T491A225K010AT vs F920J225MPA
| Part Number |
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| Category | Tantalum Capacitors | Tantalum Capacitors |
| Manufacturer | KEMET | KYOCERA AVX |
| Description | CAP TANT 2.2UF 10% 10V 1206 | CAP TANT 2.2UF 20% 6.3V 0805 |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | T491 | F92 |
| Type | Molded | Molded |
| Features | General Purpose | General Purpose |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 1206 (3216 Metric) | 0805 (2012 Metric) |
| Tolerance | ±10% | ±20% |
| Size / Dimension | 0.126" L x 0.063" W (3.20mm x 1.60mm) | 0.079" L x 0.049" W (2.00mm x 1.25mm) |
| Voltage - Rated | 10 V | 6.3 V |
| Lead Spacing | - | - |
| Ratings | - | - |
| Height - Seated (Max) | 0.071\" (1.80mm) | 0.039\" (1.00mm) |
| Capacitance | 2.2 µF | 2.2 µF |
| ESR (Equivalent Series Resistance) | 8Ohm | 12Ohm |
| Lifetime @ Temp. | 2000 Hrs @ 125°C | - |
| Failure Rate | - | - |
| Manufacturer Size Code | A | P |
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1. Difference between ordinary capacitors and tantalum capacitors
Material: Ordinary capacitors can be aluminum electrolytic capacitors, ceramic capacitors, etc.; while tantalum capacitors use metal tantalum as anode material.
Performance: Generally, tantalum capacitors have better temperature stability and higher capacity-to-volume ratio.
Application range: Due to its performance characteristics, tantalum capacitors are often used in miniaturized electronic products that require high reliability. -
2. Why are tantalum capacitors so expensive?
Tantalum ore resources are scarce and the mining cost is high.
The manufacturing process is complex and the yield is relatively low.
It has excellent electrical characteristics, making it indispensable in high-end applications. -
3. Will tantalum capacitors deteriorate?
Yes, tantalum capacitors may gradually lose some of their performance when stored for a long time or in adverse environments.
For example, long-term exposure to high temperature and humidity may cause the electrolyte to evaporate or chemically change. -
4. Is tantalum better than tungsten?
It depends on the application. For capacitors, tantalum is preferred due to its unique properties; while in some other industrial uses, such as making filaments, tungsten is preferred.
