BT139X-800,127

Series:	--
Packaging:	Tube
Part Status:	Active
Triac Type:	Standard
Voltage - Off State:	800V
Current - On State (It (RMS)) (Max):	16A
Voltage - Gate Trigger (Vgt) (Max):	1.5V
Current - Non Rep. Surge 50, 60Hz (Itsm):	155A, 170A
Current - Gate Trigger (Igt) (Max):	35mA
Current - Hold (Ih) (Max):	45mA
Configuration:	Single
Operating Temperature:	125°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3 Full Pack, Isolated Tab
Supplier Device Package:	TO-220F
Base Part Number:	BT139

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Thyristors - TRIACs

BT139X-800,127 application field and working principle

Thyristors (or SCRs - Silicon-Controlled Rectifiers) are two-terminal semiconductor devices widely used in power switching circuits. They are formed by a combination of n-type and p-type semiconductor layers. This type of semiconductor has the unique property of switching ON with only a very small voltage applied to the gate electrode when the circuit is biased in the proper direction. The TRIAC (Triode AC switch) is an electronic switching device that combines the characteristics of two separate thyristors and the traditional bipolar transistor. This device allows the direction of flow of electrical current to be con rotated in clockwise or counter-clockwise direction according to the specific application.The BT139X-800,127 is a medium power TRIAC with a blocking voltage of 800 V and a maximum gate current of 127mA. It is commonly used in power control circuits, low cost motors, solenoid actuators, dimmers, soft starters and in other applications requiring AC output. This device can also be used to limit the current in a circuit and protect it against overload or voltage transients.The principle of operation of the BT139X-800,127 is based on the "Mandelbrot effect". When a positive gate current is supplied to the device, it is forced to enter the “ON” state and remain in the “ON” state until the gate current is removed or until the current is cut off due to overload or voltage transients. The turning ON and OFF of the BT139X-800,127 is controlled by the gate current, so in order to turn the device OFF, the gate current should be limited or removed. The BT139X-800,127 has many advantages compared to other power control devices. The device has a low saturation voltage which improves efficiency in applications with restricted voltage margin. In addition, the device is low cost and has good thermal properties, making it well suited for use in high temperature environments. The BT139X-800,127 is also relatively easy to use, requiring only a few components to connect in order to control current in a circuit. The device is also available in a variety of package sizes, making it suitable for many different applications.In conclusion, the BT139X-800,127 is a reliable and robust medium power TRIAC that offers low cost and high speed switching in a wide range of applications. It is well suited for applications requiring voltage and current control and overload protection. The device is easy to use and integrates well into control circuits.

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