L4004L6

Introduction

The L4004L6 is a 4-terminal power thyristor device in a Hermetically sealed TO-3PN package. It is a fast-acting high-current thyristor that has numerous applications in switching, phase control, motor control, and AC power control. It is widely used in home appliance, industrial automation, and control applications.

Application Field

The L4004L6 is used in a variety of applications. It can be used in AC phase control circuits such as industrial process control, phase angle control, and motor speed controllers. It is also used in power switching circuits for appliance control, such as in dishwashers, washers and dryers, and refrigerators. The device can also be used in AC power control applications such as electronic ballast circuits and solar panel DC to AC inverters.

Working Principle

The L4004L6 is a four-terminal thyristor device. The four terminals are the main terminal (MT), control Gate 1 (G1), control Gate 2 (G2), and the anode (A). The device works much like a regular thyristor with two control gates, except that it adds a fourth main terminal that is used to control the device’s conduction characteristics. The main terminal allows the device to be used in AC power control applications, whereas the two control gates are used to control the device’s switching characteristics.

The L4004L6 is normally in a “cut-off” state, meaning that the current flow through the device is blocked. To turn on the device (make it conduct), a positive voltage must be applied to either the G1 or G2 control gate terminal. This voltage must exceed an “breakover” voltage, or the “gate trigger” voltage of the device. When the trigger voltage is exceeded, the device will turn on and begin to conduct current in both directions.

The main terminal can then be used to control the conduction characteristics of the device. By applying a positive voltage to the MT terminal, the device will remain in a non-conducting state as long as the voltage is applied. The higher the MT voltage, the lower the conduction of the device. Thus, the MT terminal can be used to limit the amount of current drawn by the device and to prevent excessive current from flowing through the device.

Summary

The L4004L6 is a four-terminal thyristor device that is widely used in AC power control applications such as phase control, motor control, and AC power control. The device is normally in a “cut-off” state and can be turned on by applying a positive voltage to either the G1 or G2 control gate. The main terminal is used to control the conduction characteristics of the device, allowing for precise control of the current drawn by the device.