T540D157K006CH8505 vs T540B686M004DH8710
| Part Number |
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| Category | Tantalum - Polymer Capacitors | Tantalum - Polymer Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP TANT POLY 150UF 6.3V 2917 | CAP TANT POLY 68UF 4V 1411 |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | KO-CAP® T540 | KO-CAP® T540 |
| Type | Molded | Molded |
| Features | High Reliability | High Reliability |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 2917 (7343 Metric) | 1411 (3528 Metric) |
| Tolerance | ±10% | ±20% |
| Size / Dimension | 0.287" L x 0.169" W (7.30mm x 4.30mm) | 0.138" L x 0.110" W (3.50mm x 2.80mm) |
| Voltage - Rated | 6.3 V | 4 V |
| Lead Spacing | - | - |
| Ratings | COTS | COTS |
| Height - Seated (Max) | 0.122\" (3.10mm) | 0.083\" (2.10mm) |
| Capacitance | 150 µF | 68 µF |
| ESR (Equivalent Series Resistance) | 40mOhm @ 100kHz | 80mOhm @ 100kHz |
| Lifetime @ Temp. | 2000 Hrs @ 125°C | 2000 Hrs @ 125°C |
| Manufacturer Size Code | D | B |
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1. What are the disadvantages of tantalum polymer capacitors?
Higher cost: They are more expensive to produce than traditional aluminum electrolytic capacitors.
Lower withstand voltage: They are usually rated for lower working voltage than aluminum electrolytic capacitors of the same size.
Temperature sensitivity: They may not perform well in extreme temperatures, especially low temperatures.
Risk of physical damage: They may be damaged if subjected to mechanical stress or excessive current surges. -
2. What is the difference between regular capacitors and tantalum polymer capacitors?
Construction: Regular capacitors can be non-polar (such as ceramic capacitors) or polar (such as aluminum electrolytic capacitors). Tantalum polymer capacitors are always polar and use a solid conductive polymer as the electrolyte.
Performance: Tantalum polymer capacitors generally have lower ESR, better frequency characteristics, and higher stability.
Applications: Due to their high performance characteristics, tantalum polymer capacitors are often used in electronic devices with high performance requirements. -
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.
