S4055WTP

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Thyristors are a class of semiconductor devices related to the diagram of diodes and transistors. They are primarily used in power control circuits and other switching applications, but can also be found in LED circuits, analog circuits, and some logic gates. Thyristors are used in a variety of scenarios due to their unique electrical characteristics like three-stage integration control, high current density, low gate power consumption, and low voltage drop. Among its many applications, thyristors are used for power control in switching power supplies, motor speed controls, heating elements, radio and power transmitters, power meters, and lighting systems. The most popular thyristor is the silicon-controlled rectifier (SCR).

The S4055WTP is a Thyristors – SCR (Silicon Controlled Rectifier) designed specifically for applications requiring low-reverse voltage holding or surge current protection. It is available in 3 versions: unidirectional, bidirectional and two-quadrant. The S4055WTP is the optimal choice for a variety of applications, such as in short circuit protection, industrial motor control, power switching, and over voltage protection. It is available in a range of packaging options, including TO220, TO-252, and TO-247.

The S4055WTP has a typical gate sensitivity of 2V and an on-state voltage of up to 25V. It is rated for a continuous current at 25°C of 75A and a forward peak current of 400A. Its reverse blocking voltage is rated up to 800V and it is rated for an average on-state power dissipation of 100W. The S4055WTP is designed with an internal overheating protection circuit and a temperature rise of up to 65°C is allowed. It has a typical turn-on time of 80 μs, a turn-off time of 25 μs, and a typical di/dt of 70A/μs.

The working principle of a Thyristors – SCR is very simple. When a positive voltage is applied to the gate, it will turn on the SCR. This will cause a low-resistance path to be created across the anode and cathode, allowing current to flow through it. The SCR will continue to stay in its on-state until the current is reduced below the holding current, at which point the SCR will turn off. The S4055WTP can also be turned off manually by applying a negative voltage to the gate.

The S4055WTP is a versatile thyristor designed to meet the most demanding applications requiring surge current protection or low-reverse voltage holding. It offers a great solution to problems related to safety, cost-effectiveness and robustness. It is widely used in various applications such as industrial motor control, power switching, and overvoltage protection.

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