BTA140-800,127

Thyristors – TRIACs

BTA140-800,127 application field and working principle

The BTA140-800/127 is a bi-directional triode thyristor (TRIAC) featuring an 800V blocking voltage (BV). It was designed for mains frequency applications operating in an isolated environment. This component can be used in applications such as light dimmers, sequential circuits and heating control systems.

It is a three terminal component that works as a switch for both positive and negative half cycles of the input voltage. The gate terminal is used to control the current flow between the main terminals. This component is designed to be used in alternating current (AC) circuits, which means that they can carry both positive and negative current.

The working principle of the BTA140-800/127 can be explained as follows: The gate terminal on the thyristor receives input control, and when the input actually reaches the required level, then the thyristor switches on. The thyristor controls the current flow between the main terminals, and this current flow is determined by the voltage applied to the gate terminal.

The BTA140-800/127 can also be used in static switching. The static switching is the process of using a thyristor to control the voltage or current flow in a circuit without moving parts. The basic principle is that when the output current equals or exceeds the gate current, the thyristor will switch on and remain on until the current flow is reversed. The advantage of using this type of control is that it eliminates the need for mechanical relays or contactors.

The BTA140-800/127 has a wide range of uses in industrial, commercial, and home automation. Some examples of uses include phase control circuits, motor control circuits, heater control, light dimmer circuits, and sequential circuits. It can also be used in motor start applications, where it can protect induction motors from inrush and surge currents at start-up.

In conclusion, the BTA140-800/127 is a triode thyristor featuring an 800V blocking voltage for mains frequency applications operating in an isolated environment. It can be used in static switching and a range of different applications from lighting dimmers to motor control. It is easy to use and provides reliable and accurate control of power circuits.