 (2012 Metric) | Dimensions: 2.00mm x 1.25mm. | | **Capacitance** | 39 nF (0.039 µF) | "393" = 39 followed by 3 zeros in picofarads. | | **Tolerance** | ±0.5 pF / D | Tight precision tolerance. | | **Voltage** | 2,000 V (2 kV) | High voltage rating (indicated by "G"). | | **Dielectric** | C0G (NP0) | Ultra-stable, non-ferroelectric material. | | **Termination** | Matte Tin (Sn) | Standard solderable finish. | | **Packaging** | 7" Reel / Plastic Tape | Standard automated assembly format. | --- ## 2. Key Technology: Floating Electrode (FE-CAP) The "**Y**" in the part number signifies the **Floating Electrode** design. This is a safety-critical feature: * **Mechanical Protection:** If the PCB flexes and the capacitor cracks, the internal "cascaded" electrode structure prevents a short circuit. * **Fail-Safe:** Instead of failing as a short (which can lead to fire or circuit damage), it typically fails as an open circuit or with a slight drop in capacitance. --- ## 3. Dielectric Characteristics (C0G/NP0) Because this part uses **C0G** dielectric material, it offers superior performance compared to X7R or Y5V capacitors: 1. **Temperature Stability:** Capacitance does not change with temperature (-55°C to +125°C). 2. **No DC Bias Effect:** Capacitance remains constant regardless of the applied DC voltage. 3. **Low ESR/ESL:** Ideal for high-frequency applications and power efficiency. --- ## 4. Typical Applications Given its high voltage rating (2kV) and stable C0G dielectric, this part is commonly used in: * **Power Supplies:** Snubber circuits in DC/DC converters. * **High Voltage Coupling:** Decoupling in telecommunication and lighting ballasts. * **Precision Filtering:** Circuits requiring exact timing or frequency response. * **Automotive/Industrial:** Areas prone to high vibration or mechanical stress. ---