VS-25TTS12S-M3

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Thyristors - SCRs

A Silicon Controlled Rectifier (SCR) or Thyristor is a three-terminal semiconductor device consisting of a p–n–p–n structure. The device is controlled with a gate signal: when the gate signal is off, the SCR blocks the current flowing in the circuit; when the gate signal is on, the SCR acts as a switch that allows current to flow. SCRs are widely used in applications such as potentiometers, light dimmers, timer circuits, power supplies, ignition circuits, motor control and electric bell circuits.

VS-25TTS12S-M3 application field and working principle

The VS-25TTS12S-M3 is a medium-power SCR manufactured by NEXCOM. It is designed to be used in applications where a rectangular current waveform is required, such as in motor control, switch mode power supplies, lighting control and industrial equipment. It features a blocking voltage of 600V, a zero voltage turn-on current of 3mA and a maximum diode forward drop of 1.5V.

The VS-25TTS12S-M3 works by controlling the bias voltage applied to the gate terminal. When a negative gate voltage is applied, the junction between the p–n–p–n device is forward biased resulting in a low blocking voltage. This allows the current to flow from the anode (A) to the cathode (K) when the voltage across the device exceeds the blocking voltage. When the gate voltage is switched off, the junction becomes reverse biased, blocking the current flow.

The device has a positive temperature coefficient, meaning that as the temperature increases, the current flowing through the device decreases. This is an important feature, as it ensures the device does not become over-energized, resulting in damage to the device. The device also has an operating temperature range of -20°C to +85°C.

The VS-25TTS12S-M3 is a good choice for motor control circuits, as its fast switching speed and low turn-on current make it an efficient device for controlling motor speed and direction. It is also an effective device for switch-mode power supplies, as its low turn-on current and fast switching speed can create a rectified output waveform with minimal power loss.

In lighting control applications, the device can be used to maintain the brightness of both incandescent and LED lamps. The device’s fast switching speed and low turn-on current make it an ideal device for regulating the current flow and brightness of LED lamps. Additionally, its positive temperature coefficient ensures that the LED lamp does not become over-energized.

Overall, the VS-25TTS12S-M3 is an ideal solution for applications requiring a fast, efficient and reliable semiconductor device. Its fast switching speed, low turn-on current and wide temperature range make it a good choice for a variety of applications.

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