THB Film Capacitors for High Performance Applications
Reliable THB Film Capacitors
AISHI launches exceptionally reliable 2,000 hours THB film capacitors suitable for high power industrial and automotive applications requiring high stability.
The corrosion-related loss of capacitance is caused by the so-called "temperature humidity bias" (THB). The THB technology is originally known from X2 capacitors, which should keep a stable capacity over a longer lifetime. Especially when used in series with the mains, this was very important for a stable, long-term function of power supplies.
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The THB Technologie Offers Highly Reliable Products for Harsh Environmental Conditions
Standard X2 capacitors are designed for fast self-healing and safety due to a high proportion of zinc in the metallisation. In particular, higher relative humidity leads to rapid loss of capacitance, so their use in capacitive power supplies or voltage dividers is not advisable. THB capacitors are specially treated, special materials are used and the manufacturing process is different.
Further tests have shown that DC capacitors are also susceptible to capacitance losses and increased power dissipation. Therefore, this technology has been applied more and more to other types of film capacitors, such as DC link or pulse capacitors, in order to offer highly reliable products for harsh environmental conditions. The increased capacitance stability guarantees long-term reliable operation of various devices, such as solar inverters, UPS or DC charging stations.
The Capacitors Offer Twice the Service Life Compared to Conventional THB
AISHI has made further improvements relating to raw materials, design and the production process. As a result, these capacitors pass a 2,000-hour test at 85°C and 85% relative humidity with rated voltage and offer twice the service life compared to conventional THB Class IIIB products. In addition, they are AEC-Q200 certified and available in automotive grade.
Following graphs show the improvement:
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For more information, please contact Roland Trimmel.
