C1812C472KDRACTU vs C0805C221F5GACTU
| Part Number |
|
|
| Category | Ceramic Capacitors | Ceramic Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP CER 4700PF 1KV X7R 1812 | CAP CER 220PF 50V C0G/NP0 0805 |
| Package | 1812 (4532 Metric) | 0805 (2012 Metric) |
| Series | C | C |
| Features | High Voltage | Low ESL |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount, MLCC | Surface Mount, MLCC |
| Package / Case | 1812 (4532 Metric) | 0805 (2012 Metric) |
| Applications | General Purpose | General Purpose |
| Tolerance | ±10% | ±1% |
| Temperature Coefficient | X7R | C0G, NP0 |
| Size / Dimension | 0.177" L x 0.126" W (4.50mm x 3.20mm) | 0.079" L x 0.049" W (2.00mm x 1.25mm) |
| Voltage - Rated | 1000V (1kV) | 50V |
| Thickness (Max) | 0.061" (1.55mm) | 0.035" (0.88mm) |
| Capacitance | 4700pF | 220pF |
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1. What are ceramic capacitors used for?
Ceramic capacitors are widely used in various electronic devices, mainly for:
Coupling and decoupling: used in circuits to isolate DC signals while transmitting AC signals.
Filtering: remove noise from the power supply or smooth the output voltage.
Resonant circuit: such as oscillators in radio frequency (RF) circuits.
Temperature compensation: some types of ceramic capacitors have temperature coefficients that can be used to stabilize circuit performance.
Bypass: provide a low impedance path for high-frequency signals, thereby reducing the impact on other parts. -
2. Do ceramic capacitors deteriorate over time?
While ceramic capacitors are relatively stable, their capacitance value may decrease slightly over time, especially under extreme environmental conditions. However, this change is usually small and will not significantly affect most applications.
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3. Can I replace film capacitors with ceramic capacitors?
In many cases, ceramic capacitors can be used to replace film capacitors, especially when smaller size and lower cost are required. However, it is important to note that ceramic capacitors may have different temperature coefficients and self-healing characteristics, which may affect performance in a specific application.
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4. Does the voltage of ceramic capacitors matter?
Voltage ratings are critical to ensure safe operation. Using a capacitor below the rated voltage may cause premature failure; using a capacitor above the rated voltage may cause immediate damage.
