VS-ST1000C18K1

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Thyristors are semiconductor power devices that are primarily used to switch large amounts of electrical power when triggered. One of the helpful devices in this category is the VS-ST1000C18K1. This device is a phase control thyristor (thyristor SCR), a three-terminal semiconductor power switch that is used for AC power control, particularly for phase control. The device has a three-terminal construction, which consists of an anode, a cathode, and a gate. The gate functions as the control terminal. This device is used to control the flow of power by providing an off-state until a trigger is applied to the gate terminal. The voltage across the device must reach the specified anode-to-cathode forward breakover voltage before conduction will occur.

The VS-ST1000C18K1 is designed as a standard off-state thyristor and has a maximum power dissipation of 1000 W @ 25°C and a maximum on-state current of 18 A. This thyristor operates at a peakITM of 1.27 kA @ Tj=30°C, with a holding current, IH, of 800 mA. The construction of the device consists of a dielectric base, a gate oxide and a passivation layer.

The working principle of the device is simple. When a control signal, such as a gate firing signal, is applied to the gate terminal, the gate oxide breaks down, allowing electrons to flow through the anode-cathode junction. This causes an electric current to start flowing from the anode to the cathode, switching the device on. The conduction through the device is maintained until the anode-cathode voltage reaches the “hold-off voltage” or the “gate triggering voltage”. When either of these values is reached, the current flow is interrupted, and the device goes into the off-state.

The VS-ST1000C18K1 is mainly used for motor drives and various AC power control applications. In motor drives, thyristors are used to start and stop motors, as well as to vary the speed of the motor. This device can also be used in applications that require controlling and protecting voltage levels, such as in transformers, motor generators, and industrial machines. It can also be used in applications such as solid state lighting, welding machines, audio amplifiers, and medical equipment.

Due to its reliable operation, high current capacity, and simple triggering, the VS-ST1000C18K1 is a highly useful and versatile device. It is a reliable, cost-effective solution for controlling and protecting AC equipment, power supplies, and other electrical equipment.

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