QK016LH4

Series:	--
Packaging:	Bulk
Part Status:	Discontinued at Digi-Key
Triac Type:	Alternistor - Snubberless
Voltage - Off State:	1kV
Current - On State (It (RMS)) (Max):	16A
Voltage - Gate Trigger (Vgt) (Max):	1.3V
Current - Non Rep. Surge 50, 60Hz (Itsm):	167A, 200A
Current - Gate Trigger (Igt) (Max):	35mA
Current - Hold (Ih) (Max):	50mA
Configuration:	Single
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3 Isolated Tab
Supplier Device Package:	TO-220AB

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Thyristors - TRIACs

Thyristors, also known as TRIACs, are three-terminal solid-state chips that act as operators that can be used to electronically control high current loads. The application of these devices extends to a wide range of industries, including telecommunications, automotive, medical, renewable energy, and industrial automation. The name TRIAC stands for Triode Aplifier with Control, and the device works by controlling the current in two directions.When two-directional control is required for an electrical signal, then the TRIAC can be used in place of two separate switches. This eliminates the need for two separate controls and simplifies the system design. A TRIAC\'s three terminals are the gate, anode, and cathode. When a voltage appears at the gate, it will open or close the TRIAC by directly controlling the current flow between the two other terminals.The QK016LH4 is a 4A 400V TRIAC. It can be used to control current in two directions and comes with a 150mA holding current and 6V gate trigger voltage. It is designed to switch high power AC loads, making it perfect for applications such as motor and light control. This is just one example of the many types of TRIACs available in the market.The construction of a TRIAC is quite simple. It is a four-layer device with a PNP and NPN transistor in the outer layers and two junctions at the centre. Triac devices have a gate, which, when triggered by a voltage, allows current to flow between the two other terminals, i.e., the anode and cathode. The gate is activated by a voltage which then turns the TRIAC ‘on’ and establishes a current carrying path between the two terminals.When the gate voltage is removed, the TRIAC turns ‘off’ and the current flow is immediately halted. The current passes from the anode to the cathode and can be powered in both directions, making the TRIAC especially useful for AC circuits.The applications for TRIACs are limitless. Many consumer electronics, such as dimmer switches, use TRIACs to control the brightness of a light. As the brightness of the light increases, the TRIAC increases the current flow, which in turn increases the light intensity. TRIACs can also be used in AC motor speed control, heating and cooling systems, and medical and industrial automation.The QK016LH4 is an example of a common TRIAC found in the market. It is designed to switch high power AC loads, making it suitable for a wide range of applications. In addition, its 150mA holding current and 6V gate trigger voltage make it easy to use.In conclusion, TRIACs are versatile devices that can be used for a variety of applications. The QK016LH4 is a good example of how TRIACs can be used to switch high power AC loads. Its ease of use and wide range of features make it the ideal device for many applications.

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