
( Brand: Mallory ), ( Manufacturer Part Number: 3DKB20-20 ), ( Model: 4-SECTION ), ( Part Type: Capacitor ), ( Country Of Origin: United States )
The Mallory 3dkb20-20 Sect. FP Electrolytic Capacitor is a versatile and high-performance electronic component designed for various applications in the electrical and electronics industry. This capacitor, specifically labeled as 20-20-20-20 F with a voltage rating of 450VDC, is an essential component for smoothing out voltage fluctuations in power supplies, filtering RF signals, and storing energy in circuits.
This electrolytic capacitor from Mallory features a capacitance value of 20,000 F (Microfarads), making it suitable for handling large electrical charges. Its four-terminal design, denoted by the "Sect. FP" label, ensures improved heat dissipation and stability compared to traditional two-terminal capacitors. The four terminals allow for parallel connection of multiple capacitors, increasing the total capacitance value while maintaining a relatively low equivalent series resistance (ESR).
The 3dkb20-20 Sect. FP capacitor is designed to operate within a temperature range of -55 C to 125 C, making it suitable for use in various environments. The electrolytic material used in its construction is a high-quality, long-lasting aluminum electrolyte that provides excellent capacitance stability and energy storage capabilities.
This capacitor's voltage rating of 450VDC indicates its ability to withstand a significant voltage difference across its terminals. This makes it suitable for use in high-voltage applications such as power supplies, radio frequency (RF) filters, and other circuits requiring large energy storage.
The Mallory 3dkb20-20 Sect. FP Electrolytic Capacitor is RoHS compliant, meaning it contains no restricted substances. It is also lead-free, making it an environmentally-friendly choice for electronic projects and industrial applications.
In summary, the Mallory 3dkb20-20 Sect. FP Electrolytic Capacitor is a high-performance, versatile component suitable for various applications in the electrical and electronics industry. Its 20,000 F capacitance value, four-terminal design, and 450VDC voltage rating make it an excellent choice for handling large electrical charges and high-voltage applications. Additionally, its RoHS compliance and lead-free construction make it an environmentally-friendly option.
a. **High-Quality Brand:** Mallory is a well-known and reputable brand in the electronics industry, particularly for capacitors. This capacitor has undergone rigorous testing and manufacturing processes to ensure reliability and consistency.
b. **Large Capacitance:** This capacitor offers a large capacitance value of 20,000 F (20-20-20-20 F), which can be useful in various applications requiring large energy storage or low ESR.
c. **High Voltage Rating:** The voltage rating of 450 VDC is suitable for many applications, especially in power electronics, where high voltage is often required.
d. **Long Shelf Life:** Electrolytic capacitors, in general, have a longer shelf life compared to other types of capacitors, making them a good choice for stocking or for projects with long development cycles.
2. **Cons:**a. **Size and Weight:** Due to the large capacitance value and high voltage rating, this capacitor will be larger and heavier than other capacitors with lower capacitance and voltage ratings. This can be a disadvantage in applications where size and weight are critical factors.
b. **Cost:** The large capacitance value and high voltage rating make this capacitor more expensive than smaller and lower voltage capacitors. This may be a concern for hobbyists or those working on budget projects.
c. **Leakage and Self-Discharge:** Electrolytic capacitors, in general, can suffer from leakage and self-discharge over time, which can reduce their capacity and performance. This can be a concern in applications where constant high capacitance is required.
3. **Conclusion:**The Mallory 3dkB20-20 Sect. FP Electrolytic Capacitor (20-20-20-20 F, 450 VDC) offers several advantages, including a high-quality brand, large capacitance, and high voltage rating. However, it also comes with some disadvantages, such as a larger size and weight, higher cost, and potential issues with leakage and self-discharge.
Based on the provided information, this capacitor may be a good choice for applications where large capacitance and high voltage are required, and reliability and consistency are important factors. However, for projects with limited budgets or size constraints, it may be worth considering alternative solutions with lower capacitance and voltage ratings.
**Recommendation:**If you require a large capacitance value (20,000 F) and a high voltage rating (450 VDC) for your project, the Mallory 3dkB20-20 Sect. FP Electrolytic Capacitor is a solid choice. However, if size, weight, or cost are critical factors, consider evaluating alternative solutions with lower capacitance and voltage ratings that better fit your project requirements.
Likely made by Mallory. Two twist-Loki tabs are broken off and two remain in place-visible the photos. The part numbers are as follows: 3DKB20-20 317508170, 11D492G3-65. Suitable for re-forming.
The wiring lugs are clean and free of old solder or. Offered is the vintage twist-Loki FP Capacitor rated as follows: 20-20-20-20uF 450VDC. Offered for parts or restoration and as is due to age. DMM measured values are as follows: 42.2uF, 39.6uF, 41.1uF and 40.1uF.
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