Difference between Opto Triac and Opto Isolator | Opto Triac vs Opto Isolator
This page compares Opto Triac vs Opto Isolator and mentions difference between Opto Triac and Opto Isolator.
The figure-1 depicts Opto Triac circuit symbol. It is 4 layer and 3 terminal device.
It blocks current in OFF state. It conducts current in both the directions when it
is triggered by gate pulse. The triac which operates based on light signal is known as
opto triac. The LED is used as shown which provides light for triac to conduct.
LED emits light when powered ON.
Refer Diac Vs Triac and SCR vs Diac vs Triac vs UJT for more information.
Figure 2 depicts opto isolator which uses LED and phototransistor.
The device prevents and blocks light reflections back to the device where it is used.
This prevents damage due to high optical power. The isolation and insertion loss are the two main
parameters to be considered while selecting opto-isolator for use.
Refer Opto Isolator>> for more information.