C0805C393M5JACAUTO vs 12061A242JAT2A
| Part Number |
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| Category | Ceramic Capacitors | Ceramic Capacitors |
| Manufacturer | KEMET | KYOCERA AVX |
| Description | CAP CER 0.039UF 50V U2J 0805 | CAP CER 2400PF 100V NP0 1206 |
| Package | Tape & Reel (TR) | 1206 (3216 Metric) |
| Series | SMD Auto U2J | - |
| Features | Low ESL, Low Dissipation Factor | - |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount, MLCC | Surface Mount, MLCC |
| Package / Case | 0805 (2012 Metric) | 1206 (3216 Metric) |
| Applications | Automotive | General Purpose |
| Tolerance | ±20% | ±5% |
| Temperature Coefficient | U2J | C0G, NP0 |
| Size / Dimension | 0.079" L x 0.049" W (2.00mm x 1.25mm) | 0.126" L x 0.063" W (3.20mm x 1.60mm) |
| Voltage - Rated | 50V | 100V |
| Lead Spacing | - | - |
| Thickness (Max) | 0.055\" (1.40mm) | 0.060" (1.52mm) |
| Ratings | AEC-Q200 | - |
| Height - Seated (Max) | - | - |
| Capacitance | 0.039 µF | 2400pF |
| Lead Style | - | - |
| Failure Rate | - | - |
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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. Can ceramic capacitors hold a charge?
Ceramic capacitors can store charge, but they have a higher leakage current than electrolytic capacitors, so they are less able to hold a charge.
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3. 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.
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4. Which side of a ceramic capacitor is the positive side?
Ceramic capacitors are non-polarized, so there is no positive or negative side.

