Friday, June 21, 2024

High-Temperature 8H Triacs Save Space And Boost Reliability

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Capable of safely driving inductive loads, the devices create rugged and efficient controls from HVAC systems to smart AC plugs

Operating at full rated current up to a maximum junction temperature of 150 degrees Celsius are the new 800V 8H Triacs. They allow heatsinks in AC load drives to be up to 50 per cent smaller to meet compact dimension requirements with high reliability.

Suited to industrial, personal care, smart-home and smart-building applications, the new Triacs leverage Snubberless high-temperature technology for achieving outstanding ruggedness. With low on-state voltage (VTM), it ensures high operating efficiency and minimised self-heating. The devices also have low leakage current that is stable over time to reduce standby losses. Additionally, robust dynamic performance with high critical turn-off current slope prevents unwanted commutation.

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Capable of safely driving inductive loads, the 8H Triacs let designers create rugged and efficient controls for HVAC systems, AC-motor drives, water heaters, room heaters, lighting systems, home appliances and smart AC plugs.

The complete 8H family spans current ratings from 8A to 30A. The peak off-state voltage of 800V ensures robust performance in AC-line-powered applications, including 3-phase equipment operating from up to 400V RMS. The devices benefit from high noise immunity and can withstand voltage fast transients up to 6kV and voltage gradient (dV/dt) up to 2000V/µs across the full junction-temperature range.

The 800V 8H Triacs are in production now in D2PAK, TO-220AB and TO-220AB insulated packages, which are available from STMicroelectronics.


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