Q4004R3

Series:	--
Packaging:	Bulk
Part Status:	Discontinued at Digi-Key
Triac Type:	Logic - Sensitive Gate
Voltage - Off State:	400V
Current - On State (It (RMS)) (Max):	4A
Voltage - Gate Trigger (Vgt) (Max):	1.3V
Current - Non Rep. Surge 50, 60Hz (Itsm):	46A, 55A
Current - Gate Trigger (Igt) (Max):	10mA
Current - Hold (Ih) (Max):	20mA
Configuration:	Single
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-220-3
Supplier Device Package:	TO-220 Non-Isolated Tab

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Thyristors - TRIACs

Q4004R3 Application Field and Working Principle

TRIACs are a type of thyristor designed to control the current with both AC and DC power sources. The Q4004R3 in particular is a medium power TRIAC which is primarily used in applications such as motor speed regulation, light dimming, and most notably in household and industrial heating. This TRIAC is suitable for use in low to medium voltage applications, and the nominal current rating is 4A at 400V. It is also able to handle non-inductive loads, capacitive loads, and application with very low frequencies such as in a sine wave.The working principle of the Q4004R3 is quite simple. It operates like a switch, without conducting current until a certain road or voltage is applied. The voltage is what turns the TRIAC on and supplies the load with sufficient power to operate. Once the load has been supplied with input voltage, the TRIAC acts like a two-way variable resistor and allows the current flow to be controlled. By adjusting the gate current, the power between the two electrodes can be adjusted, thus controlling the load with just the one device. The advantage of the Q4004R3 is that it offers multiple voltage triggering levels, meaning that the user can adjust the triggering voltage to the desired level. This is most useful for applications where the user wants to limit the amount of power that the load can receive. The device also offers advanced heat dissipation to prevent it from overheating, and an increased power rating that allows the Q4004R3 to handle high current applications. Overall, the Q4004R3 is an ideal choice for medium power applications where adjustable voltage and power are needed. It offers a robust solution that has been designed to handle both AC and DC power sources, and most importantly offers the user the ability to control the output power to the desired level.

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