Q4004F321

Series:	--
Packaging:	Bulk
Part Status:	Obsolete
Triac Type:	Logic - Sensitive Gate
Voltage - Off State:	400V
Current - On State (It (RMS)) (Max):	4A
Voltage - Gate Trigger (Vgt) (Max):	2V
Current - Non Rep. Surge 50, 60Hz (Itsm):	46A, 55A
Current - Gate Trigger (Igt) (Max):	10mA
Current - Hold (Ih) (Max):	20mA
Configuration:	Single
Operating Temperature:	--
Mounting Type:	Through Hole
Package / Case:	TO-202 Long Tab
Supplier Device Package:	TO-202

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Thyristors - TRIACs TRIACs are three-terminal semiconductor devices that are used for switching or amplifying signals in electronic circuits. They are made of three terminals: an anode, cathode and the main gate terminal. Since it is a unidirectional device, it can control the flow of electricity in one direction only. When a voltage is applied between the anode and main gate, the main gate acts as a path for the electrons to flow from the anode to the cathode. This is known as "switching on" the TRIAC.The Q4004F321 TRIAC is a four amp, 400 volt TRIAC with a trigger current of 10 mA, making it the highest quality TRIAC in its range. It is designed to replace the traditional two amp, 200 volt TRIACs in most projects. It has fast switching response, excellent standby and dynamic performance, low trigger losses, low on-state voltage drop and low total power dissipation. The Q4004F321 is specially designed for applications that require high current ratings and fast switching capabilities. One of the most common applications of the Q4004F321 TRIAC is the control of lamps, motors and other AC appliances. In such applications, the TRIAC is connected to the AC power supply and the main gate terminal is connected to a circuit that can trigger it to switch on and off at a particular voltage. When a voltage of 10 mA is applied to the main gate terminal, the TRIAC switches on and the current flow is allowed to run through the lamp, motor or other AC appliance. When the trigger current is removed, the current flow stops, effectively switching off the device. Another application of the Q4004F321 TRIAC is in connecting two AC signals with different phases. Connecting the anode of one signal to the main gate of the TRIAC and then connecting the cathode of the other signal to the anode of the TRIAC allows the TRIAC to act as a bridge between the two signals. The TRIAC then allows current to flow between the two signals in a single direction. Finally, the Q4004F321 TRIAC can also be used as an amplifier to amplify weak AC signals. The TRIAC can be connected to the power supply with the main gate terminal, while the anode and cathode terminals are connected to the weak input signal. The TRIAC will then respond to the weak signal by switching on and allowing the current flow through the TRIAC at the same level. This will effectively amplify the signal, allowing for easier processing or control. Overall, the Q4004F321 TRIAC is a powerful and reliable device for controlling AC appliances, connecting two AC signals with different phases, and amplifying weak AC signals. It has a high current rating and fast switching response, making it suitable for a variety of applications. As such, it is clearly an important device for any electronic engineer.

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