Introduction

The KYOCERA AVX TAJD476M025RNJ is a surface-mount Tantalum Molded Capacitor, designed to offer stable capacitance under various operating conditions. With a nominal value of 47μF, a tolerance of ±20%, and a voltage rating of 25V, this capacitor is well suited for applications requiring compact size and reliability. The purpose of this technical review is to analyse the performance of the TAJD476M025RNJ by comparing its LCR measurements against a statistical benchmark formed from other components of the same value.

Pros:

• Stable capacitance across a wide range of test frequencies
• Low impedance values at higher test frequencies
• Generally low dissipation factor values up to 400 kHz

• Higher dissipation factors at some test frequencies (>400 kHz)
• Noticeable deviations in series capacitance beyond 200 kHz

Impedance

The impedance response of the KYOCERA AVX TAJD476M025RNJ capacitor was measured at 1 V and 10 V bias levels in order to compare its performance against the industry statistical benchmark. To conduct a thorough analysis of the capacitor's impedance performance, data from both voltage levels were compared to the benchmark minimum, average, and maximum values across a variety of test frequencies.

At a 1 V bias level, the capacitor demonstrated higher impedance levels than the industry benchmark average values at test frequencies of 5 Hz, 10 Hz, and 50 Hz, with measured impedance readings of 698.4, 352.8, and 71.47 Ohms, respectively. In comparison, the benchmark average values for the same frequencies were 656.9, 332.8, and 69.54 Ohms. However, the capacitor's impedance performance at higher frequencies of 100 Hz, 500 Hz, and 1 kHz displayed closer alignment to the benchmark average values, with readings of 35.86, 7.218, and 3.623 Ohms compared to the benchmark average values of 35.87, 7.777, and 4.046 Ohms, respectively. It is worth mentioning that the capacitor's impedance values rose above both the benchmark minimum and maximum levels in the frequency range of 5 kHz to 50 kHz, which indicates suboptimal performance within this specific frequency range.

When assessed at a 10 V bias level, the capacitor's impedance readings at lower frequencies (5 Hz to 50 Hz: 445.3, 274.5, and 69.74 Ohms) continued to register above the benchmark average values. Moreover, the impedance readings at 100 Hz, 500 Hz, and 1 kHz (35.6, 7.212, and 3.619 Ohms) maintained closer alignment with the benchmark average values. However, the capacitor's impedance performance was observed to worsen between 5 kHz and 50 kHz when compared to the 1 V results, with recorded impedance values significantly exceeding the benchmark maximum values in this range.

In conclusion, the KYOCERA AVX TAJD476M025RNJ capacitor exhibited reasonable impedance performance at specific lower frequencies, while its performance within the frequency range of 5 kHz to 50 kHz was observed to be suboptimal, particularly at a 10 V bias level. This detailed impedance performance analysis will be highly beneficial for engineers when evaluating this particular capacitor for a range of specific applications, especially when operating in frequency ranges where the capacitor shows suboptimal performance.

Capacitance

The TAJD476M025RNJ series presents capacitance measurements at 1 volt that indicate its performance is within the average range for most test frequencies in comparison to the benchmark data. It is important to highlight that at low test frequencies, which span from 5 Hz to 10 kHz, the capacitor's capacitance falls between the minimum and average capacitance values found in the benchmark data. For example, at a 5 Hz test frequency, the measured capacitance value of 45.54μ is close to the benchmark average of 49.2μ and clearly within the range of the minimum (40.66μ) and the maximum (69.99μ) benchmark capacitance values.

At higher test frequencies, ranging from 20 kHz to 1 MHz, the results are generally below the benchmark average. For instance, at 50 kHz, the measured capacitance value of 26.77μ falls below the average benchmark capacitance of 31.64μ; however, it still stays within the minimum (12.85μ) and maximum (49.5μ) capacitance values from the benchmark. Similarly, at a 1 MHz test frequency, the TAJD476M025RNJ capacitance of 1.563μ is notably lower when compared to the benchmark average capacitance value of 345.5μ.

The performance analysis of the capacitor at 10 volts reveals a similar pattern: At lower test frequencies, the capacitance values remain within the benchmark range. Nevertheless, at higher test frequencies, the values generally fall below the average, such as at 100 kHz where a measured capacitance of 20.5μ is below the average benchmark capacitance value.

In summary, the TAJD476M025RNJ capacitor exhibits satisfactory performance within the average range at lower test frequencies. However, the component's capacitance values tend to fall below average when subjected to higher test frequencies. These insights may prove helpful for engineers when evaluating this capacitor for use in a variety of electronic circuits and applications, giving them a better understanding of its performance characteristics under different scenarios.

Series Resistance

The TAJD476M025RNJ capacitor's series resistance is an important parameter to consider, as it directly impacts the component's overall efficiency and thermal stability. In our analysis, the series resistance is assessed at various test frequencies and voltages to provide a comprehensive insight into its performance.

At low test frequencies of 5Hz and 10Hz and a voltage of 1V, the TAJD476M025RNJ capacitor exhibits series resistances of 18.81Ω and 7.114Ω, respectively. Comparing these values to the average benchmark series resistance data of 44.75Ω at 5Hz and 18.59Ω at 10Hz, it is evident that the TAJD476M025RNJ capacitor provides superior performance with lower series resistance.

As the test frequency increases, the capacitor's series resistance declines significantly. At a frequency of 1MHz, its series resistance is 89.17mΩ, which is considerably lower than the benchmark average resistance of 280.2mΩ at the same frequency. This implies that the TAJD476M025RNJ's series resistance becomes increasingly desirable as the operating frequency rises.

Furthermore, the series resistance performance of the TAJD476M025RNJ capacitor remains consistent when tested at higher voltages such as 10V. At a frequency of 500kHz, the series resistance reaches a minimum value of 83.31mΩ, which is still lower than the corresponding benchmark data. This observation highlights the capacitor's reliable performance across different voltage ranges.

In conclusion, the TAJD476M025RNJ capacitor demonstrates commendable series resistance performance, outperforming the statistical benchmarks for capacitors of the same value. Such a component would be beneficial in electronic circuits where consistent and reliable series resistance values are crucial for optimizing overall performance and energy efficiency.

Dissipation Factor and Quality Factor

The KYOCERA AVX Capacitor, with the part number TAJD476M025RNJ, exhibits specific characteristics in terms of Dissipation Factor (Df) and Quality Factor (Q). These factors need to be closely examined as they affect the capacitor's efficiency, energy loss rate, and overall performance. Understanding these factors is crucial when selecting a capacitor, such as this Tantalum Molded component, and comparing it to other alternatives by evaluating its low Df and high Q performance based on test frequencies at 1 Volt and 10 Volts.

At a 1 Volt LCR test frequency, the TAJD476M025RNJ capacitor demonstrates relatively low Df values, which range from 0.013 at 50 Hz to 0.515 at 10 kHz. This low Df indicates a desirable low rate of energy loss, meaning that the capacitor is functioning efficiently. The Q factor values for these test frequencies vary between 38.29 at 5 Hz to a minimum of 0.61 at 100 kHz, illustrating the differences between reactance and resistance and thus providing insights into the component's performance based on frequency variation.

As the LCR measurement voltage increases to 10 Volts, the Df values range between 1.054 at 5 Hz to 1.460 at 100 kHz. These fluctuations highlight the component's energy loss rate under different voltage conditions. Q factor values under these conditions range from 0.95 at 5 Hz to a minimum of 0.27 at 1 MHz, with a peak of 1.97 at 10 kHz. It is important to note that for frequencies above 750 kHz, certain Q values could not be measured, which could affect an engineer's selection process based on specific application requirements.

When comparing the TAJD476M025RNJ from KYOCERA AVX to statistical benchmark data, this capacitor exhibits optimal performance at lower test frequencies, typically below 100 kHz. In these lower frequency ranges, the Df values remain relatively low, while the Q values improve, reflecting a more efficient performance. This valuable information can be used to decide whether the TAJD476M025RNJ capacitor is the most suitable choice for the frequency requirements of a particular application or if alternative components should be considered for better performance in different frequency ranges.

Comparative Analysis

Conclusion

The KYOCERA AVX TAJD476M025RNJ tantalum molded capacitor was put under scrutiny in comparison to the statistical benchmark made from similar components. The capacitor demonstrated varied performances across different test frequencies and voltages. Taking into account the assessment of the impedance, capacitance, series resistance, dissipation factor, and quality factor parameters against the benchmark, different aspects of the TAJD476M025RNJ capacitor's results can be highlighted.

At test frequencies below 100 kHz and at both 1V and 10V, the TAJD476M025RNJ capacitor exhibits relatively high capacitive values with its nominal capacitance of 47μ. In the lower frequency range, up to 100 kHz, the capacitor generally performs acceptably against the benchmark concerning impedance and dissipation factors. However, its performance starts to show a notable decline in series resistance and dissipation factor when approaching medium-to-high test frequencies (above 100 kHz), suggesting that the capacitor may not be the ideal choice for projects requiring consistent performance across a wide frequency range.

It is important to consider the application's specific requirements when evaluating this capacitor. The KYOCERA AVX TAJD476M025RNJ tantalum molded capacitor may deliver satisfactory performance in low-frequency applications but may not be the best fit for designs with a broader frequency spectrum. It is recommended to weigh the capacitor's pros and cons based on the desired performance criteria to make an informed decision on whether it is an appropriate candidate for the intended usage.