Main technical parameters
| Item | characteristic | |||||||||
| Operating temperature range | -25~ + 130℃ | |||||||||
| Nominal voltage range | 200-500V | |||||||||
| Capacitance tolerance | ±20% (25±2℃ 120Hz) | |||||||||
| Leakage current (uA) | 200-450WV|≤0.02CV+10(uA) C: nominal capacity (uF) V: rated voltage (V) 2 minutes reading | |||||||||
| Loss tangent value (25±2℃ 120Hz) | Rated voltage (V) | 200 | 250 | 350 | 400 | 450 | ||||
| tg δ | 0.15 | 0.15 | 0.1 | 0.2 | 0.2 | |||||
| For nominal capacity exceeding 1000uF, the loss tangent value increases by 0.02 for every 1000uF increase. | ||||||||||
| Temperature characteristics (120Hz) | Rated voltage (V) | 200 | 250 | 350 | 400 | 450 | 500 | |||
| Impedance ratio Z(-40℃)/Z(20℃) | 5 | 5 | 7 | 7 | 7 | 8 | ||||
| Durability | In a 130℃ oven, apply the rated voltage with rated ripple current for a specified time, then place at room temperature for 16 hours and test. The test temperature is 25±2℃. The performance of the capacitor should meet the following requirements | |||||||||
| Capacity change rate | 200~450WV | Within ±20% of the initial value | ||||||||
| Loss angle tangent value | 200~450WV | Below 200% of the specified value | ||||||||
| Leakage current | Below the specified value | |||||||||
| Load life | 200-450WV | |||||||||
| Dimensions | Load life | |||||||||
| DΦ≥8 | 130℃ 2000 hours | |||||||||
| 105℃ 10000 hours | ||||||||||
| High temperature storage | Store at 105℃ for 1000 hours, place at room temperature for 16 hours and test at 25±2℃. The performance of the capacitor should meet the following requirements | |||||||||
| Capacity change rate | Within ±20% of the initial value | |||||||||
| Loss tangent value | Below 200% of the specified value | |||||||||
| Leakage current | Below 200% of the specified value | |||||||||
Dimension (Unit:mm)
| L=9 | a=1.0 |
| L≤16 | a=1.5 |
| L＞16 | a=2.0 |
| D | 5 | 6.3 | 8 | 10 | 12.5 | 14.5 |
| d | 0.5 | 0.5 | 0.6 | 0.6 | 0.7 | 0.8 |
| F | 2 | 2.5 | 3.5 | 5 | 7 | 7.5 |
Ripple current compensation coefficient
①Frequency correction factor
| Frequency (Hz) | 50 | 120 | 1K | 10K~50K | 100K |
| Correction factor | 0.4 | 0.5 | 0.8 | 0.9 | 1 |
②Temperature correction coefficient
| Temperture(℃） | 50℃ | 70℃ | 85℃ | 105℃ |
| Correction Factor | 2.1 | 1.8 | 1.4 | 1 |
Standard Prodcuts List
| Series | Volt(V) | Capacitance（μF） | Dimension D×L(mm) | Impedance (Ωmax/10×25×2℃) | Ripple Current
(mA r.m.s/105×100KHz) |
| LED | 400 | 2.2 | 8×9 | 23 | 144 |
| LED | 400 | 3.3 | 8×11.5 | 27 | 126 |
| LED | 400 | 4.7 | 8×11.5 | 27 | 135 |
| LED | 400 | 6.8 | 8×16 | 10.50 | 270 |
| LED | 400 | 8.2 | 10×14 | 7.5 | 315 |
| LED | 400 | 10 | 10×12.5 | 13.5 | 180 |
| LED | 400 | 10 | 8×16 | 13.5 | 175 |
| LED | 400 | 12 | 10×20 | 6.2 | 490 |
| LED | 400 | 15 | 10×16 | 9.5 | 280 |
| LED | 400 | 15 | 8×20 | 9.5 | 270 |
| LED | 400 | 18 | 12.5×16 | 6.2 | 550 |
| LED | 400 | 22 | 10×20 | 8.15 | 340 |
| LED | 400 | 27 | 12.5×20 | 6.2 | 1000 |
| LED | 400 | 33 | 12.5×20 | 8.15 | 500 |
| LED | 400 | 33 | 10×25 | 6 | 600 |
| LED | 400 | 39 | 12.5×25 | 4 | 1060 |
| LED | 400 | 47 | 14.5×25 | 4.14 | 690 |
| LED | 400 | 68 | 14.5×25 | 3.45 | 1035 |
A liquid lead-type electrolytic capacitor is a type of capacitor widely used in electronic devices. Its structure primarily consists of an aluminum shell, electrodes, liquid electrolyte, leads, and sealing components. Compared to other types of electrolytic capacitors, liquid lead-type electrolytic capacitors have unique characteristics, such as high capacitance, excellent frequency characteristics, and low equivalent series resistance (ESR).
Basic Structure and Working Principle
The liquid lead-type electrolytic capacitor mainly comprises an anode, cathode, and dielectric. The anode is usually made of high-purity aluminum, which undergoes anodizing to form a thin layer of aluminum oxide film. This film acts as the dielectric of the capacitor. The cathode is typically made of aluminum foil and an electrolyte, with the electrolyte serving as both the cathode material and a medium for dielectric regeneration. The presence of the electrolyte allows the capacitor to maintain good performance even at high temperatures.
The lead-type design indicates that this capacitor connects to the circuit through leads. These leads are typically made of tinned copper wire, ensuring good electrical connectivity during soldering.
Key Advantages
1. **High Capacitance**: Liquid lead-type electrolytic capacitors offer high capacitance, making them highly effective in filtering, coupling, and energy storage applications. They can provide large capacitance in a small volume, which is particularly important in space-constrained electronic devices.
2. **Low Equivalent Series Resistance (ESR)**: The use of a liquid electrolyte results in low ESR, reducing power loss and heat generation, thereby improving the efficiency and stability of the capacitor. This feature makes them popular in high-frequency switching power supplies, audio equipment, and other applications requiring high-frequency performance.
3. **Excellent Frequency Characteristics**: These capacitors exhibit excellent performance at high frequencies, effectively suppressing high-frequency noise. Therefore, they are commonly used in circuits requiring high-frequency stability and low noise, such as power circuits and communication equipment.
4. **Long Lifespan**: By using high-quality electrolytes and advanced manufacturing processes, liquid lead-type electrolytic capacitors generally have a long service life. Under normal operating conditions, their lifespan can reach several thousand to tens of thousands of hours, meeting the demands of most applications.
Application Areas
Liquid lead-type electrolytic capacitors are widely used in various electronic devices, especially in power circuits, audio equipment, communication devices, and automotive electronics. They are typically used in filtering, coupling, decoupling, and energy storage circuits to enhance the performance and reliability of the equipment.
In summary, due to their high capacitance, low ESR, excellent frequency characteristics, and long lifespan, liquid lead-type electrolytic capacitors have become indispensable components in electronic devices. With advances in technology, the performance and application range of these capacitors will continue to expand.
