TDK4303302DH

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Thyristors - SCRs

A thyristor, also known as a silicon controlled rectifier (SCR), is a three-terminal power semiconductor device. It is a solid-state piece of electronics with three leads, a cathode, an anode, and a gate. It finds application in controlling current flow, over-current protection, voltage regulation, power factor correction, motor speed control etc.

TDK4303302DH is a general purpose thyristor. It is an IGBT-packed catalog-type product suitable for various motor-drive and lighting applications. It has a wide on-state current range and is designed to survive surge voltages as high as 630 Volt. The maximum repetitive off-state voltage it can handle is 1600 Volt.

Application Field

TDK4303302DH is mainly used in high-voltage, large ampere, bidirectional current motor control technology. It can also be used in the field of power transmission, household appliances, industrial automation and industrial controlling. It can be used for high-power current control for inductive loads, LED lighting, AC motors, elevator controllers, and power supply supplies etc.

Working Principle

A thyristor is a three-terminal device comprised of a gate, an anode, and a cathode. When the voltage applied between its anode and cathode exceeds a predetermined ‘breakover’ voltage, current flows from the cathode to the anode. The flow of current through the device is then dependent upon the current that is fed to the gate. If the gate current is removed, the device turns off. The main advantage of a thyristor is its ability to control large amounts of current.

When there is no voltage applied between anode and cathode, the device is in the off-state. The amount of current flowing through the SCR is practically zero, and the voltage across the device is the same as applied. When the voltage is increased to a certain level and the voltage across the device exceeds a certain firing voltage, called the breakover or firing voltage, the thyristor begins to conduct. This breakover voltage is dependent on the gate current. Once the breakover voltage is reached, an avalanche like process occurs, and the device “fires”, passing current from the anode to the cathode. The amount of current passing depends on the voltage Applied, gate current, and temperature.

TDK4303302DH allows current to flow in either direction (Bi-Directional), and the device does not need current to fire, making it particularly suitable for applications with low gate input power, such as Inductive Loads, LED Lighting, AC Motors, etc.

TDK4303302DH is a power control device that can be used to regulate, protect, and switch high currents and voltages. It is designed to be a cost effective, low on-state power device, and it is suitable for various motor-drive and lighting applications.

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