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Thyristors - TRIACs

Thyristors and TRIACs, both of which are semiconductor devices, have been in high demand in the world of electrical engineering over the past few decades. The BCR4CM-16LH-1#BH0, a switching device represented by a TRIAC, is among them. This article will discuss the application field and working principle of the BCR4CM-16LH-1#BH0 device.

Application Field

The BCR4CM-16LH-1#BH0 TRIAC is designed for industrial applications. It has a wide range of applications, which include power supply systems, electrical motor speed control systems, industrial electric heaters, solenoid actuators, lighting systems and so on. It is also used in switching power supplies and static power converters. Some other potential applications are electric welding machines, soft starters and EDM machines.

It is a low-cost, low-power sourcing device, with a high switching frequency of up to 100 kHz. As such, it is suitable for low-power motor control applications, such as those in household appliances, air conditioners, precision control equipment and office equipment.

Working Principle

A TRIAC is a three-terminal, bidirectional switch. It goes from an off state to an on state by passing an electric current through it. This current must exceed a certain threshold, usually known as the gate current. Once the current passes through the device and the gate current is reached, the TRIAC turns on and the electric current that is passing through the device remains stable. This is known as the on state. To turn the device off, the current must be reversed.

This gate current can be controlled by adjusting the gate voltage of the device. This can be done by using a potential divider or by adding a gate resistor. As the gate voltage increases, the gate current also increases, leading to an increase in the current flow in the TRIAC.

BCR4CM-16LH-1#BH0 TRIACs are bidirectional switches, thus they are capable of controlling the current flow in both directions. This is an advantage over MOSFETs, which are unidirectional. This makes them suitable for use in applications such as AC motor control, where the direction of the current needs to be switched.

Apart from controlling the current through a circuit, BCR4CM-16LH-1#BH0 TRIACs can also be used as protection devices. They can be used to protect circuits from overcurrent, overvoltage and voltage spikes. Furthermore, they are capable of controlling the inrush current in circuits.

Conclusion

The BCR4CM-16LH-1#BH0 TRIAC is a low-cost, low-power sourcing device, with a high switching frequency of up to 100 kHz, making it suitable for industrial applications such as power supply systems, electric motor speed control systems, industrial electric heaters, solenoid actuators, lighting systems, switching power supplies and static power converters. The device can be switched in both directions with the help of its three-terminal structure and can be controlled by adjusting the gate voltage. Additionally, the device can be used as a protection device, capable of protecting circuits from overcurrent, overvoltage and voltage spikes.

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