Q6025R667

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Thyristors - TRIACs

Triggered or unidirectional thyristors (also known as Silicon-controlled Rectifier or SCR) are widely used for controlling large power in AC and DC circuits, mainly due to their fast switching and steady triggering performance. But when switches are needed for controlling both directions of current in an AC circuit, then a three terminal, bidirectional device is required and this is known as a Triac, which stands for TRIple AC switch.

A Triac is actually a pair of unidirectional thyristors connected in inverse so that the gate-triggering control signal can be applied across both of them. Q6025R667 is the part number for the 6A/200V Triac produced by the Nihon Inter Electronics Corporation. It comes in a single package with two terminals for connecting to the mains and one gate terminal for signal control.

Application Field of Q6025R667

The major application of the Q6025R667 Triac is in controlling power being supplied to a mains outlet such as a standard wall outlet or light switch. It amplifies the signal from the wall or controller switch, providing fast switching at low power, and is capable of handling both the AC phase and the neutral connection of a typical mains outlet. This is an ideal product for applications such as powerstrip protection, overvoltage and overcurrent protection, and surge protection.

Since the Q6025R667 is bidirectional, it is also used in bi-stable and reed sensing circuits since it offers excellent capacitive load handling and fast switching times. This is ideal for many power supply applications and also in applications such as motor control, temperature control and light dimming.

Working Principle of Q6025R667

The Q6025R667 takes input from the wall outlet or from a controller switch and amplifies the signal by providing an amplified current gain of up to 6A. This allows for fast switching of the AC current without needing the use of larger power components. The device can handle both the AC supply and the neutral connection for mains outlets, so it is capable of controlling both directions of current flow in AC systems. This is done by using two unidirectional thyristors in an inverse configuration and using a gate signal to control the flow of current.

The Q6025R667 has a very high switching speed and is designed to be very robust and reliable. It can operate over a wide temperature range and can handle up to 6A of load on the mains. It has very low drop off voltage and low on-state voltage, which makes it ideal for applications such as powerstrips and surge protection.

Conclusion

The Q6025R667 is a reliable and high performance TRIAC produced by Nihon Inter Electronics. It is suitable for many mains power control and bi-stable control applications due to its bidirectional nature and its fast switching capabilities. The device has excellent capacitive load handling, low drop off voltage and low on-state voltage, which make it an ideal product for many power supply applications.

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