Definitions of Technical Engineering Terms
"A" "B" "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M",
"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"

Thyristor Types

Thyristor. A bi-stable semiconductor device that comprises three or more PN junctions and can be switched from the off-state [non-conducting] or on-state [conducting] to the opposite state. A Thyristor acts as a semiconductor switch when it receives a Gate signal and continues to conduct as long as the Anode and Cathode is forward biased. Companies that produce Thyristor components. The term is used with Silicon Controlled Rectifiers but may also refer to other pnpn semiconductors.

Bi-directional diode thyristor. A two terminal thyristor having substantially the same switching behavior in the first and third quadrants of the principal voltage-current characteristic.





Bi-directional triode thyristor. An n-gate or p-gate thyristor having substantially the same switching behavior in the first and third quadrants of the principal voltage-current characteristic. Examples include the 2N5806, 2N5807, 2N5808 and 2N5809.

GTO. Gate Turn off Thyristor. A thyristor that turns on with the application of a positive voltage at the Gate lead, and turns off with a negative voltage applied to the gate [voltage with respect to the cathode]. A normal thyristor does not turn off when the gate voltage changes.

N-gate thyristor. A three-terminal thyristor in which the gate terminal is connected to the n-region adjacent to the region to which the anode terminal is connected and that is normally switched to the on-state by applying a negative signal between gate and anode terminals.

P-gate thyristor. A three-terminal thyristor in which the gate terminal is connected to the p-region adjacent to the region to which the cathode terminal is connected and that is normally switched to the on-state by applying a positive signal between gate and cathode terminals.

Programmable Unijunction Transistor. PNPN. Examples include 2N6116, 2N6117, 2N6118, 2N6137 and 2N6138.

Reverse blocking diode thyristor. A two-terminal thyristor that switches only for positive anode to cathode voltages and exhibits a reverse blocking state for negative anode to cathode voltages.

Reverse blocking triode thyristor. An n-gate or p-gate thyristor that switches only for positive anode to cathode voltages and exhibits a reverse blocking state for negative anode to cathode voltages. Example devices include;[TO-94] 2N1792, 2N1793, 2N1795, 2N1797, 2N1798, 2N1799, 2N1800, 2N1805, 2N1806, 2N1910, 2N1911, 2N1913, 2N1915, 2N1916, 2N2023, 2N2024, 2N2025, 2N2027, 2N2029, and 2N2030. Also in a TO-5 Package 2N2323, 2N2324, 2N2326, 2N2328 and 2N2329. Also the TO-18 Package containing the 2N3027, 2N3028, 2N3029, 2N3030, 2N3031 and 2N3032.

Reverse conducting diode thyristor. A two terminal thyristor that switches only for positive anode to cathode voltages and conducts large currents at negative anode to cathode voltages comparable in magnitude to the on-state voltage.

Silicon Controlled Rectifiers. Thyristors. Examples include [TO-208 Package] 2N682, 2N683, 2N685 through 2N692, 2N692A and 2N5206. Also the [TO-64 Package] 2N1771A, 2N1772A, 2N1774A, 2N1776A, 2N1777A, 2N1778A, and 2N2619A.


Thyristor Semiconductor Structure
Thyristor


 
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