BT138B-600E,118 Datasheet/PDFThyristors - TRIACs are a form of semiconductor component with three terminals which function as a switch or an amplifier. One of these components, the BT138B-600E, is an extremely reliable component used in various applications. In this article, the application field and working principle of the BT138B-600E will be discussed.
Applications of BT138B-600E
The BT138B-600E is mainly used for phase control applications. It is designed to switch the current on or off. It can be used for dimming, motor speed control and control of other electrical appliances. It can also be used in lighting circuits, inverters, converters, UPS systems, and power supplies. Furthermore, it can be used as a replacement for traditional relays, electromechanical relays, and in PLC applications.
Working Principle of BT138B-600E
The BT138B-600E is a three-terminal device that consists of two PN junction diodes, a gate electrode, and a main electrode. It has an off-state voltage between the main electrodes of around 600V and a gate current of 1mA. It also has a maximum turn-on voltage of 1.4V. The device is triggered by the gate current which allows the main current to flow through it. The main current is then controlled by the gate current. In addition, the turn-on and turn-off of the BT138B-600E is much faster than that of an SCR.
The BT138B-600E is usually operated in TRIAC mode, wherein the gate current is used to control the main current. The main current will increase from zero to the maximum value when a positive gate current is applied. Similarly, a negative gate current will cause the current to decrease to zero. In order to turn the BT138B-600E off, the gate current must be set to zero.
The BT138B-600E can also be operated in Quadrac mode, wherein the main current is controlled by the gate current and the voltage. When a positive gate current is applied, the main current increases from zero to the maximum value when the voltage reaches its minimum value. Similarly, a negative gate current will cause the current to decrease to zero when the voltage reaches its maximum value.
Conclusion
The BT138B-600E is a reliable three-terminal device which can be used for various applications. It can be used for phase control, dimming, motor speed control and control of other electrical appliances. Its working principle revolves around the gate current which is used to control the main current. It can be operated in TRIAC or Quadrac mode depending on the application. The BT138B-600E is thus a useful device for controlling currents in many applications.