The part number **C1206H393DGGALTU** refers to a high-temperature, surface-mount multilayer ceramic capacitor (MLCC) manufactured by **KEMET**. This specific component is part of their High-Temperature $200^{\circ}C$ series, designed for harsh environments. --- ### 1. Part Number Breakdown The alphanumeric string follows KEMET’s standard coding system: | Code | Meaning | Details | | :--- | :--- | :--- | | **C** | Series | Ceramic | | **1206** | Case Size | 1206 (3216 Metric) - $3.2mm \times 1.6mm$ | | **H** | High Temp | High Temperature Series ($200^{\circ}C$) | | **393** | Capacitance | 39,000 pF (or 39 nF / 0.039 µF) | | **D** | Tolerance | $\pm 0.5 pF$ (Note: Usually indicates tight precision) | | **G** | Voltage | 2000 Volts (High Voltage rating) | | **G** | Dielectric | C0G (NP0) - Ultra-stable | | **A** | Failure Rate | Not Applicable / Standard | | **L** | Termination | SnPb (Tin/Lead) coated over Nickel barrier | | **TU** | Packaging | 7" Reel / Unmarked | --- ### 2. Key Technical Specifications This capacitor is engineered for stability under extreme thermal and electrical stress. * **Capacitance:** 39 nF (0.039 µF). * **Voltage Rating:** 2,000 VDC (High Voltage). * **Dielectric Material:** **C0G (NP0)**. This is a Class I material, meaning it does not vary capacitance with respect to time or voltage and has a very predictable linear temperature coefficient. * **Operating Temperature Range:** $-55^{\circ}C$ to $+200^{\circ}C$. Most standard capacitors fail or degrade significantly above $125^{\circ}C$. * **Dissipation Factor:** Extremely low, which reduces self-heating in high-frequency applications. --- ### 3. Typical Applications Due to its high voltage rating and $200^{\circ}C$ temperature threshold, this part is used in specialized industrial and aerospace sectors: 1. **Downhole Drilling:** Used in oil and gas exploration electronics where ambient temperatures exceed standard industrial limits. 2. **Aerospace & Defense:** Power supplies and engine control units located near heat sources. 3. **High Voltage Snubbers:** Protecting MOSFETs or IGBTs in power converters. 4. **Resonant Circuits:** Used in high-frequency wireless charging or induction heating where stability is critical. --- ### 4. Comparison with Standard MLCCs Compared to a standard commercial capacitor (like an X7R dielectric), the **C1206H393DGGALTU** offers: * **Zero Piezoelectric Noise:** It does not vibrate or create "singing" noise under electrical stress. * **No Capacitance Aging:** The 39nF value remains constant over the life of the product. * **Higher Cost:** Specialized high-temperature materials and testing make this significantly more expensive than standard parts.