LASCRs

LASCR stands for Light Activated Silicon Controlled Rectifier. It is a type of thyristor that is triggered into conduction by light instead of an electrical signal. Like other SCRs, it is a four-layer semiconductor device that acts as a switch. When light of a sufficient intensity falls on the gate region of the LASCR, it generates electron-hole pairs, which then initiate the turn-on process. Once triggered, the LASCR remains in a conducting state until the current flowing through it drops below a certain holding current level or the voltage across it is reversed. LASCRs are useful in applications where electrical isolation is required between the control signal and the power circuit, or where it is desirable to trigger a high-power circuit remotely using a light source. Examples of use include optical relays, solid-state lighting controls, and high-voltage switching. They offer advantages such as immunity to electromagnetic interference and the ability to handle significant power loads. The sensitivity and wavelength response of a LASCR can be tailored during manufacturing for specific applications.