Q4012LH2

Series:	--
Packaging:	Bulk
Part Status:	Discontinued at Digi-Key
Triac Type:	Alternistor - Snubberless
Voltage - Off State:	400V
Current - On State (It (RMS)) (Max):	12A
Voltage - Gate Trigger (Vgt) (Max):	1.3V
Current - Non Rep. Surge 50, 60Hz (Itsm):	110A, 120A
Current - Gate Trigger (Igt) (Max):	10mA
Current - Hold (Ih) (Max):	15mA
Configuration:	Single
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3 Isolated Tab
Supplier Device Package:	TO-220 Isolated Tab

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The Working Principle and Applications of TRIAC Q4012LH2The TRIAC Q4012LH2 is a type of semiconductor device that belongs to a class of thyristors known as TRIACs or triode for alternating current. It is a three-terminal device made up of two PN-junction thyristors that are connected in parallel with an internal gate. The TRIAC Q4012LH2 can be used to switch, regulate and control both AC and DC currents. It functions as an electronic switch that can be used to control AC power and switch between different voltages.In operation, the TRIAC Q4012LH2 is triggered by applying a small current at the gate while an AC signal is applied to the main terminals. When the signal applied to the main terminals reaches a predefined level, the TRIAC Q4012LH2 will switch on, allowing the current to flow through it. The signal input to the gate can be a DC voltage or AC voltage depending on the configuration. Once the signal is applied, the current flows through the TRIAC Q4012LH2 until the current reaches the blocking state regardless of its initial signal. Turning the signal off will cause the TRIAC Q4012LH2 to become non-conductive. This feature makes it ideal for controlling and switching AC power.The TRIAC Q4012LH2 has several applications in various industries. It is commonly used for controlling and regulating the power of various AC or DC motors, solenoids, transformers and relays. It is also used in lamp dimming and light intensity control, SCRs and stepper motor control, and electronic hall effect switching. In audio equipment, the TRIAC Q4012LH2 can be used as a volume controlling device by providing a gate signal to regulate the audio signal’s amplitude. Additionally, it is used in power factor correction and power switching applications.Moreover, the TRIAC Q4012LH2 is also used in household AC motor control circuits and devices such as air conditioners, ranges, ovens and refrigerators. The device is also used in various medical applications such as X-ray machines and MRI scanners. It is also used in various aquariums and water pumps, washing machines and dryers.The TRIAC Q4012LH2 is a cost-effective solution for controlling and switching electrically powered devices. It is a highly reliable device that is capable of providing high current density with relatively low losses. Its high switching frequency and easy control make it a suitable choice for use in home electronics and appliances.

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