Consequently, the process of fabricating the silicon leads to the production of cheaper devices. The DIAC starts conducting electric current if the applied voltage goes beyond its break-over voltage. The term DIAC stands for the DIode for Alternating Current (DIAC), it is a bidirectional semiconductor switch that can be turned ON in both forward and reverse direction. You could have noticed,  although it belongs to the thyristor family it does not have a controlling gate terminal because they can be turned on or off by simply reducing the voltage level below the avalanche breakdown voltage and it can be done in both the polarities. Durham Integrated Arts Camp (DIAC) is a fully immersive arts camp open to Grades 7 - 12 students who attend a Durham District School Board (DDSB) school. Most of the DIACs will be having the breakdown voltage around 30 Volts, the exact breakdown voltage will be based on the type of the device. Once the applied voltage reaches the breakdown voltage the resistance of the DIAC drops abruptly and then it starts conducting which leads to a sharp decrease in voltage and the current starts increasing, which is mentioned as a conduction state in the curve. As the applied voltage is increased, the leakage current will continue to flow until the voltage reaches the breakover voltage VBO. The Above circuit shows the typical structure of the DIAC-TRIAC combination used for smooth control of AC power to a Heater. 11 2007 upon their approval by H.H. Diode Alternating Current (DIAC) or Diode for Alternating Current, is a two-terminal semiconductor device that can conduct current in either direction depending on the voltage connected to its terminals. Read more . Favorite Answer. Fax: +971 (4) 2028668. Why you should definitely order from us . Full form of all the above short forms are on the list, please refer. Reply. Man spricht beim Diac deshalb auch von einem bidirektionalen Schalter. Einfach und verständlich, nach so einem Buch habe ich schon lange gesucht. When breakdown occurs, the diode enters a region of negative dynamic resistance , leading to a decrease in the voltage drop across the diode and, usually, a sharp increase in current through the diode. The V-I characteristic curve of the DIAC will be in the shape of a Z and the curve will be lying on the first and third quadrants because they conduct in both the positive and negative polarity. It conducts current only in one direction. Couldn't find the full form or full meaning of DIAC? Couldn't find the full form or full meaning of DIA? DIAC is given by the symbol of two Diodes connected in parallel and opposite to one another and has two terminals. Der Diac kann durch seinen bidirektionalen Aufbau auch Wechselspannungen schalten. Diac Medical in 90 seconds . document.write("Letzte Änderung: " + day + "." If you want a TRIAC to conduct you need to provide a positive or negative pulse to the gate, in order to provide symmetric firing the DIAC are mostly used along with the TRIAC circuit. • The full form of SCR is Silicon Controlled Rectifier. But when it comes to switching AC waveforms, we can frequently notice the TRIAC being used to switch current in both directions.