T491A105M020AT vs T540D157K006CH8505
| Part Number |
|
|
| Category | Tantalum Capacitors | Tantalum - Polymer Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP TANT 1UF 20% 20V 1206 | CAP TANT POLY 150UF 6.3V 2917 |
| Package | -Reel® | Tape & Reel (TR) |
| Series | T491 | KO-CAP® T540 |
| Type | Molded | Molded |
| Features | General Purpose | High Reliability |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 1206 (3216 Metric) | 2917 (7343 Metric) |
| Tolerance | ±20% | ±10% |
| Size / Dimension | 0.126" L x 0.063" W (3.20mm x 1.60mm) | 0.287" L x 0.169" W (7.30mm x 4.30mm) |
| Voltage - Rated | 20 V | 6.3 V |
| Lead Spacing | - | - |
| Ratings | - | COTS |
| Height - Seated (Max) | 0.071\" (1.80mm) | 0.122\" (3.10mm) |
| Capacitance | 1 µF | 150 µF |
| ESR (Equivalent Series Resistance) | 9Ohm | 40mOhm @ 100kHz |
| Lifetime @ Temp. | 2000 Hrs @ 125°C | 2000 Hrs @ 125°C |
| Failure Rate | - | - |
| Manufacturer Size Code | A | D |
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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. 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. -
3. What special precautions must be taken when installing tantalum capacitors?
Ensure the correct polarity connection.
Be careful not to exceed the rated voltage.
Use appropriate fuses or other protective devices to prevent overcurrent.
Consider heat dissipation design to avoid local overheating. -
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.
