VSKH500-16

Thyristors are a kind of switching device which, unlike transistors, does not need a continuous current to turn the device on. This makes thyristors more suitable for rapid switching applications, such as controlling high-powered loads or providing fast electrical protection. SCRs (silicon-controlled rectifiers) are a special type of thyristor that can be triggered and turned on using an external current.

VSKH500-16 is a four-quadrant high-power semiconductor module that uses SCRs to switch currents up to 1kA. It is manufactured by Avelle Semiconductor, a subsidiary of the Japanese electronics giant Mitsubishi. The module consists of three main components: four main SCRs, an auxiliary thyristor and an isolation relay.

Application Field

VSKH500-16 is designed for a wide range of applications, including motor control, power conversion and uninterruptible power supply systems. It is used in conjunction with electricity meters, railway signal systems, welding machines, electric furnaces, lighting systems, frequency inverters and other power-hungry industrial devices.

Working Principle

VSKH500-16 works by switching the current flow through the SCRs in the module. When electric current is applied to the gate terminals of the SCRs, a voltage drop is created between the anode and cathode, allowing current to flow through the SCRs. The auxiliary thyristor is then used to control the gate voltage of the SCRs, allowing the current to be turned on and off quickly. The module is protected from overloads and short-circuits using an isolation relay, which will break the current circuit in the event of a fault.

In addition to providing fast switching, VSKH500-16 also offers excellent thermal performance, thanks to its specially designed thermal management system. The module is designed to dissipate heat quickly, ensuring that excess heat is not generated even when the module is operating at its maximum power. This helps to extend the life of the devices, as well as providing protection against thermal overloads.

VSKH500-16 is suitable for use in a wide range of industrial applications that require fast and reliable power switching. Its efficient thermal management system ensures that the module remains cool under heavy load, providing a long life and reliable operation. The module also offers excellent protection against overloads and short-circuits, making it an ideal choice for use in a variety of demanding applications.