F1857HD400 Discrete Semiconductor Products

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Thyristors - SCRs - Modules

Thyristors (SCRs) are a type of semiconductor used as an electronic switch. They are used in a variety of applications, such as power supplies, motor control, and lighting control. Modules are a type of SCR that are configured in a single package and contain several components, such as resistors, transistors, and diodes. The F1857HD400 is a module and is designed for use in a wide range of applications, including motor control, lighting control, and rectifier circuits.

The F1857HD400 is a four pin module. Pin 1 is the cathode, which is the negative pin. Pin 2 is the anode, which is the positive pin. Pin 3 is the gate, which is the control for the SCR. Pin 4 is the auxiliary, which is the common fault signal. The pins are arranged in the opposite direction to the typical SCR, so the pin assignments are backwards. The module has a trigger current of 40mA and a holding current of 10mA.

The working principle of the F1857HD400 is as follows. When the gate voltage is 0V, the SCR is off. When the gate voltage is greater than the SCR\'s threshold voltage, the SCR is on. When the anode voltage is more positive than the cathode voltage, current flows through the SCR and the device is on. When the anode voltage is less than the cathode voltage, the device is off. The F1857HD400 can be used in rectifier circuits because it can switch on quickly when the anode voltage is negative. The module can also be used in motor control and lighting control, as it can quickly switch on and off in response to the applied voltage.

The F1857HD400 is mainly used in motor control and lighting control applications. It can be used to control the speed and direction of motors, as well as the intensity and duration of lights. The module can be used in AC or DC circuits, as it can be triggered by either AC or DC voltages. It can also be used to create a wide range of timing, such as pulse width modulation.

The F1857HD400 is a versatile device that can be used in a variety of applications. It is designed to provide reliable and efficient switching, and is suitable for use in a wide range of circuits. The module is easy to install and can be operated in a variety of voltages.

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