Difference Between SCR and Triac. plz ans fast guy's
Answers
SCR TRIAC
SCR stands for silicon controlled rectifier. TRIAC stands for triode for alternating current.
The SCR is unidirectional device. The TRIAC is bidirectional device.
It available in large ratings. It available in smaller ratings.
The SCR control DC power. The TRIAC control DC as well as AC power.
The SCR can be triggered by positive gate voltage only. The TRIAC can be triggered either by positive or negative gate voltage.
In SCR only one mode of operation is possible. In TRIAC four different modes of operation is possible.
It is more reliable. It is less reliable.
The SCR conduct current in one direction only. The TRIAC conduct current in both the directions.
It needs two heat sink. It needs only one heat sink.
1. SCR stands for silicon controlled rectifier. TRIAC stands for triode for alternating current.
2. The SCR is unidirectional deviceThe TRIAC is bidirectional device.
3. It available in large ratings. It available in smaller ratings.
4. The SCR control DC power. The TRIAC control DC as well as AC power.
5. The SCR can be triggered by positive gate voltage only. The TRIAC can be triggered either by positive or negative gate voltage.
6. In SCR only one mode of operation is possible. In TRIAC four different modes of operation is possible.