C398PB

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Thyristors - SCRs

A silicon controlled rectifier (SCR) is a thyristor device that is often used for controlling power in electronic circuits. The C398PB is a Planar Rectification type of device and is one of the commonly used power components in applications where a high-power electrical connection is needed for controlling large currents over a range of voltages. It is an SCR with four power terminals, consisting of an anode, cathode, and two gate connections. A major advantage of the C398PB is its low-level gate trigger voltage requirements as compared to other SCRs.

Application Field of C398PB

The C398PB is used in various electrical and electronic applications, such as industrial motor drives, solar panels, and healthcare equipment. Domestic builds of items such as air conditioners, water heaters, and refrigerators often employ the use of a silicon controlled rectifier to control current flow. Furthermore, the C398PB can also be used in a range of AC and DC motor control applications, as well as in battery chargers and solar power systems.

Working Principle of C398PB

The working principle of the C398PB involves the role of the four main terminals, namely the anode, cathode, and two gate connections. The function of the anode is to allow current to flow through the SCR. The cathode, on the other hand, is the terminal towards which the current is drawn from the anode. The gate terminal is responsible for controlling the current flow through switching the device on and off. The gate is connected to the anode and is not directly connected to the cathode; this means that the device cannot be triggered until a control voltage is applied between the gate and cathode.

The working voltage of the C398PB is between 800V AC/DC and 1200V AC/DC and the on-state current should not exceed 1,500A. Once the control voltage reaches the levels required, the anode voltage causes conduction to occur between the cathode and anode. The device turns off when the current reaches the current-threshold level or when the control voltage supplied is removed or lowered below the turn-off threshold voltage.

Power Handling Characteristics

The C398PB is capable of handling currents ranging from 50A to 1500A, which is much higher as compared to related SRC devices. The voltage breakdown rating of the SCR is not affected considering the current rating; this means that it can handle a high-power amperage and still remain efficiently operational. It also boasts an average forward current (at 25 degree) and peak reverse current of 1,500A and 2,000A respectively.

Advantages of C398PB

The C398PB has a number of advantages over other SCRs. First and foremost, it is capable of handling very high currents of up to 1500A, which is essential for the motors and machines in the industries. Secondly, it has a fast turn-on and turn-off time, which reduces the switching transients. Thirdly, it is a robust and reliable device, which does not produce thermal runaway current, which is important as it prevents from any potential damage to the circuit. Finally, it also possess a low-level gate trigger voltage requirement and hence, can be used even in circuits with weak gate drivers.

The C398PB is a device that has numerous applications in various fields of electrical and electronics engineering. It is a cost effective device that offers reliable operation and is capable of handling high currents. Furthermore, its low gate trigger requirement makes it suitable to be used even in weak gate systems.

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