BCR16FR-12LB#BH0

Thyristors - TRIACs

TRIACs, or Triode for Alternating Current, are three-terminal, silicon-controlled rectifiers used to control and switch AC currents. They are made up of two opposing thyristors connected side-by-side and sharing a common gate terminal. This type of thyristor is electrically bidirectional and can be used to break or make an AC circuit in both cycles of an alternating current. This unique property provides a great advantage compared to conventional SCRs (Silicon Controlled Rectifiers) as it can be used to control both positive and negative phases of an AC current. The BCR16FR-12LB#BH0 TRIAC is a low-power high-performance device that has a wide range of applications and can operate at a voltage of up to 500 volts.

BCR16FR-12LB#BH0 Application Field

The BCR16FR-12LB#BH0 has a wide range of applications. It can be used in a variety of industrial and domestic uses, including motor speed and temperature control, lighting dimmers, TV/VCR environmental and lighting controls, AC power control, and applications involving AC output from integrated circuits. The device can also be used in radio frequency applications such as AM and FM radio and TV remote controls. The low power device is ideal for small, portable devices such as cell phones, PDAs and other portable electronics that require minimal power.

BCR16FR-12LB#BH0 Working Principle

The BCR16FR-12LB#BH0 TRIAC operates on the principle of conduction by positive and negative descent of current. It is controlled by a positive gate-to-cathode voltage applied to the gate terminal. When sufficient gate current is applied to the device, the gate-to-cathode voltage causes the TRIAC to break down and allow current to flow through it. As the current ascends, a positive current transfers upon the main terminals A1,A2,B1 and B2. When the positive current reaches its peak, the internal voltage of the device decreases and the TRIAC remains conductive. This is the key property of the TRIAC which permits conduction to start through the device in both the positive and the negative direction.

The device is also designed to sustain a regenerative gate current which quickly reapplies the gate-to-cathode voltage, thus maintaining the device in the conductive state. The BCR16FR-12LB#BH0 can also be used in a zero-crossing mode, where it switches on exactly at a zero-crossing of the alternating current waveform. In this mode, the device is used to reduce the mains power disturbances by activating power control devices such as lighting dimmers and motor controls.

Conclusion

The BCR16FR-12LB#BH0 TRIAC is a high-performance device that offers a wide range of applications. It is suitable for use in portable electronics and other applications involving switching of AC circuits. The device is cheaper and more reliable compared to conventional SCRs and is ideal for use in applications that require minimal power. The device is also designed to maintain a regenerative gate current, thus increasing its reliability and making it suitable for applications where precise control is required.