
Yageo
Same package and voltage, but lower capacitance. Poses a downgrade risk.
Finding a substitute for the CCTC TCC0603X7R684K500CT, a 680nF 50V 0603 ceramic capacitor, involves trade-offs. While no direct drop-in replacement exists, several alternatives with different capacitance or package sizes are available, requiring careful engineering review.
Capacitance mismatch can affect circuit timing, filtering, and stability.
Functional alternates in different packages require a new PCB layout.
No, a direct 1-to-1 replacement with identical key parameters in the same package was not found. All candidates require engineering review.
For existing PCBs, verify if higher capacitance (1µF) is acceptable. For new designs, use an electrically identical part in a different package.
Capacitance mismatch or package incompatibility.

Yageo
Same package and voltage, but lower capacitance. Poses a downgrade risk.
| Feature / factor | TCC0603X7R684K500CT | CC0603KRX7R9BB474 | CL10B105KB8NQNC | TCC0603X7R394K500CT | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0603 (1608 Metric) | 0603 (1608 metric) | 0603 | 0603 (1608 Metric) | 0603 (1608 metric) / 0603 (1608 Metric) / 0805 (2012 Metric) — Form-factor matches.; CL10B105KB8NQNC: Form-factor matches.; TCC0603X7R394K500CT: Form-factor matches.; TCC0805X7R684K500DT: Larger package requires PCB redesign. |
| Voltage | 50V | 50V | 50V | 50V | 50V — Voltage rating matches.; CL10B105KB8NQNC: Voltage rating matches.; TCC0603X7R394K500CT: Voltage rating matches.; TCC0805X7R684K500DT: Voltage rating matches. |
| Capacitance | 680nF | 470nF | 1µF | 390nF | 470nF / 1µF / 390nF / 680nF — Lower capacitance poses a risk to circuit stability.; CL10B105KB8NQNC: Higher capacitance may be acceptable in some decoupling applications.; TCC0603X7R394K500CT: Lower capacitance is a significant deviation and poses a risk.; TCC0805X7R684K500DT: Capacitance matches. |
| Dielectric | X7R | X7R | X7R | X7R | X7R — Temperature characteristic matches.; CL10B105KB8NQNC: Temperature characteristic matches.; TCC0603X7R394K500CT: Temperature characteristic matches.; TCC0805X7R684K500DT: Temperature characteristic matches. |
The best alternative depends on your design constraints. For new designs, TCC0805X7R684K500DT is electrically identical but in a larger 0805 package. For existing 0603 layouts, UMK107AB7105KA-T offers higher capacitance (1µF) which may be acceptable.