BT138-600E/DGQ

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Thyristors - TRIACs

A TRIAC is a three-terminal, bidirectional, solid-state semiconductor device. Also known as a thyristor, TRIAC stands for “triode for alternating current” and it consists of three main terminals - Gate (G), Anode (A) and Cathode (C). It is used to control the power flow of alternating current. The BT138-600E/DGQ is a member of the BT138 series of TRIACs.

BT138-600E/DGQ Application Field

The BT138-600E/DGQ is ideal for use in many applications, such as lighting for home and commercial, motor control and industrial applications, heating and AC control, switch mode power supplies, and as an on/off switch for a variety of loads. It can also be used as a low-voltage switch to control high-power AC devices. The BT138-600E/DGQ features a high current capacity, low switching losses and long lifetime.

BT138-600E/DGQ Working Principle

The BT138-600E/DGQ works when a positive voltage is applied to the anode and negative voltage to the cathode. As the Gate voltage increases, the BT138-600E/DGQ will start to turn on, allowing current to flow between the Anode and Cathode. As the Gate voltage continues to increase, the current flowing across the device will start to increase, up to its rated current. When the Gate voltage is removed (or taken below the breakdown voltage of the device), the device will turn off.

The BT138-600E/DGQ can also be operated in reverse conduction, meaning that if a negative voltage is applied to the Anode, and a positive voltage to the Cathode, then the same principle will apply, except that the current flow will be reversed. This is an important feature for many motor control applications, as it allows for more precise control of motor speed.

When using the BT138-600E/DGQ in applications, it is recommended to use protective components such as suppressor capacitors or snubber circuits to protect against transient voltages or currents. This is to ensure that the device remains operational, and that it is not damaged due to electrical overloads.

Summary

The BT138-600E/DGQ is a member of the BT138 series of TRIACs, which is used to control the power flow of alternating current. The BT138-600E/DGQ is ideal for use in many applications, such as lighting, motor control, and switch mode power supplies. The BT138-600E/DGQ works by having a positive voltage applied to the Anode and negative to the Cathode. When the proper Gate voltage is applied, current will flow between the Anode and Cathode and when the Gate voltage is removed, the device will turn off. It is important to use protective components to protect against transient voltages or currents to ensure that the device remains operational.

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