Series:	--
Packaging:	Tube
Part Status:	Obsolete
Triac Type:	Logic - Sensitive Gate
Voltage - Off State:	1.2kV
Current - On State (It (RMS)) (Max):	12A
Voltage - Gate Trigger (Vgt) (Max):	1.3V
Current - Non Rep. Surge 50, 60Hz (Itsm):	120A, 126A
Current - Gate Trigger (Igt) (Max):	10mA
Current - Hold (Ih) (Max):	15mA
Configuration:	Single
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3
Supplier Device Package:	TO-220AB

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Thyristors - TRIACs

CTB12-1200SWPT Application Field and Working Principle

Thyristors are one of the most widely used solid-state switches in the off-state and can control high power. TRIACs, consisting of three terminals (T1, T2 and Gate), are bi-directional semiconductor switches that can handle a range of AC and DC voltages. The CTB12-1200SWPT is a TRIAC belonging to the TO-220AC package type that is suitable for applications in a wide range of consumer, industrial and commercial applications.

Application Field

The CTB12-1200SWPT is designed for lighting control, including halogen and xenon lamps, and motor speed control. In addition, the CTB12-1200SWPT can be used for temperature and humidity control, or for high voltage transmission in industrial environments. As one of the most reliable and dependable TRIACs available on the market, the CTB12-1200SWPT can be found in a variety of applications, ranging from lighting and motor control to drive circuits for traction systems.

Working Principle

The CTB12-1200SWPT is a three terminal- switch which has a voltage tolerance range of 1200V. The working principle of the CTB12-1200SWPT is similar to a thyristor, with each of its three terminals providing specific functions. Specifically, the Gate terminal is used to control the switch operation by opening and closing. When the Gate terminal is triggered by a positive pulse, the positive voltage between the Gate and T1 terminals will conduct electricity through the CTB12-1200SWPT, allowing the current to flow between the two main terminals – T1 and T2. The current will flow through the T1 and T2 until it reaches the point of breaking of the device, either overtemperature or overvoltage. Once the breakpoint is reached, the switch recovers its original non-conductive state. By controlling the Gate terminal, the current between T1 and T2 terminals can be controlled. By applying a negative voltage on the Gate terminal, current will stop flowing as the junction between T1 and T2 will de-energize. The current can be resumed by applying a positive voltage to the Gate terminal.

Conclusion

The CTB12-1200SWPT enables efficient and flexible control of AC and DC voltages. It is one of the most reliable and dependable TRIACs available in the market and is suitable for a wide range of applications, from lighting and motor control to drive circuits for traction systems. Its working principle is the same as for a thyristor, allowing the user to control the current between its two main terminals.

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