C1812C472KDRACTU vs C1812C104M1RACTU
| Part Number |
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| Category | Ceramic Capacitors | Ceramic Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP CER 4700PF 1KV X7R 1812 | CAP CER 0.1UF 100V X7R 1812 |
| Package | 1812 (4532 Metric) | 1812 (4532 Metric) |
| Series | C | C |
| Features | High Voltage | - |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount, MLCC | Surface Mount, MLCC |
| Package / Case | 1812 (4532 Metric) | 1812 (4532 Metric) |
| Applications | General Purpose | General Purpose |
| Tolerance | ±10% | ±20% |
| Temperature Coefficient | X7R | X7R |
| Size / Dimension | 0.177" L x 0.126" W (4.50mm x 3.20mm) | 0.177" L x 0.126" W (4.50mm x 3.20mm) |
| Voltage - Rated | 1000V (1kV) | 100V |
| Thickness (Max) | 0.061" (1.55mm) | 0.043" (1.10mm) |
| Capacitance | 4700pF | 0.1µF |
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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. Why do ceramic capacitors short?
Overvoltage: Exceeding the rated voltage may cause internal breakdown.
Mechanical damage: External impact or pressure.
Manufacturing defects: Problems with the internal structure. -
4. Why are mica capacitors so expensive?
Mica capacitors are expensive because of their excellent electrical properties (such as very low dissipation factor and stable temperature coefficient) and their high production costs.
