C1812C472KDRACTU vs C1808C102KHRACTU
| Part Number |
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| Category | Ceramic Capacitors | Ceramic Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP CER 4700PF 1KV X7R 1812 | CAP CER 1000PF 3KV X7R 1808 |
| Package | 1812 (4532 Metric) | 1808 (4520 Metric) |
| Series | C | C |
| Features | High Voltage | 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) | 1808 (4520 Metric) |
| Applications | General Purpose | General Purpose |
| Tolerance | ±10% | ±10% |
| Temperature Coefficient | X7R | X7R |
| Size / Dimension | 0.177" L x 0.126" W (4.50mm x 3.20mm) | 0.185" L x 0.079" W (4.70mm x 2.00mm) |
| Voltage - Rated | 1000V (1kV) | 3000V (3kV) |
| Thickness (Max) | 0.061" (1.55mm) | 0.085" (2.15mm) |
| Capacitance | 4700pF | 1000pF |
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1. What is the difference between ceramic capacitors and electrolytic capacitors?
Polarity: Ceramic capacitors are non-polar, while electrolytic capacitors are polar.
Capacity range: Electrolytic capacitors generally offer larger capacitance values.
Stability: Ceramic capacitors are more stable, especially when the temperature changes.
Lifespan: Ceramic capacitors have a longer lifespan because there is no liquid electrolyte to dry out. -
2. Why do ceramic capacitors make noise?
Some types of ceramic capacitors (particularly Class 2 ceramic capacitors) produce micro-vibrations when the voltage changes due to their material properties, which in turn cause faint mechanical noise.
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3. Do ceramic capacitors degrade over time?
The capacitance value of ceramic capacitors may decrease slightly over time and environmental factors, but this is usually a slow process.
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4. Can ceramic capacitors be used for audio?
Ceramic capacitors can be used in audio circuits, but care needs to be taken to select the right type to avoid introducing unnecessary noise or distortion.
