TAJA225K020RNJ vs T491A105K016AT
| Part Number |
|
|
| Category | Tantalum Capacitors | Tantalum Capacitors |
| Manufacturer | KYOCERA AVX | KEMET |
| Description | CAP TANT 2.2UF 10% 20V 1206 | CAP TANT 1UF 10% 16V 1206 |
| Package | Tape & Reel (TR) | Cut Tape (CT) |
| Series | TAJ | T491 |
| 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) | 1206 (3216 Metric) |
| Tolerance | ±10% | ±10% |
| Size / Dimension | 0.126" L x 0.063" W (3.20mm x 1.60mm) | 0.126" L x 0.063" W (3.20mm x 1.60mm) |
| Voltage - Rated | 20 V | 16 V |
| Lead Spacing | - | - |
| Ratings | - | - |
| Height - Seated (Max) | 0.071\" (1.80mm) | 0.071\" (1.80mm) |
| Capacitance | 2.2 µF | 1 µF |
| ESR (Equivalent Series Resistance) | 5.3Ohm | 10Ohm |
| Lifetime @ Temp. | - | 2000 Hrs @ 125°C |
| Failure Rate | - | - |
| Manufacturer Size Code | A | A |
-
1. Disadvantages of tantalum capacitors
The price is relatively high.
If used improperly or the circuit design is defective, it may fail, including explosion.
It is polarity sensitive and can only work in the specified direction.
It may fail easily under certain conditions (such as overvoltage, surge current). -
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. Why do tantalum capacitors explode?
The main reason is that excessive voltage or current shocks cause internal short circuits, which trigger thermal runaway.
Excessive ambient temperature may also exacerbate this situation. -
4. Can I use ceramic capacitors instead of tantalum capacitors?
It depends on the specific situation. If the size, ESR requirements are not high and a specific capacitance value is not required, you can consider replacing it.
But be aware that there are differences in physical properties between the two, and direct replacement may affect the working state of the circuit.
