T540D227K006CH8505 vs T540B686M004DH8710
| Part Number |
|
|
| Category | Tantalum - Polymer Capacitors | Tantalum - Polymer Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP TANT POLY 220UF 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 | 220 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 |
-
1. Will tantalum polymer capacitors deteriorate?
All types of capacitors will experience a certain degree of aging over time. For tantalum polymer capacitors, although the aging rate is relatively slow, they may still experience problems such as capacity loss after long-term use. In addition, improper storage conditions or excessive operating temperatures can also accelerate this process.
-
2. What are the alternatives to tantalum polymer capacitors?
Aluminum electrolytic capacitors: For applications that do not require extremely high stability and low ESR.
Solid aluminum capacitors: Provide performance between traditional aluminum electrolytic capacitors and tantalum polymer capacitors.
Other solid capacitors: Choose the right alternative based on your specific needs. -
3. Which side of a tantalum polymer capacitor is the positive pole?
Usually, there is a clear mark on the tantalum polymer capacitor to indicate the positive pole, such as a long bar mark or a "+" symbol.
-
4. What causes tantalum polymer capacitors to fail?
Overvoltage operation: Exceeding the rated voltage may cause internal breakdown.
Reverse bias: Connecting the positive and negative terminals in reverse may cause immediate damage.
Overheating: Prolonged exposure to high temperature environments can affect performance and even cause failure.
Mechanical damage: Damage may also be caused by external impact or pressure.
