NTA-NET (UGC-NET) Electronic Science (88) Power Devices-Triac Study Material (Page 1 of 1)

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TRIAC: Symbol, Different Modes of Operation, Characteristics of TRIAC, Applications

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  • TRIAC is a bidirectional switching device with three terminals, namely main terminal 1 () and main terminal 2 () and Gate terminal (G) .
  • The symbol and basic structure of TRIAC is given below.

Symbol

Fig. Symbol of TRIAC
Fig. Construction of TRIAC
Fig. Equivalent Circuit of TRIAC

Different Modes of Operation

Construction

  • TRIAC is the equivalent of two transistors, which are, connected in parallel opposing directions.
  • It can work as a switch bi-directionally.

Operation

  • Based on main terminal and gate terminal voltage, the TRIAC can be operated in four different modes of operations.
  • The diagram of TRIAC for four different opera…

… (264 more equations, 96 figures) …

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