Since the invention of the incandescent lamp by Thomas A. Edison in 1878 there has been little change in the concept. Nowadays we use such lamps in our homes and they are part of our normal comfort but, since we are more environmentally conscious and more demanding on energy cost savings, along with durability, we present an application for this simple incandescent lamp with the bilateral trigger semiconductor called a SIDAC, offering an alternative way to save energy and offering a longer lamp life.

Theory Of The SIDAC

The SIDAC is a high-voltage bilateral device that extends trigger capabilities to significantly higher voltages and currents than have been previously obtainable allowing for new, cost-effective applications. As a bilateral device it will switch from blocking to conduction when the applied voltage, of either polarity, exceeds the breakover voltage. As in other trigger devices, the SIDAC switches through a negative resistance region to the low voltage on-state and will remain so until the main terminal current is interrupted, or drops below the holding current.

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