MOS Controlled Thyristor
Encyclopedia
MOS Controlled Thyristor (or MCT) is voltage controlled fully controllable thyristor
. The MCT is similar in operation with GTO thyristor, but it has voltage controlled insulated gate. It has two MOSFET
s in its equivalent circuit. One is responsible for turn-on and the another is responsible for turn-off. A thyristor with only one MOSFET in its equivalent circuit, which can only be turned on (like normal SCRs), is called a MOS Gated Thyristor.
Positive voltage on the gate terminal with respect to the cathode turns the thyristor to the on state.
Negative voltage on the gate terminal with respect to the anode, which is close to cathode voltage during the on state, turns the thyristor to the off state.
Thyristor
A thyristor is a solid-state semiconductor device with four layers of alternating N and P-type material. They act as bistable switches, conducting when their gate receives a current trigger, and continue to conduct while they are forward biased .Some sources define silicon controlled rectifiers and...
. The MCT is similar in operation with GTO thyristor, but it has voltage controlled insulated gate. It has two MOSFET
MOSFET
The metal–oxide–semiconductor field-effect transistor is a transistor used for amplifying or switching electronic signals. The basic principle of this kind of transistor was first patented by Julius Edgar Lilienfeld in 1925...
s in its equivalent circuit. One is responsible for turn-on and the another is responsible for turn-off. A thyristor with only one MOSFET in its equivalent circuit, which can only be turned on (like normal SCRs), is called a MOS Gated Thyristor.
Positive voltage on the gate terminal with respect to the cathode turns the thyristor to the on state.
Negative voltage on the gate terminal with respect to the anode, which is close to cathode voltage during the on state, turns the thyristor to the off state.