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High-Temperature Snubberless 8H Triacs Save Space and Boost Reliability in Industrial and Smart-Building Applications

800V 8H Snubberless Triacs from STMicroelectronics
800V 8H Snubberless Triacs from STMicroelectronics

STMicroelectronics’ new 800V 8H Triacs use the ST’s latest Snubberless high-temperature technology for achieving outstanding ruggedness in industrial, personal care, smart-home, and smart-building applications. The new device operates at full rated current at the maximum junction temperature of 150°C. This allows the heatsinks in the drives for AC loads to be up to 50% smaller to combine compact dimensions with high reliability. The low on-state voltage (VTM) ensures high operating efficiency and minimizes self-heating, thereby enabling the device to have a low leakage current that is stable over time to reduce standby losses.


With the current ratings from 8A to 30A, the 8H Triacs are suitable for rugged and efficient controls for HVAC systems, AC-motor drives, water heaters, room heaters, lighting systems, home appliances, and smart AC plugs. 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 device has a 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 8H Triacs are available in D2PAK, TO-220AB, and TO-220AB insulated packages, priced from $0.39 for orders of 1000 pieces.


Features of 800V 8H Snubberless Triacs

  • Current ratings from 8A to 30A
  • 800 V symmetrical blocking voltage
  • 150 °C maximum junction temperature Tj
  • Three triggering quadrants
  • High noise immunity - static dV/dt
  • Robust dynamic turn-off commutation - (dl/dt)


Note: More technical information can be found in the T1635H-8G Datasheet linked at the bottom of this page and on the 800V-8H-Triacs product page.

Component Datasheet

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