TMA256B-L

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Thyristors - TRIACs is a type of semiconductor device typically used for powering and controlling high power AC electrical equipment. A TRIAC, or “triode for alternating current”, is a three-terminal device that utilizes two thyristors connected back-to-back, with the AC line connected across them.

One of the most popular TRIAC devices is the model TMA256B-L, which features low ON-state voltage drop, low gate triggering current, and increased power handling capabilities. This device has a maximum RMS On-state current of 16A and a maximum surge current of 50A.

The TMA256B-L functions as a low power, high power switch. It is used to control the flow of alternating current (AC) in electrical circuits, allowing AC current to flow when the device is on, and blocking it when it is off. The TMA256B-L has two terminals that are connected together to create a trigger signal to the gate, and the other two terminals connected to the external load.

The TMA256B-L has two switching states, breakover and off-state. In the breakover state, the thyristor is not conducting but its firing characteristics are such that when the current reaches a certain amount it will begin to conduct current. In the off-state, the thyristor will block current and prevent any AC current from flowing.

The main application of the TMA256B-L is in the control of high power AC equipment. It is typically used in motor control applications such as elevators, pumps, and other industrial devices. In addition, it can be used in residential and commercial dimming applications, as well as fire safety systems.

The working principle of the TMA256B-L is similar to other TRIACs. The circuit is made up of two thyristors connected in series with the AC line connected to one end. When a trigger signal is applied to the gate, the thyristors will become conductive and the AC current will begin to flow. The ON-state voltage drop, or the difference between the input voltage and output voltage, is kept as low as possible in order to reduce power loss.

The TMA256B-L is a powerful, reliable, and versatile TRIAC device that can be used in many different applications. Its low ON-state voltage drop, low gate triggering current, and increased power handling capabilities make it a popular choice for AC power control applications. With its wide range of applications and capabilities, the TMA256B-L is a great choice for any high power AC system.

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