IS200VTURH2BAC | GE | Solid state aluminum electrolytic capacitor

Description

IS200VTURH2BAC | GE | Solid state aluminum electrolytic capacitor

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Excessive ESR dissipation can also lead to capacitor overheating and failure. Both solid-state aluminum electrolytic capacitors and capacitors have the characteristic of low ESR. Under the same ESR performance as IS200VTURH2BAC, tantalum capacitors are much more expensive than solid-state aluminum electrolytic capacitors. Due to cost considerations, some electronic detonator manufacturers choose low-priced tantalum capacitors with ESR values that are more than twice that of solid-state aluminum electrolytic capacitors. The thermal stability of manganese dioxide in the negative electrode of tantalum capacitors is poor, and it will decompose and release high concentrations of oxygen at high temperatures. If it comes into contact with tantalum metal in a closed space, it will explode. Therefore, during the charging and discharging process of electronic detonators, high currents can easily lead to the failure of tantalum capacitors and cause accidents.

Select 3 types of commonly used energy storage capacitors for electronic detonators, randomly select 5 samples each, and label them as solid aluminum electrolytic capacitors D, domestic tantalum capacitors E, and imported tantalum capacitors F. At room temperature of 25 ℃, a total of 15 sample capacitance values, ESR, and leakage current were obtained for three types of capacitors loaded with DC voltages of 16 V, 20 V, and 24 V. From Figure 1 to Figure 3, it can be seen that there is no significant correlation between the capacitance values of tantalum capacitors E and F and voltage bias. The capacitance value of IS200VTURH2BAC solid-state aluminum electrolytic capacitor D slightly increases with increasing voltage bias. All three types of capacitors have no sudden decrease in capacitance with voltage changes. Solid aluminum electrolytic capacitors have higher capacitance under high voltage, which is beneficial for energy storage. The ESR test shown in Figure 5 shows that the highest ESR of tantalum capacitor E has reached 1.6 Ω, while the typical bridge wire resistance is around 2 Ω, and the discharge tube conduction resistance is about 0.05 Ω. From this analysis, it can be inferred that energy consumption on ESR is close to 43% when the current is high, which poses a danger. The ESR of solid aluminum electrolytic capacitors D and tantalum capacitors F in Figures 4 and 6 are both within a reasonable range, and the ESR of solid aluminum electrolytic capacitors is lower, which is conducive to reliable detonation.

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