K0900G

Thyristors - DIACs, SIDACs in K0900G Application Field and Working Principle Overview

Thyristors are solid-state switches that are specifically designed to control the amount of current in an AC or DC circuit. They are commonly used in industrial and commercial applications, such as controlling motors, dimming lights, and regulating power converters. The three main types of thyristors are DIACs, SIDACs, and TRIACs.

DIACs

The DIAC is an acronym for a diode-controlled ac switch and is commonly referred to as a diode-triac or diac switch. A DIAC is a four-layer semiconductor device that is designed to switch on and off an AC current when it is used as a trigger for a thyristor. DIACs are used to control AC electricity in circuits that are continuously operating, such as power supplies and motor controllers.

SIDACs

The SIDAC, or static induction diode, is a two-step AC switch constructed similarly to the DIAC and TRIAC. A static induction diode is an electronically controlled switch that can alternate between on and off states with voltage. The switch can remain in either state until the applied voltage exceeds a predetermined breakover voltage, at which point it triggers an alternative state. SIDACs are used in applications that involve controlling AC power with a combination of switching states.

K0900G Application Field and Working Principle

K0900G is a thyristor based power limit switch designed for single-phase power supply systems of up to 500V and is used for the purpose of preventing overloading on the system. The K0900G is able to detect over-current and disconnect the power supply line with a fast response time of less than 20 milliseconds. The K0900G utilizes a combination of either a DIAC or SIDAC and a TRIAC to control the power supply.

The DIAC or SIDAC acts as a voltage sensor, detecting the current on the line and triggering a change in the TRIAC’s behavior. The TRIAC, in turn, acts as a switch, either allowing or stopping current from flowing through the power line depending on the DIAC or SIDAC\'s signal. When the line voltage exceeds the rated current, the DIAC or SIDAC trips and the TRIAC shuts off the current. The action of the K0900G is fast enough that the power supply is prevented from overloading.

The K0900G is a reliable and dependable device that can be used in many different applications, such as residential, industrial, and commercial. It is one of the most commonly used power limit switches in the market today and is suitable for a wide range of applications. From controlling LED lights to preventing overload in manufacturing facilities, the K0900 is an invaluable and essential component of any electrical system.