Introduction

Our review examines the performance of the T495D476K025ATE250, a Tantalum Molded Capacitor from KEMET. The focus is a comprehensive comparison of component data and statistical benchmarks, which is crucial for electronics engineers while assessing this Capacitor for usage. An analysis of Capacitance, Series Resistance, Dissipation Factor, and Quality Factor is conducted in this review, establishing the pros and cons of the T495D476K025ATE250 capacitor against the benchmark data.

Pros:

• Competitive Series Resistance
• Superior Dissipation Factor at lower frequencies
• Significant Quality Factor improvement at higher frequencies
• Impressive performance in low-frequency applications
• Dependable component from a reputed manufacturer, KEMET

• Capacitance deviates slightly from the nominal value (<47μ)
• Quality factor instability and unpredictable performance in certain frequency regions
• Less effective in high-frequency applications

The T495D476K025ATE250 Capacitor aims to excel in the world of electronics, attracting engineers to leverage its Tantalum: Molded composition and provided data for a practical evaluation. Read on to learn how well this Capacitor compares to the statistical benchmark data based on the component LCR measurements at both 1 Volt and 10 Volts.

Impedance

In the realm of tantalum molded capacitors, a comprehensive analysis of the impedance performance can be gleaned from data collected at test voltages of 1 Volt and 10 Volts. A detailed inspection of the impedance values can facilitate a more profound understanding of the capacitor's applicability in various circuits and electronic designs.

At a 1 Volt test measurement, the capacitor exhibits an impedance of 704.6 Ohms at the lowest frequency of 5 Hz. This value contrasts with the statistical benchmark, which presents a minimum impedance of 539.4 Ohms and an average impedance of 656.9 Ohms. Furthermore, the capacitor's impedance of 357.3 Ohms at 10 Hz is slightly above the benchmark average of 332.8 Ohms, indicating a moderate performance within the lower frequency range.

As the test frequency increases, the capacitor consistently presents higher impedance values compared to the average statistical benchmark. The difference in impedance values becomes more apparent beyond 50 Hz. For instance, the capacitor exhibits an impedance of 72.93 Ohms at 50 Hz, contrasting with the benchmark average of 69.54 Ohms. This divergence continues throughout the entire tested frequency range. A notable deviation occurs at 5 kHz, where the impedance reaches 759 mOhms for the component, while the benchmark average is a mere 1.003 Ohms.

Impedance values recorded at 10 Volt measurements demonstrate a similar trend to those observed at 1 Volt. For example, the capacitor’s impedance of 285 Ohms at 5 Hz compares more favorably to the statistical benchmark's minimum impedance of 539.4 Ohms and average impedance of 656.9 Ohms. This observation suggests that this specific tantalum capacitor may provide superior performance in applications with higher voltage requirements.

In conclusion, a meticulous examination of impedance values at various voltage and frequency levels allows for a thorough understanding of the capacitor's performance, ensuring an optimal selection of components for different electronic designs and specific application requirements.

Capacitance

At 1 Volt, the T495D476K025ATE250 exhibits outstanding performance within the test frequencies of 5Hz to 700kHz, notably surpassing the average series capacitance in the benchmark data. Results show that the component even exceeds the maximum series capacitance at certain frequency intervals, such as 75kHz to 200kHz. Nonetheless, it is essential to be cognizant of the fact that its performance significantly declines in higher frequency ranges above 750kHz, falling short of the minimum series capacitance observed in the statistical benchmark.

Subjecting the T495D476K025ATE250 to a higher voltage of 10 Volts causes capacitance performance fluctuations across the entire test frequency range. The capacitor demonstrates exceptional performance at low frequencies up to 50Hz, exceeding the statistical benchmark's maximum series capacitance values. However, its behavior in the range of 100Hz to 1MHz varies considerably, at times trailing behind the benchmark’s minimum series capacitance values, as observed in the 900kHz to 1MHz frequency interval.

When compared to other Tantalum: Molded capacitors with similar values, the T495D476K025ATE250 presents an impressive capacitance response, particularly in the low-frequency domain. That being said, it is crucial for engineers to be mindful of its performance inconsistencies above the 750kHz range at 1 Volt and its fluctuating behavior across the 10 Volts test frequencies. These variations could potentially affect the capacitor's compatibility and efficacy in specific electronic circuit designs, necessitating careful evaluation during the component selection process.

Series Resistance

Dissipation Factor and Quality Factor

We will thoroughly analyze the performance of the KEMET T495D476K025ATE250 Capacitor by examining its Dissipation Factor (Df) and Quality Factor (Q) values in relation to industry benchmarks.

LCR measurements were carefully collected at a range of test frequencies from 5 Hz to 1 MHz under two distinct conditions: 1 Volt and 10 Volts. We will deliver a comprehensive analysis based on the data obtained.

At 1 Volt, the Df demonstrates a decreasing trend initially between 5 Hz and 100 Hz. However, from 100 Hz onwards, the trend takes a drastic turn as the Df values start to increase, pointing towards higher energy loss. In contrast, at 10 Volt, the Df values are significantly larger in comparison, especially in lower frequency ranges such as 5 Hz, which often lead to less efficient operation.

When examining the Quality Factor, at 1 Volt, the Q values are predominantly higher when compared to 10 Volts, which signifies better energy storage efficiency. The capacitor starts out with a Q value of 32.95 at 5 Hz under a 1 Volt condition, reaching its peak at 63.74 for 100 Hz before encountering a steady decline to approximately 0.07 at 1 MHz. By comparison, the Q values under the 10 Volts condition reached a lower peak value of only 23.48 at 100 Hz.

Assessing the performance of the KEMET T495D476K025ATE250 Capacitor against the available statistical benchmark data, one can conclude that it does not meet the industry expectations of displaying exceptionally low Df values and high Q factors, which are typically anticipated from tantalum capacitors. The increasing trend of Df values observed from 100 Hz onwards, combined with the generally lower Q values at 10 Volts, suggests that this particular capacitor might not be well-suited for applications that demand higher efficiencies and stabilities within these frequency ranges, such as high-frequency power supplies and signal processing circuits.

Comparative Analysis

Conclusion

Throughout this technical review, we have extensively analyzed the performance of the KEMET Tantalum Capacitor (part number T495D476K025ATE250) in comparison with the benchmark data provided. After assessing various metrics such as impedance, dissipation factor, quality factor, series resistance, series inductance, and series capacitance, we find that this capacitor exhibits a mixed performance when benchmarked against capacitors of the same value.

Under the 1 Volt test, the KEMET capacitor demonstrates a relatively average to above-average impedance and series resistance in the lower frequency range (up to 100kHz) compared to the benchmark data. However, it falters in its performance in the high frequency range (100kHz and above), where the impedance, series resistance, and dissipation factor values deviate from the benchmark, indicating a reduced efficiency in this range.

Moving on to the 10 Volts test, results show higher dissipation factors which might affect the performance even in the lower frequency range when compared to the benchmark. Although the capacitor's series capacitance fares quite reasonably against the benchmark data, it is crucial to note the inconsistencies in the high frequency range.

In conclusion, taking into account both the pros and cons, the KEMET Tantalum Capacitor T495D476K025ATE250 may be suitable for some circuit applications where average to above-average efficiency in the lower frequency range is the main requirement. However, it may not be the best choice for cases where a stable performance across a wide frequency range is essential, and higher power supplies increase the dissipation factor acting detrimentally to the capacitor's efficiency. It is recommended for engineers to critically evaluate the device's performance against their specific design needs before deciding on its suitability for implementation in their respective circuits.