The **C1206X393DGGACTU** is a high-precision, surface-mount Multilayer Ceramic Capacitor (MLCC) manufactured by **KEMET**. This specific part belongs to the "FT-CAP" (Flexible Termination) series, designed for high-reliability applications. --- ## 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | KEMET | | **Series** | FT-CAP, COG Dielectric | | **Capacitance** | 39,000 pF (0.039 µF) | | **Tolerance** | ±0.5% (Very High Precision) | | **Voltage Rating** | 2000V (2 kV) | | **Case Code (Inch/Metric)** | 1206 / 3216 | | **Dielectric Material** | C0G (NP0) - Ultra-Stable | | **Operating Temperature** | -55°C to +125°C | | **Termination** | Flexible (Flexible Termination) | --- ## 2. Part Number Breakdown To understand the electronic characteristics, we can decode the KEMET part number: | Code Segment | Meaning | Details | | :--- | :--- | :--- | | **C** | Ceramic | Type of capacitor. | | **1206** | Case Size | 0.12 x 0.06 inches (3.2 x 1.6 mm). | | **X** | FT-CAP | Indicates **Flexible Termination** for stress resistance. | | **393** | Capacitance | 39 followed by 3 zeros (39,000 pF). | | **D** | Tolerance | ±0.5% (Extremely precise). | | **G** | Voltage | 2000V (High Voltage). | | **G** | Dielectric | C0G (Non-polar, zero drift). | | **A** | Failure Rate | Standard (A = N/A). | | **C** | Termination | Standard Nickel Barrier/Tin Plating. | | **TU** | Packaging | 7" Reel / Unmarked. | --- ## 3. Key Electronic Characteristics ### A. C0G (NP0) Dielectric Stability Unlike X7R or Y5V capacitors, the C0G dielectric is **Class I**. This means: * **Zero Temperature Drift:** The capacitance does not change significantly with temperature. * **No Voltage Coefficient:** The capacitance remains constant even as the applied voltage increases. * **Low Aging:** It does not lose capacitance over time. ### B. Flexible Termination (FT-CAP) The "X" in the part number signifies a silver-epoxy layer between the ceramic body and the outer tin plating. This allows the component to **bend (flex)** slightly without the ceramic cracking. This is critical for: * High-vibration environments. * Large PCBs that may warp during assembly. * Automotive or industrial power supplies. ### C. High Voltage Rating With a **2000V** rating, this capacitor is designed for power conversion, snubber circuits, and high-frequency filtering where high-voltage spikes or steady-state high voltages are present. --- ## 4. Typical Applications * **Resonant Circuits:** Due to the ±0.5% tolerance and C0G stability. * **Snubber Circuits:** In high-voltage DC-DC converters. * **Filtering:** High-frequency noise suppression in power supplies. * **Automotive/Industrial:** Where mechanical stress and reliability are primary concerns.