TCU426340HDH

Series:	--
Part Status:	Active
Voltage - Off State:	2.6kV
Voltage - Gate Trigger (Vgt) (Max):	4.5V
Current - Gate Trigger (Igt) (Max):	250mA
Voltage - On State (Vtm) (Max):	1.35V
Current - On State (It (AV)) (Max):	4000A
Current - On State (It (RMS)) (Max):	6283A
Current - Off State (Max):	250mA
Current - Non Rep. Surge 50, 60Hz (Itsm):	75424A, 80000A
SCR Type:	Standard Recovery
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Chassis Mount
Package / Case:	TO-200AF
Supplier Device Package:	Hockey Puck

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Thyristors - SCRs: TCU426340HDH Application Field and Working Principle

Thyristors, also known as silicon controlled rectifiers, are a type of semiconductor device that is used primarily as a switch and control element in various systems requiring efficient energy control. This article will discuss the application fields and working principle of TCU426340HDH thyristor.TCU426340HDH thyristors are designed for use in rectifier and motor starting circuits, often in combination with other associated components such as resistors, capacitors, and inductors. This type of thyristor is a four-layer, high-voltage, medium-current device capable of blocking voltages as high as 600V and conducting a maximum current of 40A. It is well-suited for AC motor immobilization and DC motor control applications.There are several different types of thyristors, distinguished primarily by the type of gate control structure. The type used in TCU426340HDH is a gate turn-off thyristor, or GTO thyristor. This type has a controllable switching element with a third connection, sometimes referred to as a "gate contact." This gate contact is used to turn the thyristor ON and OFF, which is accomplished by providing a small voltage to the gate.The working principle of TCU426340HDH thyristors is readily understood by considering the various parts of their construction. The device consists of a four-layer structure consisting of a P-type semiconductor layer, an N-type semiconductor layer, and two gate contacts. When an external voltage is applied between the anode (positive) and cathode (negative) contacts, the gate contacts are left uncharged. As the applied voltage increases, it eventually reaches the "gate pinch-off voltage," at which point the gate contacts are charged, and the thyristor switches ON.Once the thyristor is ON, it will remain in that state until the current is reduced to zero or the externally applied voltage is reduced below the holding voltage. To turn the device OFF, the gate contacts must be shorted together, and the applied voltage reduced below the "gate threshold voltage." This is referred to as "gate turn-off," and it is how TCU426340HDH thyristors are controlled.In summary, TCU426340HDH thyristors are gate turn-off thyristors that are used in rectifier and motor starting circuits. The device is a four-layer structure consisting of a P-type semiconductor layer, an N-type semiconductor layer, and two gate contacts. The operating principle is based on controlling the gate contacts in order to turn the device ON and OFF. The device has a maximum blocking voltage of 600V and a maximum conducting current of 40A.

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