T491A155K010AT vs T540D337K006CH8510
| Part Number |
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| Category | Tantalum Capacitors | Tantalum - Polymer Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP TANT 1.5UF 10% 10V 1206 | CAP TANT POLY 330UF 6.3V 2917 |
| Package | Tape & Reel (TR) | 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 | ±10% | ±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 | 10 V | 6.3 V |
| Lead Spacing | - | - |
| Ratings | - | COTS |
| Height - Seated (Max) | 0.071\" (1.80mm) | 0.122\" (3.10mm) |
| Capacitance | 1.5 µF | 330 µF |
| ESR (Equivalent Series Resistance) | 8Ohm | 40mOhm @ 100kHz |
| Lifetime @ Temp. | 2000 Hrs @ 125°C | 2000 Hrs @ 125°C |
| Failure Rate | - | - |
| Manufacturer Size Code | A | D |
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1. 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. -
2. When to use tantalum capacitors?
When miniaturization, low ESR (equivalent series resistance), and stable operation over a wide temperature range are required.
Suitable for audio processing, communication equipment, computer motherboards and other fields. -
3. 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.
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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.
