
Strong candidate with matching package, capacitance, voltage, tolerance, and stable C0G dielectric.
Finding a substitute for the CGA1206C0G102J102MT, a 1nF 1kV 1206 ceramic capacitor, requires matching its stable C0G dielectric. We've identified direct replacements and parametric alternatives with important caveats to consider.
Using an X7R dielectric instead of C0G introduces instability and wider tolerance, which is unacceptable for precision circuits.
All candidates use the standard 1206 package, ensuring physical compatibility.
Yes, TCC1206COG102J102DT is a strong candidate for a direct replacement, matching all key specifications including the critical C0G dielectric.
The best replacement path is to find another 1nF, 1000V, 1206 capacitor with a C0G (or NP0) dielectric, such as TCC1206COG102J102DT. This ensures performance stability.
The main risk is substituting with a capacitor that has a different dielectric material, such as X7R, which is less stable and can affect circuit performance.

Strong candidate with matching package, capacitance, voltage, tolerance, and stable C0G dielectric.
| Feature / factor | CGA1206C0G102J102MT | TCC1206COG102J102DT | FCC1206B102K202FT | TCC1206X7R102K102DTS | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 1206 | 1206 | 1206 | 1206 | 1206 — Package size matches.; FCC1206B102K202FT: Package size matches.; TCC1206X7R102K102DTS: Package size matches.; CC1206MKX7RDBB102: Package size matches. |
| Capacitance | 1nF | 1nF | - | - | 1nF — Capacitance value matches. |
| Voltage | 1000V | 1000V | 2000V | 1000V | 1000V / 2000V — Voltage rating matches.; FCC1206B102K202FT: Voltage rating is higher, which is acceptable.; TCC1206X7R102K102DTS: Voltage rating matches.; CC1206MKX7RDBB102: Voltage rating is higher, which is acceptable. |
| Tolerance | ±5% | ±5% | ±10% | ±10% | ±5% / ±10% / ±20% — Tolerance matches.; FCC1206B102K202FT: Tolerance is wider than target's ±5%.; TCC1206X7R102K102DTS: Tolerance is wider than target's ±5%.; CC1206MKX7RDBB102: Tolerance is much wider than target's ±5%. |
| Dielectric | C0G | COG | X7R | X7R | COG / X7R — Stable Class 1 dielectric matches (COG is equivalent to C0G).; FCC1206B102K202FT: Dielectric is less stable Class 2 (X7R) vs target's Class 1 (C0G).; TCC1206X7R102K102DTS: Dielectric is less stable Class 2 (X7R) vs target's Class 1 (C0G).; CC1206MKX7RDBB102: Dielectric is less stable Class 2 (X7R) vs target's Class 1 (C0G). |
The best alternative found is TCC1206COG102J102DT by CCTC. It matches the 1nF capacitance, 1000V rating, ±5% tolerance, 1206 package, and the critical C0G dielectric for stable performance.