BT138-800G,127

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Thyristor-TRIACs are an important type of thyristors and are widely used for controlling current. Invented in 1952, TRIACs are analogues to thyristors, but instead of firing in the direction of the current, they shut off when the current reaches a certain value. The general description of TRIACs is a three-terminal device made of a PNPN structure of diodes and thyristors, with each gate controlling the three PN junctions. TRIACs are typically used in applications that require current or voltage control, including speed control, solid-state relays, and AC power switching.

The BT138-800G,127 application field and working principle, is an example of the TRIAC thyristor family. Specifically, these are thyristors with a highcommutating capacity, performing dual, bidirectional control over current and voltage. The BT138-800G is rated at 800V, 8 Amp and features a two-part construction to feature a smaller package that\'s easy to install, even with limited space. The BT138-800G is used in a variety of circuits, including LED lighting, AC windings and high-voltage controllable resistor applications. This type of thyristor works with power circuits and AC current, and offers robust gate control for reliable performance, even in adverse conditions.

In terms of working principle, the BT138-800G is a three-terminal thyristor that primarily operates in the bidirectional switching mode. To control the current flowing through it, the BT138-800G features a two-stage, two-part structure and a gate-controlled switch. The two-stage structure consists of two PNPN structures and two gate elements. First, the current flows through the first PNPN structure to be able to reach the gate phase. Once the current reaches the gate phase and a voltage of around 2 V is applied to the gate, the thyristor will be in its firing state. After the switching by the gate phase, the current flows through the second PNPN structure, ultimately being controlled by the second gate element. When the voltage applied to the gate reaches the breakover point, the thyristor switches off, and the current is stopped once the current voltage valve is out of the firing range.

In summary, the BT138-800G, 127 application field and working principle is a thyristor device commonly used in power cycle switching, AC windings and high voltage controllable resistor applications. It features a two-part construction to provide efficient current and voltage control, with a two-stage and two-gate control system. When the voltage applied to the gate reaches the breakover point, the triac switches off, thus limiting the maximum current.

The specific data is subject to PDF, and the above content is for reference