T491C475K025AT7280 vs T491A225M035AT
| Part Number |
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| Category | Tantalum Capacitors | Tantalum Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP TANT 4.7UF 10% 25V 2312 | CAP TANT 2.2UF 20% 35V 1206 |
| Package | Cut Tape (CT) | Tape & Reel (TR) |
| Series | T491 | 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 | 2312 (6032 Metric) | 1206 (3216 Metric) |
| Tolerance | ±10% | ±20% |
| Size / Dimension | 0.236" L x 0.126" W (6.00mm x 3.20mm) | 0.126" L x 0.063" W (3.20mm x 1.60mm) |
| Voltage - Rated | 25 V | 35 V |
| Lead Spacing | - | - |
| Ratings | - | - |
| Height - Seated (Max) | 0.110\" (2.80mm) | 0.071\" (1.80mm) |
| Capacitance | 4.7 µF | 2.2 µF |
| ESR (Equivalent Series Resistance) | 2.4Ohm | 4.5Ohm |
| Lifetime @ Temp. | 2000 Hrs @ 125°C | 2000 Hrs @ 125°C |
| Failure Rate | - | - |
| Manufacturer Size Code | C | A |
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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. What is the expected life of tantalum capacitors?
Under normal circumstances, it can range from thousands of hours to tens of thousands of hours, depending on the working conditions and manufacturer specifications.
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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. What causes tantalum capacitors to burn out?
Common causes include applying a voltage exceeding the maximum allowable value, excessive current, high ambient temperature, and manufacturing defects.
