The Triac is a three terminal semiconductor for controlling current in either direction. A triac operates in the same way as the SCR however a triac operates in both a forward and reverse direction. A triac can be triggerred into conduction by either positive or negative gate signal.(consistant with polarity of the Anode to Cathode circuit)
Obviously a triac can also be triggered... Read more...More Product Announcements from American Microsemiconductor, Inc.