L4004L5

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Thyristors - TRIACs

Thyristors, also known as Silicon-Controlled Rectifiers due to their control and rectification capabilities, are a group of semiconductor devices that can carry out switching, conduction, and turn-off operations. A TRIAC is a specific thyristor that consists of two independent thyristors connected in inverse parallel, with each side functioning as an independent device.

The L4004L5 thyristors are designed mainly for low voltage applications, such as power factor correction and motor control, and are intended for use in frequency converter, static switching, static frequency changer, static AC regulating, static 3-phase AC control, etc. Their non-availablility of current through the Gate pin make them suitable for low power AC switching.

The L4004L5 TRIACs are specifically designed for relatively low voltage and medium power switching applications. The L4004L5 TRIAC device is suitable for use as an AC switch, in static controlling and regulating. It can be used for circuits up to 400 Volts AC, with load currents up to 4A and dielectric strengths up to 8kV RMS. It comes in three different lead configurations - Pin 1, Pin 2 and Pin 3 - with the option to choose between two temperature classes, either VDR or Others.

This device operates under a single control signal and provides bidirectional current control since the Gate pin is common for both main terminals. This variable control signal applied to Gate determines the Turn-On voltage of the TRIAC, with the peak current capability being determined by gate triggering voltage. Lower gate signal levels generally ensure lower conduction losses.

The working principle of L4004L5 Thyristors is that it can be triggered with a positive or negative pulse applied to its Gate pin. When a positive electrical signal is applied to the GATE pin, the thyristor will turn on. This turning on process is essentially the junction between the anode and the cathode being forward biased. The current continues to flow through the thyristor until the signal is removed at which point, the thyristor turns off and the conducting channel is cut. Similarly, when a negative signal is applied to the GATE pin, the thyristor will again turn on, but with reversed polarities of the anode and cathode.

In terms of applications, the L4004L5 Thyristor can be used to provide efficient AC switching. It can be used, for example, to create AC power regulators, in which the output voltage is controlled by varying the firing angle at which the legs are triggered. A variable AC supply can be generated by controlling the firing angle, and this can be applied to AC motor speed controllers, where the motor speed is controlled by adjusting the firing angle of the thyristor.

The L4004L5 Thyristor can also be used as an AC switch and starter, where the on and off switching of the AC line can be achieved by controlling the Gate signal accordingly. It is also suitable for use in AC switching systems, such as those used in inductive and capacitive loads, where the gate signal can be varied to achieve the desired current flow.

To summarize, the L4004L5 Thyristors are mainly used for relatively low voltage and medium power applications. It is an efficient AC switching device that can be used to create AC power regulators, AC motor speed controllers, and AC switching systems. It is also fitted with a Gate pin, which can be used to control the voltage at which the thyristor turns on and off, thus providing bidirectional current control.

The specific data is subject to PDF, and the above content is for reference