OT386,127

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Thyristors - TRIACs

A TRIAC is a device that belongs to the group of thyristors and is a three terminal, bidirectional semiconductor switch that finds applications in alternative current systems. It is an abbreviation of TRIode for alternative current and is a type of semiconductor, which uses two semiconductor junctions instead of only one, as in the case of a unity gain gate. The OT386,127 is a standard model among the family of TRIACs.

Applications

The OT386,127 is primarily intended for use as a static switched in industry applications. It is used across a wide range of power control systems for switching tasks ranging from 5 amperes to 10 amperes. Its application areas include AC motors, light dimming controls, and various kinds of solenoid valves. A TRIAC can effectively control power from 0-100% and is therefore used extensively in household appliances and convenience products.

Features

The OT386,127 is a versatile component, which is suitable for a wide range of industrial applications. It provides protection against overload, normally has high dielectric strength, is compatible with many control systems, is highly resilient, and is available in different sizes and packages.

Working Principle

The OT386,127 is a static switched device and functions according to a simple criterion. It works on the principle of break-before-make, which means that the device first switch off one of the power connections before it turns on the other power connection. This principle helps to prevent electrons from crossing each other, thus reducing the risk of any circuit malfunctioning. When used in the correct way along with the correct input voltage, the TRIAC guarantees a smooth switching experience.

Tutorial

To use the OT386,127 correctly one needs to understand the following technicalities:

• Load Working Criteria: The load connected to the OT386,127 must fulfill the following criteria in order to ensure a smooth working of the device: it should have a resistive load with fixed firing angle, inductive loads with trigger angle control and the triggering current should be slightly lower than the nominal value.
• Securing the Device: Since the OT386,127 is an electronic device, it is subject to heat and stress. It is best to secure the device to a heatsink in order to minimize the risk of permanent damage due to excessive heating.
• Output Voltage: The output voltage of the OT386,127 should be chosen in accordance with the input line voltage and with the load connected to the device. The device should be able to handle the specified maximum load with the input voltage ranging from 12 to 600 volts.
• Firing Control: The device supports digital and analog firing control. While the trigger angle and the peak current are important parameters, they can be controlled with the help of pulse-width modulation or resistance adjustment.

Conclusion

The OT386,127 is a standard model among the family of TRIACs that is most suitable for use in industry applications due to its load working criteria and its ability to provide overload protection. With the correct understanding and careful use of the device, it can provide an excellent performance and switch large loads of variable voltage with great precision.

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