Global Organization
VISHAY INTERTECHNOLOGY, INC. Vishay supplies surface mount molded and conformal coated solid tantalum capacitors with MnO2 and polymer cathode constructions. The conformal coated devices meet moisture sensitivity level rating (MSL) of 2a as specified in IPC / JEDEC® J-STD-020E and are dry packaged in moisture barrier bags (MBB) per J-STD-033.
Moisture can penetrate through polymer encapsulating materials degrading characteristics of the solid electrolyte, cathode attachment materials, and tantalum pentoxide dielectric, and causing failures of the capacitors.
Moisture-related degradation of materials used in tantalum capacitors, failure mechanisms, and the effectiveness of the existing moisture resistance qualification testing are discussed. 1. Introduction. Surface mount solid tantalum capacitors used in military and aerospace applications are typically manufactured in non-hermetic plastic cases.
To remove excess moisture, capacitors can be dried at 40 °C for 168 h (standard “dry box” conditions). For detailed recommendations, please refer to J-STD-033. Conformal coated series: 591D, 592D, 592W, 195D, 695D, 594D, 595D, 597D, T95, T96, T97, T98, 13008, and 14002.
The current reliability criterion (RC) of the film capacitor (FC) is usually a fixed value, which does not consider the staged capacitance loss caused by moisture diffusion under high temperature and/or high humidity. The expected lifetime of capacitors would deviate far from the actual one.
Additional testing of tantalum capacitors, research of moisture-induced degradation processes in used materials, and analysis of accelerated factors of the degradation processes are necessary to develop qualification techniques, which would assure reliability of the parts in moisture environments.
Moisture Sensitivity Level 1 • Surface mount multilayer capacitors • Meet Class Y2/X1, X1 and X2 requirements • Approved for mains ac voltages up to 305Vac • Approved by UL, TÜV • Sizes …
The ambient moisture would diffuse into the film capacitor under the humid environment. The corrosion of electrodes would occur under ac voltage stress with the participation of the …
The moisture resistance of epoxy resins depends mainly on two factors: (1) Molecular structures: water molecules diffuse into the molecular gaps (50–200 nm []) of the …
Figure 1. Variation of capacitance, DCL, and ESR for the 4.7 µF capacitors measured after different environmental conditions, sequentially: 72 hrs./125 oC bake; moisturizing at 85 …
This paper presents experimental capacitors embedded in FR-4, and finite element simulations of moisture absorption in various dielectric materials. Technological …
Vishay supplies surface mount molded and conformal coated solid tantalum capacitors with MnO2 and polymer cathode constructions. The conformal coated devices meet moisture sensitivit y …
This paper presents experimental capacitors embedded in FR-4, and finite …
However, the measured IR data, as seen in Fig. 4b, from the moisture-resistant sealing materials can be described as a power function of the elapsed time, namely, R(t) = R o …
to explain parametric changes in tantalum capacitors caused by environmental conditions. Moisture -related degradation of materials used in tantalum capacitors, failure mechanisms, …
The water-repellent treatment film acts to delay the formation of droplets of water on the surface of the capacitor due to condensation. In addition, the characteristics of this treatment film …
The current reliability criterion (RC) of the film capacitor (FC) is usually a fixed value, which does not consider the staged capacitance loss caused by moisture diffusion …
Detecting the moisture content of grain accurately and rapidly has important significance for harvesting, transport, storage, processing, and precision agriculture. There are some problems with the slow detection …
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Capacitive Soil Moisture sensor: Capacitive soil moisture sensor. The sensor measures the soil moisture levels by capacitive sensing, rather than resistive sensing like …
Placing an aluminum electrolytic capacitor in high-temperature, high-humidity conditions could …
capacitors after a low-voltage, 85%-relative-humidity, 85° C test was performed. Case removal revealed silver whisker growth on the chips between the non-coated solder area or the end …
・ Resin-encased film capacitor that offers both humidity resistance and flame retardancy, and that is suitable for DC link circuits used in high-humidity environments. ・Guaranteed …
For additional Detail on Surface Mount Capacitors/Inductors configurations see our Download area:. User Manual For Series-thru Test Fixture User Manual For Shunt-thru Test Fixture …
to explain parametric changes in tantalum capacitors caused by environmental conditions. …
capacitors after a low-voltage, 85%-relative-humidity, 85° C test was performed. Case removal …
Placing an aluminum electrolytic capacitor in high-temperature, high-humidity conditions could cause a moisture incursion from the seal into the inside of the capacitor. This could result in …
Vishay supplies surface mount molded and conformal coated solid tantalum capacitors with …
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