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Thyristors - TRIACs

QK008NH4TP Application Field and Working Principle

QK008NH4TP is a three-terminal thyristor (TRIAC). It is designed to be used in the applications that are suitable for high power and high thermal dissipation. The main application field of QK008NH4TP is in aviation, and is mostly used for power triggering and light dimming.

The QK008NH4TP uses a triac as its main active part and two resistors for current limiting protection, which reduces the cost and improves the reliability of the device. It has a high dielectric strength, insulation resistance and a low leakage current. It is also suitable for use with a wide range of medium voltage AC power sources.

The QK008NH4TP has an open loop control circuit, which means that it can be operated with a low power signal and still maintain accurate control with respect to the AC power source. The device has two independent gates; one to control the device on and one to control it off. The gates operate in parallel and must both be enabled in order for the device to be turned on. When both gates are enabled, the device will be turned off.

The working principle of the QK008NH4TP is simple. The two gates are operated in parallel and are connected to a high-power AC power source. When the signal is applied to both gates, an electric field is generated between them; this field causes the device to become conductive and turn on. Once the device is on, it can be turned off by either increasing or decreasing the signal applied to the gates.

The QK008NH4TP is a versatile device, offering high power and low switching losses. It is ideal for use in applications where a high power is needed. It is also suitable for light dimming, allowing for accurate light intensity control. The device also offers good thermal dissipation and is highly reliable.

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