T540D227K006CH8505 vs T491A155M016AT
| Part Number |
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| Category | Tantalum - Polymer Capacitors | Tantalum Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP TANT POLY 220UF 6.3V 2917 | CAP TANT 1.5UF 20% 16V 1206 |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | KO-CAP® T540 | T491 |
| Type | Molded | Molded |
| Features | High Reliability | General Purpose |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 2917 (7343 Metric) | 1206 (3216 Metric) |
| Tolerance | ±10% | ±20% |
| Size / Dimension | 0.287" L x 0.169" W (7.30mm x 4.30mm) | 0.126" L x 0.063" W (3.20mm x 1.60mm) |
| Voltage - Rated | 6.3 V | 16 V |
| Lead Spacing | - | - |
| Ratings | COTS | - |
| Height - Seated (Max) | 0.122\" (3.10mm) | 0.071\" (1.80mm) |
| Capacitance | 220 µF | 1.5 µF |
| ESR (Equivalent Series Resistance) | 40mOhm @ 100kHz | 8Ohm |
| Lifetime @ Temp. | 2000 Hrs @ 125°C | 2000 Hrs @ 125°C |
| Manufacturer Size Code | D | A |
| Failure Rate | - | - |
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1. What are tantalum polymer capacitors?
Tantalum polymer capacitors are electrolytic capacitors that use metallic tantalum as the anode material and a conductive polymer (such as polypyrrole or polythiophene) as the cathode material. This design provides better performance than traditional aluminum electrolytic capacitors and solid tantalum capacitors, especially in high-frequency applications.
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2. What is special about tantalum polymer capacitors?
Low ESR (equivalent series resistance): They are suitable for use in circuits that require fast response.
Long life: There is no liquid electrolyte, so it will not dry out and has a longer service life.
High reliability: They perform well in long-term operation.
Self-healing ability: When a local short circuit occurs, the polymer can reform the insulating layer to prevent further damage.
Volumetric efficiency: They have a high capacitance density and can provide large capacitance values in a smaller package. -
3. How do you know that a capacitor is tantalum polymer?
Appearance markings: Usually the word "Polymer" is marked, along with the capacitance value, operating voltage, and positive and negative pole identification.
Packaging information: Check the
Technical specifications or data sheet on the product packaging. -
4. What special precautions must be taken when installing tantalum polymer capacitors?
Ensure correct polarity connection: Incorrect polarity will cause immediate damage.
Pay attention to the operating temperature range: Avoid exceeding the recommended operating temperature range.
Protection during welding: Avoid overheating to protect components from damage.
ESD protection: Take appropriate anti-static measures during handling.
