Up to 50% reduction in drive heatsink for AC loads
Withstands up to 6kV transient voltage and 2000V/µs voltage gradient


STMicroelectronics announced on the 8th that it has released the 800V 8H Triac.

The ST 800V 8H triac operates at full rated current up to 150°C junction temperature and reduces drive heatsinking for AC loads by up to 50%, providing high reliability. The new triac safely drives inductive loads and is ideal for effective control of HVAC systems, AC motor drives, water heaters, space heaters, lighting systems, home appliances, and smart AC plugs.

ST's proprietary Snubberless™ high-temperature technology significantly enhances stability. Low on-state voltage (V _TM ) ensures high operating efficiency and minimizes self-heating, resulting in low current leakage and long-term stability, reducing standby losses. A high critical turn-off current slope also prevents unwanted commutation.

The 8H family is available in current ratings from 8A to 30A. The 800V peak off-state voltage ensures performance in AC-powered applications, including three-phase equipment operating at up to 400V RMS. In addition to providing excellent noise immunity, it can withstand transient voltages of up to 6 kV and voltage gradients (dV/dt) of up to 2000 V/µs across the entire junction temperature range.

The ST 8H triac is currently available in D ² PAK, TO-220AB, and TO-220AB isolated packages, priced at $0.39 for quantities of 1,000. Higher quantities are available with additional pricing options.