C1812C104M1RACTU vs C1808C152KGRACTU
| Part Number |
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| Category | Ceramic Capacitors | Ceramic Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP CER 0.1UF 100V X7R 1812 | CAP CER 1500PF 2KV X7R 1808 |
| Package | 1812 (4532 Metric) | 1808 (4520 Metric) |
| Series | C | C |
| 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 | ±20% | ±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 | 100V | 2000V (2kV) |
| Thickness (Max) | 0.043" (1.10mm) | 0.085" (2.15mm) |
| Capacitance | 0.1µF | 1500pF |
| Features | - | High Voltage |
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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. Why are ceramic capacitors better?
Small size: suitable for high-density circuit board design.
Good temperature resistance: can work over a wide temperature range.
High reliability: no electrolyte, so it is not easy to age.
Good frequency response: suitable for high-frequency applications.
Low ESR: low equivalent series resistance, which helps to improve efficiency. -
3. 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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4. 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.
