2N1798

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Thyristors, aka Silicon Controlled Rectifiers (SCRs), are devices used for controlling large amounts of electrical power. The 2N1798 is a type of SCR, and as such has some special properties and applications. In this article, we’ll discuss the application field and working principle of the 2N1798 SCR.

Application Field

The 2N1798 is typically used in controlling power in automotive, industrial, and consumer electronic applications. As an example, it can be used in controlling the power of electric motors, or in lighting and LED applications. It can be used as a switch, a timer, or even a voltage regulator. Because of its high voltage and low on-state resistance, it’s well-suited for applications requiring large amounts of power.

It’s capable of controlling both AC and DC currents, making it suitable for a wide range of applications. Additionally, it offers a fast switching speed, which makes it an ideal choice for timing and power control applications.

The 2N1798 also offers great durability, as it’s capable of operating at high temperature and very low voltage. This makes it an ideal choice for industrial applications, such as in welding machines, induction heating equipment, and other high-power devices.

Working Principle

The 2N1798 SCR is a three-layer PNPN (positive-negative-positive-negative) semiconductor device. It consists of three terminals: the gate, anode, and cathode. The gate acts as the control terminal, and when the gate voltage is raised above a certain voltage (the trigger voltage) then the device becomes “conducting”, that is to say it will allow current to flow through it.

In most applications, when the gate voltage exceeds the trigger voltage, a large surge of current will flow through the SCR, essentially turning it on. Once the current drops below a certain level, the device will “turn off” and the current will be cut off.

The current control of the device is what makes it so useful in applications such as motor driver, power controllers, timers, and other high-power circuits. With the proper combination of components and circuitry, one can control the amount of current that passes through the SCR, allowing for precise control of a device.

The 2N1798 is an incredibly versatile device, and it has a wide range of applications in both industrial and consumer electronic applications. Its high voltage and low on-state resistance make it an ideal choice for controlling large amounts of power, while its fast switching speed makes it a great choice for timing and power control applications.

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