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Thyristors - TRIACs

QK016LH6 is a TRIAC (Triode Alternating Current) device, a bidirectional power switch that can conduct current in both directions when triggered. It is a type of thyristor and it consists of a pair of mutually triggered three terminals. The terminals, designated as "MT1" (Main Terminal 1) and "MT2" (Main Terminal 2) are the main current carrying terminals while the other terminal (Gate) is used to control the device.

Application Field

QK016LH6 devices are commonly used in applications where the need to switch large amounts of AC current is necessary. Common applications include controlling AC power to motors, dimmers, light switches, air conditioning systems, and laser power supplies. Due to their ability to quickly switch currents, TRIACs are also used in power circuits for remote control systems, such as in remote car starters.

Working Principle

The working principle of a QK016LH6 is based on the principle of electrical gating. The Gate terminal is used to control the switching of the device by providing an external current to the Gate terminal. When a certain trip or threshold current is provided to the Gate terminal, the transmission of current across the two main terminals is enabled. This in turn allows current to be conducted through the device and the AC load.

The QK016LH6 device also contains a built in protection mechanism that ensures that the device does not remain in an on-state for more than a specific amount of time. This is a useful safety feature as it helps to prevent catastrophic failures in case of circuit malfunction or incorrect programming of the device. The device will switch off after the predetermined time period and reset to the off-state.

In addition to its basic switching functionality, a QK016LH6 can also be used in more advanced applications. As an example, the device can be configured to provide different levels of current control, allowing the user to precisely control the amount of current flowing through the device. This makes the device ideal for controlling the intensity of lighting, heating, or cooling systems.

Conclusion

The QK016LH6 is a type of TRIAC that is often used in applications where the need to control large amounts of AC current is required. The device consists of two main terminals, MT1 and MT2, while the Gate terminal can be used to control the switching of the device. The device is also built with safety features that protect it from staying on for too long and can be used in more advanced applications like providing precise current control.

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