Snubberless Triac Drive Optocouplers

onsemi FOD420 and FOD4208 snubberless triac drive optocouplers, feature a built-in active dv/dt clamp providing best-in-class noise immunity (dv/dt) of 10,000 V/µs, which is superior to the average dv/dt rating (1,500 V/µs) of monolithic triacs. This superior performance eliminates the RC snubber network required for lower dv/dt rated monolithic opto triac drivers and saves valuable design time and bill of material (BOMs) costs. Their high noise immunity makes these products ideal for noisy industrial environments because they offer a more robust solution for isolating solid-state relays, AC motor controls and lighting ballasts.

onsemi's triac drive optocouplers provide 5,000 V of isolation while controlling the power triacs that switch the load. Therefore, these optocouplers can be used in conjunction with onsemi's discrete power triacs such as the FKN08PN60S and the FKPF8N80. Both are part of onsemi's comprehensive portfolio of optoelectronic solutions that offer a broad range of package platforms and various input and output configurations to address the challenges of general switching, AC load switching and many other applications.

The FOD420 and FOD4208 products utilize lead-free (Pb-free) terminals and have been characterized for moisture sensitivity in accordance with the Pb-free reflow requirements of the joint IPC/JEDEC standard J-STD-020. All of onsemi's products are designed to meet the requirements of the European Union's Directive on the restriction of the use of certain substances (RoHS).