VS-2N687

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Thyristors - SCRs are a type of four-layered semiconductor device consisting of three PN junction terminals, referred to as the anode, gate and cathode. The term SCRs stands for silicon-controlled rectifier and describes a special type of thyristors capable of carrying high currents in one direction and switching relatively large voltage spikes. The SCR is commonly used as a switch in high voltage and power systems, as well as in a wide variety of industrial and consumer electronics applications.

VS-2N687 is a type of SCR device developed by Vishay Intertechnology and is primarily used for high current, industrial applications. The VS-2N687 delivers high performance when used as a DC power switch controlling up to 600 volts and 2 amps of current. This SCR is particularly noted for its impressive efficiency, with Gate Current (I_g(TO)) ratings of only 6 mA, which is ideal for low current applications. Additionally, the VS-2N687’s Gate Threshold Voltage (V_gt) ratings of between 6 to 8 volts is also typically very desirable for DC power switching and motor drive applications.

In terms of its working principle, the VS-2N687 SCR is driven by providing a small current and pulse to the Gate terminal. This activates the SCR and causes a larger current to flow between the Anode and Cathode terminals. The SCR is designed to remain on as long as current flows between the Anode and Cathode, even after the Gate current has been removed. The device will remain in the on state until the end of the current pulse, or until the voltage has been removed. Once the pulse has ended, the SCR can be deactivated by applying a small reverse current to the Gate terminal.

The VS-2N687 is also well suited for use in relay, timer, and voltage reduction applications, as it can withstand a maximum reverse blocking voltage of up to 600 volts. This means it can be used to precisely control the input voltage to any application, with the SCR acting as a switch to open and close the circuit as needed. The VS-2N687 also features high surge capability and a low on-state voltage drop, thanks to its optimized package design.

Due to its small size and high-performance characteristics, the VS-2N687 is an ideal solution for many large current industrial and consumer applications. This makes it a versatile SCR and a great choice for many power switching and motor drive solutions.

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