T521D475M063ATE075 vs T520D477M2R5ATE006
| Part Number |
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| Category | Tantalum - Polymer Capacitors | Tantalum - Polymer Capacitors |
| Manufacturer | KEMET | KEMET |
| Description | CAP TANT POLY 4.7UF 63V 2917 | CAP TANT POLY 470UF 2.5V 2917 |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | KO-CAP® T521 | KO-CAP® T520 |
| Type | Molded | Molded |
| Features | General Purpose | General Purpose |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 105°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 2917 (7343 Metric) | 2917 (7343 Metric) |
| Tolerance | ±20% | ±20% |
| Size / Dimension | 0.287" L x 0.169" W (7.30mm x 4.30mm) | 0.287" L x 0.169" W (7.30mm x 4.30mm) |
| Voltage - Rated | 63 V | 2.5 V |
| Lead Spacing | - | - |
| Ratings | - | - |
| Height - Seated (Max) | 0.122\" (3.10mm) | 0.122\" (3.10mm) |
| Capacitance | 4.7 µF | 470 µF |
| ESR (Equivalent Series Resistance) | 75mOhm @ 100kHz | 6mOhm @ 100kHz |
| Lifetime @ Temp. | 2000 Hrs @ 125°C | 2000 Hrs @ 105°C |
| Manufacturer Size Code | D | D |
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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. 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.
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4. What is the difference between aluminum and tantalum capacitors?
Material: Aluminum capacitors use aluminum foil as the electrode material; tantalum capacitors use tantalum metal.
Performance: Tantalum capacitors generally have better high temperature performance, higher capacitance density per unit volume, and lower ESR.
Price: In general, tantalum capacitors cost more than aluminum capacitors.
